MEDSI2018 - List of Keywords (synchrotron)

Paper	Title	Other Keywords	Page
TUPH09	Friction Stir Welding and Copper-Chromium Zirconium: a New Concept for the Design of Sirius' High-Power Absorbers	vacuum, alignment, operation, undulator	39
	G.V. Claudiano, P.T. Fonseca, L.M. Volpe LNLS, Campinas, Brazil E.B. Fonseca, M. H. S. Silva LNNano, Campinas, Brazil
	Funding: Ministry of Science, Technology, Innovation and Communication (MCTIC) Sirius, the new Brazilian fourth-generation synchrotron light source, is currently under construction. Due to the high brilliance and low emittance of its source, the pho-ton beam on each undulator beamline can have power densities as high as 55 W/mrad². To protect the compo-nents downstream, the Front-End power absorbers need to manage this power in a limited space, but also having precision in alignment and being reliable all over their lifetime. To achieve this behaviour, the selected alloy was the copper-chromium-zirconium (CuCrZr, commercially known as C18150) because of improved thermal and mechanical properties. In order to seal the vacuum cham-ber (path on which the cooling water flows), friction stir welding was the selected joining method. During the welding process, the material passes through a grain re-finement process which results in a high-resistance joint. The manufacturing process could also result on a reduc-tion of costs and lead times. Finally, it will be presented the final versions of the component with its support and the characterizations done to validate the welded joint under vacuum and water pressure requirements.
	Poster TUPH09 [2.987 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH09
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TUPH12	Multipole Injection Kicker (MIK), a Cooperative Project SOLEIL and MAX IV	SRF, vacuum, injection, electron	48
	J. Da Silva Castro, P. Alexandre, R. Ben El Fekih, T. S. Thoraud SOLEIL, Gif-sur-Yvette, France
	The cooperative MIK project SOLEIL / MAX IV started in 2012 and is part of the Franco-Swedish scientific collaboration agreement, signed in 2009 and followed by framework agreements signed in 2011. The MIK is a particular electromagnet using theoretical principles of the 1950s and recently used by the new generation of synchrotrons to significantly improve the Top-Up injection of electrons into the storage rings. Indeed, this type of magnet can drastically reduce disturbances on stored beams and also offers substantial space savings. The MIK is a real opportunity for synchrotrons wishing to upgrade their facilities. One of the first MIK developed by BESSY II in 2010 gave significant results. These results motivated SOLEIL and MAX IV to develop together their own MIK. Many technical challenges have been overcome in the area of mechanical design and manufacture as well as in magnetic and high voltage design of the MIK. Currently the first series is in operation at MAX IV and displays already outstanding performances. Optimization work is in progress.
	Poster TUPH12 [4.376 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH12
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TUPH16	Hammerhead Support Design and Application at SSRF	SRF, FEL, electron, radiation	60
	F. Gao, R.B. Deng, Z. Jiang, S. Xiang, L. Yin SINAP, Shanghai, People's Republic of China S.K. Sharma BNL, Upton, Long Island, New York, USA
	Electron beam stability is very important for Shanghai Synchrotron Radiation Facility(SSRF). One of the major players on beam stability is the vibration stability of magnet support systems. This paper describes several kinds of hammerhead magnet support prototypes with different structures, materials and ground fixation. Modal and response analyses of these prototypes are contrasted by finite-element analysis(FEA) and tests. The design can be applied to guide and improve the mechanical structures and the stability of magnet support systems at SSRF and other light source facilities.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH16
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TUPH18	Vacuum Performance Test of CuCrZr Photon Absorbers	vacuum, experiment, simulation, storage-ring	66
	Q. Li, D.Z. Guo, P. He, B.Q. Liu, Y. Ma, T.Z. Qi, X.J. Wang IHEP, Beijing, People's Republic of China E. Maccallini, P. Manini SAES Getters S.p.A., Lainate, Italy
	To test the pumping performance of NEG coated Cu-CrZr absorber, we performed a comparative experiment on the two absorbers, one with NGE coating and the other one without coating. First, we run the Monte Carlo simu-lation by using MolFlow+ code to estimate the pressure inside test chamber at different thermal outgassing rate. And then two absorbers are mounted inside the chamber for the pressure vs. time profiles testing. The experimental set-up and pressure profiles will be presented here.
	Poster TUPH18 [0.852 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH18
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TUPH21	Design of Vertical and Horizontal Linear Flexure Stages for Beam Size Monitor System	radiation, synchrotron-radiation, simulation, emittance	72
	W.Y. Lai, H.C. Ho, K.H. Hsu, D.-G. Huang, C.K. Kuan, C.J. Lin, S.Y. Perng, T.C. Tseng, H.S. Wang NSRRC, Hsinchu, Taiwan
	Taiwan photon source is a third generation accelerator with low emittance and high brightness. The electric beam size is one of important parameters to indicate the stabil-ity and to measure the emittance and coupling of light source. The aperture size of beam slitter is a crucial part to calculate the value of beam size in the X-ray pine-hole system. In order to obtain the more precise result of beam size, the flexure mechanism on beam slitter is applied for the adjustment of the aperture. This paper shows that the design concept and the measurement of the beam size are obtained by the new adjustment system.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH21
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TUPH26	A Quasi-Periodic Elliptically Polarized Undulator at the National Synchrotron Light Source II	undulator, MMI, radiation, multipole	88
	M. Musardo, P.L. Cappadoro, O.V. Chubar, T.M. Corwin, D.A. Harder, Y. Hidaka, J. Rank, T. Tanabe BNL, Upton, New York, USA C.A. Kitegi SOLEIL, Gif-sur-Yvette, France
	Funding: Work supported by DOE under contract DE-SC0012704 A 2.8 m long quasi-periodic APPLE II type undulator has been commissioned at the National Synchrotron Light Source II (NSLS-II) for the Electron Spectro-Microscopy (ESM) beamline in the framework of the NEXT (NSLS-II Experimental Tools) project. It provides high brilliance photon beams in circularly and linearly polarized radiation from VUV to soft X-Rays. The mechanical structure implemented to achieve the quasi-periodicity in the magnetic field profile is described together with the optimization techniques utilized to correct the undesirable phase-dependent errors. The final magnetic results are presented as well as the spectral performance of the device. Although this EPU (Elliptically Polarizing Undulator) was procured as a turn-key device, the vendor was only responsible for the mechanical frame and the control system. Sorting and assembly of the magnet modules and the magnetic field tuning - Virtual Shimming and Magic Finger - were performed at the NSLS-II Magnetic Measurement Lab.
	Poster TUPH26 [2.507 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH26
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TUPH30	ALBA Synchrotron Light Source Liquefaction Helium Plant	operation, experiment, MMI, ECR	102
	M. Prieto, J.J. Casas, C. Colldelram, Y. Nikitin ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	ALBA is a 3rd generation Synchrotron Light facility with: 8 operational Beam Lines (BLs), a 2nd BL of Phase II under construction and 3 first Phase III BLs in design phase. Some user experiments require Liquid Helium (LHe) as a coolant. The resulting LHe consumption at ALBA is about 650 l/week. Thus far the vaporized helium, which results from the refrigeration of experiments and equipment, has been released into the atmosphere without being reused. Due to the increasing price of LHe, ALBA agreed with ICN2 (Catalan Institute of Nanoscience and Nanotechnology) to invest in a Liquefaction Helium Plant. Internal staff has carried out the project, installation and pressure equipment legalization of the plant, which is located in a new 80 m2 construction. Under operation the plant allows recycling up to 24960 litres of LHe per year, which is an 80% of the helium consumed at ALBA, by making the gaseous helium undergo through 3 main stages: recovery, purification and liquefaction. The plant, unique in Catalonia, will entail cost savings about 77% and will reduce vulnerability to supply disruptions. ICN2 will benefit from a part of the production due to their initial investment.
	Poster TUPH30 [1.946 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH30
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TUPH35	Stainless Steel Vacuum Chambers for the EBS Storage Ring	vacuum, SRF, storage-ring, radiation	118
	P. Van Vaerenbergh, J.C. Biasci, D. Einfeld, L. Goirand, J. Léonardon, H.P. Marques, J. Pasquaud, K.B. Scheidt ESRF, Grenoble, France
	The upgrade of the ESRF (ESRF-EBS) is a highly challenging project in many respects. One major challenge is to manufacture vacuum chambers within extremely tight tolerances. Indeed the chamber envelope is constrained by the very limited space available between the beam stay clear and the magnets pole tips, requiring profile tolerances of just 500 um over the full length of the chamber for a width of 55 mm. An additional challenge is guaranteeing the perpendicularity (up to 0.75 mrad) between the CF flanges and the chamber body. While a design using discrete removable absorbers was chosen, one family of chambers contains a distributed absorber required to protect the insertion devices from 600 W of upstream dipole X-rays. Two companies have been selected to produce a total of 296 stainless steel chambers. Given the unusual tolerance requirements, the manufacturers have been obliged to adapt and develop their production techniques to overcome the challenges. During manufacture, vacuum leaks were discovered on some of the BPM buttons. This paper will also present the two techniques that ESRF has developed in order to prevent the integration of potentially leaking buttons.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH35
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TUPH39	The Design of LCLS-II Photon Beam Containment System	photon, FEL, experiment, operation	133
	H. Wang, Y. Feng, S. Forcat Oller, J. Krzywiński, E. Ortiz, M. Rowen SLAC, Menlo Park, California, USA
	LCLS-II will produce very powerful photon beams. Unlike conventional synchrotrons, the LCLS-II beam containment components withstand not only the high average beam power and power density, but also the instantaneous thermal shocks from pulsed FEL beam, which can reach ~9mJ/pulse. With beam repetition rate up to 1MHz, regular metal based beam collimators and absorbers will no longer work, because of the likelihood of fatigue failure. And because of the poor thermal conductivity, the old LCLS B4C based absorber would need very shallow glancing angle and take valuable beamline space. Hence, a low-Z and high thermal conductivity CVD diamond based photon beam collimator and absorber systems have been developed in LCSL-II. The initial damage tests using LCLS FEL beam provided positive results that graphite coated CVD diamond can endure per pulse dose level to ~0.5eV/atom. For the beamline and personnel safety, in addition to the passive CVD diamond collimators and absorbers, newly developed photon diode beam mis-steer detection systems and conventional SLAC pressurized burnt-through monitors have been also introduced in the photon beamline system design.
	Poster TUPH39 [1.251 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH39
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TUPH43	The LNLS Metrology Building - Environmental Control Results	controls, instrumentation, optics, operation	143
	H.G.P. de Oliveira, C.S.N.C. Bueno, L. Sanfelici, M.B. da Silva LNLS, Campinas, Brazil
	Funding: Ministry of Science, Technology, Innovation and Communication (MCTIC) Modern synchrotron light sources require high mechanical stability throughout its facilities, frequently demanding characterization processes in theμand nanometer scales. In this context, the Brazilian Synchrotron Light Laboratory (LNLS) built a new facility with several controlled environment rooms to minimize disturbances during optical and mechanical metrology procedures and to support advanced instrumentation development for the new Sirius' beamlines. The building design imposed very strict requirements regarding temperature, humidity and particles. This work presents the environmental control validation results and the floor vibration assessment enlightening the influence of the building machinery. Temperature variations below ± 0,1 °C were successfully achieved for all rooms, relative humidity is also better than 50 ± 5 % and the floor RMS displacement did not exceed 15 nm. The building is fully operational since early 2017 and currently hosting several tests on monochromators, mirrors, front-ends and many other systems for the Sirius beamlines. Metrology, environmental control, vibration assessment
	Poster TUPH43 [2.557 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH43
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WEOAMA01	The Status of the New High-Dynamic DCM for Sirius	controls, operation, vacuum, experiment	147
	R.R. Geraldes, R.M. Caliari, G.B.Z.L. Moreno, L. Sanfelici, M. Saveri Silva, H.C.N. Tolentino, H. Westfahl Jr. LNLS, Campinas, Brazil T.A.M. Ruijl, R.M. Schneider MI-Partners, Eindhoven, The Netherlands
	Funding: Ministry of Science, Technology, Innovation and Communication (MCTIC) The monochromator is known to be one of the most critical optical elements of a synchrotron beamline, since it directly affects the beam quality with respect to energy and position. Naturally, the new 4th genera-tion machines, with their small emittances, start to bring higher stability performance requirements, in spite of factors as high power loads and variations, high radiation levels, ultra-high vacuum compatibility and vibration sources. In response to that, an innova-tive concept of a high-dynamic vertical DCM (Double Crystal Monochromator) with angular range between 3 and 60 degrees (equivalent to 2.3 to 38 keV with Si(111)) has been developed at the Brazilian Synchro-tron Light Laboratory. A highly repeatable dynamic system, with servo control bandwidth of 250 Hz, has been achieved and will be installed at Sirius macromo-lecular crystallography beamline ' MANACA ' still in 2018. The complete offline results of the in-vacuum cryocooled high-dynamic DCM, showing stability between crystals around 15 nrad RMS up to 2.5 kHz, even during the Bragg angle motion for flyscans, are presented.
	Slides WEOAMA01 [7.575 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOAMA01
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WEOPMA05	Application of Industry Recognised Development Tools and Methodologies, such as Six Sigma to Facilitate the Efficient Delivery of Innovative and Robust Engineering Solutions at Synchrotron Facilities	hardware, experiment, controls, factory	184
	S. A. Macdonell DLS, Oxfordshire, United Kingdom
	Synchrotron facilities play a key part in the delivery of world leading science to facilitate research and development across multiple fields. The enabling technology designed by engineers at these facilities is crucial to their success. The highly academic nature of Synchrotron facilities does not always lead to working in the same way as a commercial engineering company. However, are the engineering requirements at Synchrotrons different to commercial companies? Exploring the parallels between research and commercial companies, can we show that the tools and methodologies employed could benefit engineering development at Synchrotrons? This paper provides a theoretical discussion on the commonality between engineering developments at Synchrotron facilities compared to commercial companies. How methodologies such as Design for Six Sigma and in particular tools such as stakeholder analysis, functional tree analysis, FMEA and DoE could be utilised in the design process at Synchrotrons. It also seeks to demonstrate how implementation could aid the development of innovative, robust and efficient design of engineering solutions to meet the ever-increasing demands of our facilities.
	Slides WEOPMA05 [1.633 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOPMA05
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WEOPMA07	Development of a New Sub-4k ARPES Endstation at PSI	radiation, ISOL, cryogenics, interface	193
	D. Trutmann, S. Hasanaj, St. Maag, L. Nue, A. Pfister, P.N. Plumb, A. Schwarb, S. Shi, K.M. Zehnder PSI, Villigen PSI, Switzerland
	Funding: Swiss National Science Foundation (SNSF) project number 206021₁64016 In spring 2016 a project was started to renew the high-resolution ARPES endstation of the Surface/Interface Spectroscopy (SIS) beamline at PSI. The focus lay on achieving sample temperatures below 4 K while maintaining 6 degrees of freedom. This made it necessary to redesign all thermally active parts, such as the connection to the cryostat, the flexible braid that enables the tilt and azimuthal movement, the sample clamping as well as the thermal isolators that hold the clamping device in place. A newly introduced shield in the main analyser chamber, cooled by separate cryopumps, is used to remove nearly all radiation heat load. A major milestone has recently been taken, by running cryogenic tests on a test stand. The simplified setup reached sample temperatures of 3.35 K. The temperature loss from the cryostat to the sample was as low as 0.6 K. Encouraged by these results, it is believed that the final endstation will be able to reach temperatures even below 3 K. With the new cryo concept, the thermal performance seems to be mainly limited by the radiative heat load emitted by the analyser lens. The new endstation is planned to be in operation by spring 2019.
	Slides WEOPMA07 [3.122 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOPMA07
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WEPH02	Thermomechanical Analysis of SESAME High-Heat-Load Front Ends Components	wiggler, simulation, radiation, dipole	202
	M.A. Al-Najdawi SESAME, Allan, Jordan
	New front end beamline components at SESAME* are designed to handle the high heat load produced by the insertion devices. A mini gap wiggler will be installed for the Material science Beamline and the front end will receive 5.0 kW of total power and 7.74 kW/mrad2 of peak power density. The power produced by the insertion device was simulated using SynRad+, this software is using Monte Carlo simulation to simulate the synchrotron radiation from either an insertion device or any magnet source, the surface power density distribution generated by this software mapped directly to an FEA software to conduct a coupled thermo-mechanical analsys. The design, modeling, power source simulation and FEA analysis of the fixed mask, shutter and filter for the material science Beamline front end will be presented in this paper Synchrotron-light for Experimental Science and Applications in the Middle East
	Poster WEPH02 [0.939 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH02
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WEPH12	Thermo-Mechanical Aspects of the MOBIPIX, a Compact X-Ray Imaging System with Embedded GPU	simulation, electron, detector, electronics	223
	A. Gilmour, W.R. Araujo, J.M. Polli LNLS, Campinas, Brazil
	Funding: The MOBIPIX project is part of Sirius project funded by the Brazilian Ministry of Science, Technology, Innovations and Communications. In the light of the high brilliance fourth generation syn-chrotron light sources, real-time imaging techniques be-came possible, boosting the demand for fast and reliable detectors. Mobipix project is a compact X-ray imaging camera based on Medipix3RX* ASIC designed for Sirius*. The control and acquisition system uses Sys-tem-On-a-Chip technology with embedded GPUs where data processing algorithms will run in real time. The Mobipix X-ray detector is de-signed to perform as a video camera, enabling X-ray imaging experiments and beam diagnose, at thousands of frames per second, without external computers. This paper presents the development of the Mobipix detector mechanics. The authors describe the path taken to design the structural aspects, ensuring robustness and versatility in the device installation to the beamlines, and the thermal aspects, regarding forced air cooling, high heat density, and small volume through which the flow will occur. The latter aspects were developed by exploiting CFD modelling. The Mobipix has 28 x 28 mm² active area, composed by 260k pixels of 55 x 55 'm2, and is planned to achieve continuous readout up to 2000 FPS. LNLS is a member of CERN Medipix3 Collaboration. https://medipix.web.cern.ch/collaboration/medipix3-collaboration ** Sirius is the new Brazilian Synchrotron Light Source under construction
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH12
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WEPH14	Optomechanical Optimization for a Sagittaly Bent Double Crystal Monochromator, Using Finite Elements and Ray Tracing	photon, focusing, software, radiation	231
	N. Jobert, E. Fonda, T. Moreno, M. Ribbens SOLEIL, Gif-sur-Yvette, France
	Designing a second crystal for a sagittally bent Double Crystal Monochromator (DCM) requires dealing with a number of conflicting requirements. Especially when working with high-energy photons, the angular aperture (Darwin width) becomes very narrow (below 10µrad for Si) while simultaneously the bending radius is increasing small (down to 1m for typical beamline dimensions at 40keV). In this situation, the cross-talk between tangential and sagittal curvature becomes a key parameter, and two strategies are generally used to overcome the issue: either using a flat crystal with a specific length/with ratio, or usage of a rib-stiffened crystal. In the frame of the upgrade of the SAMBA beamline DCM, both solutions have been explored, using a suite of scripts connecting a general purpose FEM code (ANSYS) and a ray-tracing code (SpotX). This has allowed a systematic evaluation of a wide number of configurations, giving insight in the interaction between geometric parameters, and ultimately resulting in a twofold increase in the photon throughput at 30keV without comprising neither spectral resolution nor spot size at sample location.
	Poster WEPH14 [3.378 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH14
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WEPH21	A Family of Redundant Positioning Devices for Synchrotron Applications	GUI, instrumentation, scattering	249
	G. Olea, N. Huber HUBER Diffraktiontechnik GmbH&Co.KG, Rimsting, Germany
	A family of reconfigurable devices able to work in synchrotron applications, especially in diffractometer environments has been developed. It can provide six (6) or less than six (<6) degrees of freedom (dof) motion capabilities (F<=6) being able to pose a heavy load sample (instruments) with high precision towards an X-ray coming beam. It is based on the Parallel Kinematics (PK) Quatropod concept with redundant actuation (Rd=2) and were built around the fully (F=6dof) basic topology 6-4(213) where 2-actuated and 1, 3-passive joints, respectively. By altering the passive joints dof, structures with less than six dof (F<6) can be obtained, e.g. 5-4[213(2)]/F=5, 4-4[213(1)]/F=4, 3-4[213(0)]/F=3 (3(2) and 3(1)and 3(0) stand for 3dof joint with constrained(less) dof - f=2, 1 or 0/blocked). For a perfect symmetric arrangement and using only P and S (P-prismatic, S-spherical) joints, several useful positioning mechanisms are presented. And, in the design phase, 2dof linear actuators(2P), e.g. XY stages have been proved to be a suitable choice, too. * J.P. Merlet, Parallel Robots Springer (2ed), 2006 G. Olea, D 202014 011 139 U1, DPMA, 2018 * HUBER GmbH, Diff. & Positioning Products, www.xhuber.com, 2018
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH21
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WEPH22	Le Guide for Support: A Cookbook for Modeling of Accelerator Structures*	alignment, damping, storage-ring, SRF	252
	C.A. Preissner, S.J. Izzo, Z. Liu, J. Nudell ANL, Argonne, Illinois, USA
	Funding: * Argonne National Laboratory's work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under contract DE-AC02- 06CH11357. The Advanced Photon Source-Upgrade (APS-U) project has stringent specifications and a 12 month installation schedule. Some form of these constraints appear to be common at all multi-bend achromat upgrade projects. At the APS-U, no full tests will be made of the final accelerator support design. The evaluation of the final design against the specifications will be based primarily on computer simulations using virtual inputs. Insuring that the final designs meet specifications solely based on simulations is much like cooking a complex, multi-course meal without a trial run. Producing a successful meal on the first try requires a prior understanding of the ingre-dients, techniques, and interactions between the constituents. A good cookbook can be essential in providing this under-standing. Likewise, producing an accelerator support final design that meets the requirements requires a prior under-standing of the materials, components, techniques, and interactions between them. This poster describes a cookbook-style approach that any design team can use to confidently predict important characteristics such as natural frequency and ambient vibration response with an error of around 10%.
	Poster WEPH22 [0.541 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH22
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WEPH26	High Rigidity Girder System for the Sirius Machine	alignment, damping, storage-ring, experiment	261
	M.C. Rocha, P.P.S. Freitas, T. Jasso, R. Junqueira Leão, A.L. Mesa, R.T. Neuenschwander, A.R.D. Rodrigues, F. Rodrigues LNLS, Campinas, Brazil
	Sirius is a 4th generation synchrotron light source under construction in Brazil, with a bare emittance of 250 picometer rad, scheduled to have the first beam late this year. One of the most important aspects for this ultra-low emittance machine is the stability of the components, especially the magnets. This paper describes the main characteristics of the girder system, including the concrete pedestal, the leveling units, the girder itself, the clamping mechanism for the magnets and the measurements procedures. Each detail was considered in the design phase and the result is a high rigidity setup with a first horizontal mode close to 170 Hz.
	Poster WEPH26 [1.313 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH26
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WEPH28	A Note of Thermal Analysis in Synchrotron Radiation Accelerator Engineering	radiation, synchrotron-radiation, insertion-device, undulator	264
	I.C. Sheng NSRRC, Hsinchu, Taiwan
	Thermal and thermomechanical analysis is one of the key process while designing accelerator components that may subject to synchrotron radiation heating. Even some closed-form solutions are available, and yet as to complex geometry numerical analysis such as finite element method (FEM) is commonly used to obtain the result. However due to its complexity of density distribution of the heat load, implementing such boundary conditions in the FEM model is relatively tedious. In this report we provide a simplified, practical and more conservative method to apply heat load both for bending magnet and insertion device. In addition, a general purpose synchrotron radiation heating numerical modeling is also introduced.
	Poster WEPH28 [0.390 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH28
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WEPH31	Optimization Method Using Thermal and Mechanical Simulations for Sirius High-Stability Mirrors	simulation, cryogenics, radiation, photon	273
	L.M. Volpe, G.V. Claudiano, R.R. Geraldes, S.A.L. Luiz, A.C. Pinto LNLS, Campinas, Brazil
	Funding: Brazil's Ministry of Science, Technology, Innovation and Communication (MCTIC) The mirrors for Sirius, the new 4th-generation synchrotron at the Brazilian Synchrotron Light Laboratory (LNLS), have strict requirements regarding thermo-mechanical stability and deformations, with figure height and slope errors limited to a few nanometers and tens of nanoradians, respectively. Therefore, fixed-shape mirrors have been defined with horizontally-reflecting orientation (except for vertically-reflecting mirrors of KB systems), whereas their cooling schemes (namely, air, water or liquid nitrogen cooling) depend on the particular power load. A thermal and mechanical optimization method was developed to guide the design of mirrors through the evaluation of deformations caused by power load, cooling, gravity, tightening of the fastening screws, manufacturing errors and modal analyses. Up to now, this method was already used to define the mirrors of Sirius' beamlines, which include plane, cylindrical, elliptical and ellipsoidal mirrors, as well as KB systems for microprobe and nanoprobe stations. Two examples are presented to illustrate the method.
	Poster WEPH31 [1.296 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH31
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WEPH32	DESIGN OF A LAYERED HIGH PRECISION MAGNET GIRDER	collimation, dipole, radiation, synchrotron-radiation	277
	G.Y. Wang, L. Kang, J.B. Yu, J.S. Zhang IHEP, Beijing, People's Republic of China J.X. Chen CSNS, Guangdong Province, People's Republic of China
	In order to adjust the collimation of the light source magnet, a layered magnet girder is developed, which can adjust the six degrees of freedom accurately and reduce the mutual influence of the adjustment process between the various layers of the girder. The precision of the collimation is up to 5 microns.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH32
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WEPH36	From Plate Screening to Artificial Intelligence: Innovative developments on PROXIMA 2A at Synchrotron SOLEIL	experiment, detector, GUI, instrumentation	283
	D. Jeangerard, L. Ciccone, D.K. Desjardins, A. Le Jollec, M. Savko, W. E. Shepard SOLEIL, Gif-sur-Yvette, France A. Haouz Pasteur Institute, Crystallisation and X-ray Diffraction (PF6), Paris, France
	PROXIMA 2A is a high performance 3rd generation synchrotron beamline dedicated to X-ray micro-crystallography on biological macromolecules. Since opening in March 2013, the experimental station has hosted a large number of users who have collected vast amounts of X-ray diffraction images from literally thousands of crystals. In order to streamline the throughput, enhance performance and add functionality, a number of innovative developments have been launched on PROXIMA 2A. These cover all aspects of the beamline, from the practical to the visionary: such as the design, fabrication and implementation of a dedicated high-precision motorized stage to screen crystallization plates for in situ X-ray data collections, and the employment artificial intelligence and computer vision technologies for the detection of samples under liquid nitrogen. Other notable beamline projects include the addition of a vertical translation table for the EIGER X 9M detector to permit the acquisition of ultrahigh (0.6 Å) resolution X-ray data, the incorporation of a miniaturized YAG-coupled photodiode within a beamstop and the determination of the SOC of a recently added kappa arm to the goniometer.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH36
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THOAMA01	Optimizing the PETRA IV Girder by Using Bio-Inspired Structures	lattice, radiation, storage-ring, ECR	297
	S. Andresen Alfred-Wegener-Institut, Bremerhaven, Germany
	The PETRA IV project at DESY (Deutsches Elektronen Synchrotron) aims at building a unique synchrotron light source to provide beams of hard X-rays with unprecedented coherence properties that can be focused to dimensions in the nanometer-regime. An optimization of the girder structure is necessary to reduce the impact of ambient vibrations on the particle beam. For this purpose, several numerical approaches have been made to simultaneously reach natural frequencies above 50 Hz, a high stiffness and a low mass. In order to define an optimal girder support, a parametric study was conducted varying both the number and location of support points. Based on the resulting arrangement of support points, topology optimizations were performed to achieve a high stiffness and a high first natural frequency. The following transformation of the results into parametric constructions allowed further parametric studies to find optimal geometry parameters leading to the aimed girder properties. In addition to that, bio-inspired structures based on marine organisms were applied to the girder which likewise resulted in improved girder properties.
	Slides THOAMA01 [10.895 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THOAMA01
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THOPMA01	Piezo Technology in Synchrotron	laser, resonance, vacuum, controls	321
	B. Laluc, T. Maillard, A. Riquer CTEC, MEYLAN, France
	Synchrotrons need robust products. That is why the association of piezo actuator technology and CEDRAT TECHNOLOGIES (CTEC) know-how has been successful for synchrotron mechanisms projects. The technological brick is the "Amplified Piezo Actuator" (APA®) tested and widely used in space applications, it is often implemented in CTEC piezo mechanisms and provides a high level of robustness. Modifying the layout and the number of APA® allows several needs to be addressed within beamlines. Three applications developed in collaboration with the EMBL, PAL and SOLEIL will be presented in this paper. The first application consists of cutting a beam with a piezo shutter. The maximum beam diameter is 3 mm. The second mechanism allows the energy of a beam to be modified by using a series of piezo actuated filters. And the last mechanism aims at modifying the beam section shape with an active piezo micro-slits mechanism. "Synchrotron SOLEIL" "EMBL ESRF Grenoble" "www.cedrat-technologies.com"
	Slides THOPMA01 [11.933 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THOPMA01
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THPH09	Design of Indirect X-Ray Detectors for Tomography on the Anatomix Beamline	detector, experiment, photon, SRF	355
	D.K. Desjardins, A.C. Carcy, J.L. Giorgetta, C. Menneglier, M. Scheel, T. Weitkamp SOLEIL, Gif-sur-Yvette, France
	ANATOMIX* is a long beamline for full-field tomography techniques at the French synchrotron SOLEIL [1]. It will operate in the energy range from 5 to 30 keV, and feature several operation modes via versatile optics configurations, including direct white beam propagation. Two methodologically different experimental stations will be used: parallel-beam X-ray shadowgraphy, for spatial resolution down to the sub-micron range, and full-field transmission X-ray microscopy down to a spatial resolution of less than 100 nm. To cover this large panel of experimental possibilities, the Detector Group, the Mechanical Engineering Group and beamline team have designed four dedicated indirect X-ray detector. For pixels in the sub-micron size range : a micro-tomography revolver camera for versatility, a high-efficiency camera for flux-limited experiments, and a high-resolution camera for the largest optical magnifications will be available. For experiments with a large X-ray beam and pixel sizes from several microns upward, a "large-field" camera completes the set. We describe these different assemblies with the detailed components and expected specification of each solution. * Beamline largely funded by the French National Research Agency through the EQUIPEX investment program, NanoimagesX. [1] T Weitkamp et al 2017 J. Phys.: Conf. Ser. 849 012037
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH09
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THPH12	Granite Benches for Sirius X-ray Optical Systems	alignment, GUI, interface, experiment	361
	R.R. Geraldes, C.S.N.C. Bueno, G.V. Claudiano, V.Z. Ferreira, M. Saveri Silva, A. Sikorski, M.S. Souza LNLS, Campinas, Brazil
	Funding: Ministry of Science, Technology, Innovation and Communication (MCTIC) The first set of Sirius beamlines is expected to start operating in early 2019 and over the last few years many optical systems for the X-ray beamlines have been developed in-house at the Brazilian Synchrotron Light Laboratory (LNLS). Starting with the High-Dynamic Double Crystal Monochromator (HD-DCM), passing by the Double Channel-Cut Monochromator (4CM) and continuing with new standard mirror sys-tems, a series of granite benches, based on high-resolution levellers, and a combination of embedded and commercial air-bearings, has been designed for high mechanical and thermal stability. Specifications, designs, and partial results are presented, showing the progressive increase in complexity according to a deterministic design approach.
	Poster THPH12 [3.907 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH12
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THPH16	Compact Mirror Bender With Sub-Nanometer Adaptive Correction Control	optics, controls, focusing, feedback	371
	N. Gonzalez, C. Colldelram, J.B. González Fernández, J. Juanhuix, J. Nicolás, C. Ruget ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	Funding: This work is partially funded by MINECO under contract FIS2015-66328-C3-2-R and by ERDF funds. We present a compact mirror bender with dynamic surface correction. The system is the evolution of an in-house development and will be the default focusing system for the new ALBA beamlines. The bender is now more compact and can introduce stronger curvatures, as required for microfocus applications. It allows for in-situ correction of the mirror surface, with resolution and stability below one nanometer. The bender can compensate parasitic deformations caused by thermal bumps, changes of focus, or stresses appeared during installation or bakeout. The system includes two torque actuators at the ends of the mirror as well as a number of correctors along the mirror length, capable of introducing high order surface corrections. The bending curvature is actively stabilized, by a feedback loop that controls the applied force, to the equivalent of 0.25 nm rms in a 500 mm long mirror. The figure correctors provide up to 20N push-pull force with resolution below .001 N. They combine elastic and magnetic forces to improve their stability.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH16
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THPH18	A Multi-sample Holder for the MSPD Beamline at ALBA	operation, GUI, interface, electronics	377
	J.B. González Fernández, F. Farré París, F. Fauth, P. Pedreira, D. Roldán, X. Serra Gallifa ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	At the high resolution powder diffraction end station of the Materials Science and Powder Diffraction (MSPD) beamline at ALBA Synchrotron, several samples are measured on a daily basis. Thus, an automatic sample exchanger is a great asset to the beamline, permitting a more efficient use of beam time. Even if a robot arm is the more suitable option for a sample exchanger device, in terms of cost, compactness and versatility MSPD needs another approach. ALBA engineering division has developed a multi-sample holder that allows the loading of up to eight samples and exchanging between them with a resolution of less than a micron. This new design consists of a customized and motorized linear stage that has been designed to fit into the present three-circles diffractometer, on top of the positioning stages, avoiding any possible collision with the Eulerian cradle. In addition, this new holder permits the use of different types of samples like capillaries in fast spinners, coin cell batteries and electrochemical cells. Finally, the system is compatible with the usual sample conditioning equipment on the end station such as the hot blower, cryostream, beamstop, chiller, etc.
	Poster THPH18 [3.052 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH18
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THPH26	Mechanical Conversion of a Vertically Reflecting Artificial Channel-cut Monochromator to Horizontally Reflecting	photon, vacuum, focusing, MMI	391
	S.P. Kearney, E.M. Dufresne, S. Narayanan, A. Sandy, D. Shu ANL, Argonne, Illinois, USA
	Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357. The mechanical conversion of a high-resolution artificial channel-cut monochromator (ACCM) from a vertically reflecting orientation to a horizontally reflecting orientation is presented. The ACCM was originally commissioned for the 8-ID-I beamline at the Advanced Photon Source (APS), Argonne National Laboratory [1, 2]. The ACCM was intentionally designed at commission to have the potential to be reoriented to the horizontal direction. After nearly a decade of operation in the vertical orientation the ACCM was rotated to the horizontal orientation. The details of the design which allowed this conversion and the preparation steps needed to assure the continued performance of the ACCM will be discussed. * Narayanan, S., et al., J. Synchrotron Radiat. 15(1), 12-18 (2008). ** U.S. Patent granted No. 6,607, 840, D. Shu, T. S. Toellner, and E. E. Alp, 2003.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH26
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THPH32	Dual Beam Visualizer - Intensity Monitor for Lucia Beamline at SOLEIL Synchrotron	photon, diagnostics, radiation, optics	403
	C. Menneglier, D.K. Desjardins, V. Pinty, D. Roy, D. Vantelon SOLEIL, Gif-sur-Yvette, France
	LUCIA is a micro-focused beamline (0.8 - 8 keV) dedicated to X-ray fluorescence and X-ray absorption spectroscopy at SOLEIL Synchrotron.* With its recent optical upgrade and photons flux increase, the three pink-beam diagnostics of the beamline have been upgraded to support a beam reaching 10¹³ph/s and 20 W/mm². This paper presents the thermomechanical study and the realization of new devices adapted to the current constraints of use, making possible to both visualize the shape of the pink beam and to measure its intensity simultaneously in the same compact device. The beam is visualized by a piece of Al2O3 - Cr ceramic, soldered to a copper heat sink, whose fluorescence image is visible in visible light with a suitable camera and optical system. The measurement of the photonic intensity is made by a polarized CVD diamond used as a photosensitive element, the current reading is made by a suitable low current amplifier. The design of this dual beam visualizer and intensity monitor, made by the SOLEIL detectors group with thermomechanical studies done by the Mechanical Design Office, will be presented in details. In-lab measurements will be also presented. * D. Vantelon et al., The LUCIA beamline at SOLEIL, Journal of Synchrotron Radiation, vol 23 (part 2), pp 635-640, March 2016. doi:10.1107/S1600577516000746
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH32
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THPH37	MAGSTAT V3: An In-Vacuum Variable-Gap Quadrupole with Rotary Permanent Magnets	quadrupole, vacuum, GUI, permanent-magnet	412
	V. Pinty, N. Jaouen, F. Marteau, H. Popescu, P. Prout SOLEIL, Gif-sur-Yvette, France
	MAGSTAT is a quadrupole designed to magnetize samples with a variable magnetic field in flow density and in directions. Four rotary permanent magnets allow the user to specify a direction for the field and changing in situ the gap between the poles drives the field intensity. The first prototype was realized in 2016 on the SEXTANTS beamline in the framework of SOLEIL-MAXIV collaboration; a second version has been manufactured for MAXIV SoftImax beamline. This third version shows a significant evolution of the mechanical design, guaranteeing a much better stiffness in high field configurations. Samples up to Ø74mm can be placed in this quadrupole, and the tiny ones which may fit in a Ø10mm circle or smaller, can be magnetized with a 1T local field. The angle of each magnet is driven by a dedicated stepper motors with a big reduction ratio. The total gap is ensured by a single motor, and its motion is symmetrically transferred to the magnets through an Archimedean spiral. The first prototype is installed at COMET endstation dedicated to the coherent scattering of soft X-ray in transmission for imaging magnetic materials via the Fourier Transform Holography or ptychography techniques.
	Poster THPH37 [57.424 MB]
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THPH39	Novel Comprehensive UHV Lens Changer at the PETRA III Beamlines P22, P23 and P24	alignment, vacuum, focusing, GUI	418
	J. Raabe, K. Ederer, R. Grifone, D. Novikov, C. Schlüter DESY, Hamburg, Germany
	The design of a compact UHV-compatible X-ray transfocator for beryllium compound refractive lenses (CRL) is presented. CRLs are nowadays commonly applied as focusing elements in a lot of techniques based on synchrotron radiation. Aim of the current project was the development of a low-maintenance lens changer for beam focusing, collimation and aperture matching. The paper describes the new lens changer designs for the reliable use under ultrahigh vacuum conditions. Precise and reproducible alignment is achieved by pneumatic actuators that press the lens stacks against a high precision prism. All actuators and position sensors are placed outside the UHV vessel. Alignment is facilitated by integrated beam monitors and alignment apertures. We discuss two variants of the device, one designed for 2D lenses and the other one operating with 1D lenses. In the current version, the 2D lens changer adapts 12 stacks of up to 8 single lenses each, and the 1D variant ' 8 single lenses or apertures.
	Poster THPH39 [0.190 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH39
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THPH40	Training the Next Generation of Engineers for Photon Based Light Sources	ECR, survey, site, electron	421
	S.M. Scott DLS, Oxfordshire, United Kingdom
	The continued increase in the number of Light Sources, their beamlines and the need for upgrades of both machine and beamlines requires an ever larger supply of suitably qualified and experienced engineers. If there is a world wide shortage of Engineers where will facilities find these engineers and how can they be trained to the required level? This paper discusses these issues by looking at the growth of demand for engineers within light sources, the evidence of shortages of engineers, the changes in attitudes to work by younger people, the skills necessary, training opportunities and the issues in attracting people into the light sources industry. The paper will also outline the training week for early career engineers delivered at Diamond.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH40
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THPH43	New Holder for Dual-Axis Cryo Soft X-Ray Tomography of Cells at the Mistral Beamline	cryogenics, vacuum, shielding, radiation	427
	R. Valcárcel, C. Colldelram, N. Gonzalez, E. Pereiro, A.J. Pérez-Berná, A. Sorrentino ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	A new dual-axis sample holder has been designed and built for the Transmission soft X-ray Microscope (TXM) at the MISTRAL beamline (ALBA Synchrotron) to perform cryo-soft X-ray tomography of cells with dual tilt configuration to reduce the missing wedge. The design, with restricted dimensions Ø7x30mm, enables using commercial Auto-Grid support rings that give rigidity to the sample grid handling. It consists of a guided miniature handle with a spring system that allows sample rotation by 90° around the beam axis inside vacuum and in cryogenic conditions by using the TXM sample loading robot keeping a rotation of ±65° at the sample stage. Two magnets fix the positions at 0° and 90°.The two tilt series can be collected consecutively and the use of Au fiducials permits combining both improving the final quality of the 3D reconstructions. In particular, cellular features hidden due to their orientation with respect to the axis of rotation become visible. The main frame is made in aluminium bronze to enhance the thermal conductivity and in addition, all the pieces have undergone an ion implantation treatment in order to reduce friction and improve the anti-seizure property of the parts.
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FROAMA02	A High Heat Load Double Crystal Monochromator and Its Cryo Cooling System for Heps	ISOL, vacuum, controls, optics	430
	H. Liang, L. Gao, Y.C. Jiang, W.F. Sheng, S. Tang, A.Y. Zhou IHEP, Beijing, People's Republic of China G. Cao University of Chinese Academy of Sciences, Beijing, People's Republic of China
	A high heat load double crystal monochromator and its cryo cooling system were designed and their prototypes were fabricated for the future HEPS. The mechanical and cooling structure of the DCM are introduced. The FEA results show the DCM is capable of cooling 870 watts of heat load. The cryo cooling system is also introduced. Test results show the pressure stability of the cryo cooling system is less than 2 mbar RMS. Offline heat load test of the DCM were carried out by a ceramic heater attached to the center of the incident surface of the first crystal, and 834 watts heat load were applied by the heater without boiling the liquid nitrogen. Offline absolute vibration measurement of the second crystal assembly was carried out by a laser interferometer under different cryo pump speed, pressure and heat load conditions, to find out the stability performance accordingly. An absolute vibration of 41 nrad RMS was measured, with the pump running at 45Hz, which has a cooling capability of 400 watts.
	Slides FROAMA02 [7.370 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-FROAMA02
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Paper

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TUPH09

Friction Stir Welding and Copper-Chromium Zirconium: a New Concept for the Design of Sirius' High-Power Absorbers

vacuum, alignment, operation, undulator

39

G.V. Claudiano, P.T. Fonseca, L.M. Volpe
LNLS, Campinas, Brazil
E.B. Fonseca, M. H. S. Silva
LNNano, Campinas, Brazil

Funding: Ministry of Science, Technology, Innovation and Communication (MCTIC)
Sirius, the new Brazilian fourth-generation synchrotron light source, is currently under construction. Due to the high brilliance and low emittance of its source, the pho-ton beam on each undulator beamline can have power densities as high as 55 W/mrad². To protect the compo-nents downstream, the Front-End power absorbers need to manage this power in a limited space, but also having precision in alignment and being reliable all over their lifetime. To achieve this behaviour, the selected alloy was the copper-chromium-zirconium (CuCrZr, commercially known as C18150) because of improved thermal and mechanical properties. In order to seal the vacuum cham-ber (path on which the cooling water flows), friction stir welding was the selected joining method. During the welding process, the material passes through a grain re-finement process which results in a high-resistance joint. The manufacturing process could also result on a reduc-tion of costs and lead times. Finally, it will be presented the final versions of the component with its support and the characterizations done to validate the welded joint under vacuum and water pressure requirements.

Poster TUPH09 [2.987 MB]

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TUPH12

Multipole Injection Kicker (MIK), a Cooperative Project SOLEIL and MAX IV

SRF, vacuum, injection, electron

48

J. Da Silva Castro, P. Alexandre, R. Ben El Fekih, T. S. Thoraud
SOLEIL, Gif-sur-Yvette, France

The cooperative MIK project SOLEIL / MAX IV started in 2012 and is part of the Franco-Swedish scientific collaboration agreement, signed in 2009 and followed by framework agreements signed in 2011. The MIK is a particular electromagnet using theoretical principles of the 1950s and recently used by the new generation of synchrotrons to significantly improve the Top-Up injection of electrons into the storage rings. Indeed, this type of magnet can drastically reduce disturbances on stored beams and also offers substantial space savings. The MIK is a real opportunity for synchrotrons wishing to upgrade their facilities. One of the first MIK developed by BESSY II in 2010 gave significant results. These results motivated SOLEIL and MAX IV to develop together their own MIK. Many technical challenges have been overcome in the area of mechanical design and manufacture as well as in magnetic and high voltage design of the MIK. Currently the first series is in operation at MAX IV and displays already outstanding performances. Optimization work is in progress.

Poster TUPH12 [4.376 MB]

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TUPH16

Hammerhead Support Design and Application at SSRF

SRF, FEL, electron, radiation

60

F. Gao, R.B. Deng, Z. Jiang, S. Xiang, L. Yin
SINAP, Shanghai, People's Republic of China
S.K. Sharma
BNL, Upton, Long Island, New York, USA

Electron beam stability is very important for Shanghai Synchrotron Radiation Facility(SSRF). One of the major players on beam stability is the vibration stability of magnet support systems. This paper describes several kinds of hammerhead magnet support prototypes with different structures, materials and ground fixation. Modal and response analyses of these prototypes are contrasted by finite-element analysis(FEA) and tests. The design can be applied to guide and improve the mechanical structures and the stability of magnet support systems at SSRF and other light source facilities.

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TUPH18

Vacuum Performance Test of CuCrZr Photon Absorbers

vacuum, experiment, simulation, storage-ring

66

Q. Li, D.Z. Guo, P. He, B.Q. Liu, Y. Ma, T.Z. Qi, X.J. Wang
IHEP, Beijing, People's Republic of China
E. Maccallini, P. Manini
SAES Getters S.p.A., Lainate, Italy

To test the pumping performance of NEG coated Cu-CrZr absorber, we performed a comparative experiment on the two absorbers, one with NGE coating and the other one without coating. First, we run the Monte Carlo simu-lation by using MolFlow+ code to estimate the pressure inside test chamber at different thermal outgassing rate. And then two absorbers are mounted inside the chamber for the pressure vs. time profiles testing. The experimental set-up and pressure profiles will be presented here.

Poster TUPH18 [0.852 MB]

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TUPH21

Design of Vertical and Horizontal Linear Flexure Stages for Beam Size Monitor System

radiation, synchrotron-radiation, simulation, emittance

72

W.Y. Lai, H.C. Ho, K.H. Hsu, D.-G. Huang, C.K. Kuan, C.J. Lin, S.Y. Perng, T.C. Tseng, H.S. Wang
NSRRC, Hsinchu, Taiwan

Taiwan photon source is a third generation accelerator with low emittance and high brightness. The electric beam size is one of important parameters to indicate the stabil-ity and to measure the emittance and coupling of light source. The aperture size of beam slitter is a crucial part to calculate the value of beam size in the X-ray pine-hole system. In order to obtain the more precise result of beam size, the flexure mechanism on beam slitter is applied for the adjustment of the aperture. This paper shows that the design concept and the measurement of the beam size are obtained by the new adjustment system.

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TUPH26

A Quasi-Periodic Elliptically Polarized Undulator at the National Synchrotron Light Source II

undulator, MMI, radiation, multipole

88

M. Musardo, P.L. Cappadoro, O.V. Chubar, T.M. Corwin, D.A. Harder, Y. Hidaka, J. Rank, T. Tanabe
BNL, Upton, New York, USA
C.A. Kitegi
SOLEIL, Gif-sur-Yvette, France

Funding: Work supported by DOE under contract DE-SC0012704
A 2.8 m long quasi-periodic APPLE II type undulator has been commissioned at the National Synchrotron Light Source II (NSLS-II) for the Electron Spectro-Microscopy (ESM) beamline in the framework of the NEXT (NSLS-II Experimental Tools) project. It provides high brilliance photon beams in circularly and linearly polarized radiation from VUV to soft X-Rays. The mechanical structure implemented to achieve the quasi-periodicity in the magnetic field profile is described together with the optimization techniques utilized to correct the undesirable phase-dependent errors. The final magnetic results are presented as well as the spectral performance of the device. Although this EPU (Elliptically Polarizing Undulator) was procured as a turn-key device, the vendor was only responsible for the mechanical frame and the control system. Sorting and assembly of the magnet modules and the magnetic field tuning - Virtual Shimming and Magic Finger - were performed at the NSLS-II Magnetic Measurement Lab.

Poster TUPH26 [2.507 MB]

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TUPH30

ALBA Synchrotron Light Source Liquefaction Helium Plant

operation, experiment, MMI, ECR

102

M. Prieto, J.J. Casas, C. Colldelram, Y. Nikitin
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

ALBA is a 3rd generation Synchrotron Light facility with: 8 operational Beam Lines (BLs), a 2nd BL of Phase II under construction and 3 first Phase III BLs in design phase. Some user experiments require Liquid Helium (LHe) as a coolant. The resulting LHe consumption at ALBA is about 650 l/week. Thus far the vaporized helium, which results from the refrigeration of experiments and equipment, has been released into the atmosphere without being reused. Due to the increasing price of LHe, ALBA agreed with ICN2 (Catalan Institute of Nanoscience and Nanotechnology) to invest in a Liquefaction Helium Plant. Internal staff has carried out the project, installation and pressure equipment legalization of the plant, which is located in a new 80 m2 construction. Under operation the plant allows recycling up to 24960 litres of LHe per year, which is an 80% of the helium consumed at ALBA, by making the gaseous helium undergo through 3 main stages: recovery, purification and liquefaction. The plant, unique in Catalonia, will entail cost savings about 77% and will reduce vulnerability to supply disruptions. ICN2 will benefit from a part of the production due to their initial investment.

Poster TUPH30 [1.946 MB]

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TUPH35

Stainless Steel Vacuum Chambers for the EBS Storage Ring

vacuum, SRF, storage-ring, radiation

118

P. Van Vaerenbergh, J.C. Biasci, D. Einfeld, L. Goirand, J. Léonardon, H.P. Marques, J. Pasquaud, K.B. Scheidt
ESRF, Grenoble, France

The upgrade of the ESRF (ESRF-EBS) is a highly challenging project in many respects. One major challenge is to manufacture vacuum chambers within extremely tight tolerances. Indeed the chamber envelope is constrained by the very limited space available between the beam stay clear and the magnets pole tips, requiring profile tolerances of just 500 um over the full length of the chamber for a width of 55 mm. An additional challenge is guaranteeing the perpendicularity (up to 0.75 mrad) between the CF flanges and the chamber body. While a design using discrete removable absorbers was chosen, one family of chambers contains a distributed absorber required to protect the insertion devices from 600 W of upstream dipole X-rays. Two companies have been selected to produce a total of 296 stainless steel chambers. Given the unusual tolerance requirements, the manufacturers have been obliged to adapt and develop their production techniques to overcome the challenges. During manufacture, vacuum leaks were discovered on some of the BPM buttons. This paper will also present the two techniques that ESRF has developed in order to prevent the integration of potentially leaking buttons.

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TUPH39

The Design of LCLS-II Photon Beam Containment System

photon, FEL, experiment, operation

133

H. Wang, Y. Feng, S. Forcat Oller, J. Krzywiński, E. Ortiz, M. Rowen
SLAC, Menlo Park, California, USA

LCLS-II will produce very powerful photon beams. Unlike conventional synchrotrons, the LCLS-II beam containment components withstand not only the high average beam power and power density, but also the instantaneous thermal shocks from pulsed FEL beam, which can reach ~9mJ/pulse. With beam repetition rate up to 1MHz, regular metal based beam collimators and absorbers will no longer work, because of the likelihood of fatigue failure. And because of the poor thermal conductivity, the old LCLS B4C based absorber would need very shallow glancing angle and take valuable beamline space. Hence, a low-Z and high thermal conductivity CVD diamond based photon beam collimator and absorber systems have been developed in LCSL-II. The initial damage tests using LCLS FEL beam provided positive results that graphite coated CVD diamond can endure per pulse dose level to ~0.5eV/atom. For the beamline and personnel safety, in addition to the passive CVD diamond collimators and absorbers, newly developed photon diode beam mis-steer detection systems and conventional SLAC pressurized burnt-through monitors have been also introduced in the photon beamline system design.

Poster TUPH39 [1.251 MB]

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TUPH43

The LNLS Metrology Building - Environmental Control Results

controls, instrumentation, optics, operation

143

H.G.P. de Oliveira, C.S.N.C. Bueno, L. Sanfelici, M.B. da Silva
LNLS, Campinas, Brazil

Funding: Ministry of Science, Technology, Innovation and Communication (MCTIC)
Modern synchrotron light sources require high mechanical stability throughout its facilities, frequently demanding characterization processes in theμand nanometer scales. In this context, the Brazilian Synchrotron Light Laboratory (LNLS) built a new facility with several controlled environment rooms to minimize disturbances during optical and mechanical metrology procedures and to support advanced instrumentation development for the new Sirius' beamlines. The building design imposed very strict requirements regarding temperature, humidity and particles. This work presents the environmental control validation results and the floor vibration assessment enlightening the influence of the building machinery. Temperature variations below ± 0,1 °C were successfully achieved for all rooms, relative humidity is also better than 50 ± 5 % and the floor RMS displacement did not exceed 15 nm. The building is fully operational since early 2017 and currently hosting several tests on monochromators, mirrors, front-ends and many other systems for the Sirius beamlines.
Metrology, environmental control, vibration assessment

Poster TUPH43 [2.557 MB]

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WEOAMA01

The Status of the New High-Dynamic DCM for Sirius

controls, operation, vacuum, experiment

147

R.R. Geraldes, R.M. Caliari, G.B.Z.L. Moreno, L. Sanfelici, M. Saveri Silva, H.C.N. Tolentino, H. Westfahl Jr.
LNLS, Campinas, Brazil
T.A.M. Ruijl, R.M. Schneider
MI-Partners, Eindhoven, The Netherlands

Funding: Ministry of Science, Technology, Innovation and Communication (MCTIC)
The monochromator is known to be one of the most critical optical elements of a synchrotron beamline, since it directly affects the beam quality with respect to energy and position. Naturally, the new 4th genera-tion machines, with their small emittances, start to bring higher stability performance requirements, in spite of factors as high power loads and variations, high radiation levels, ultra-high vacuum compatibility and vibration sources. In response to that, an innova-tive concept of a high-dynamic vertical DCM (Double Crystal Monochromator) with angular range between 3 and 60 degrees (equivalent to 2.3 to 38 keV with Si(111)) has been developed at the Brazilian Synchro-tron Light Laboratory. A highly repeatable dynamic system, with servo control bandwidth of 250 Hz, has been achieved and will be installed at Sirius macromo-lecular crystallography beamline ' MANACA ' still in 2018. The complete offline results of the in-vacuum cryocooled high-dynamic DCM, showing stability between crystals around 15 nrad RMS up to 2.5 kHz, even during the Bragg angle motion for flyscans, are presented.

Slides WEOAMA01 [7.575 MB]

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WEOPMA05

Application of Industry Recognised Development Tools and Methodologies, such as Six Sigma to Facilitate the Efficient Delivery of Innovative and Robust Engineering Solutions at Synchrotron Facilities

hardware, experiment, controls, factory

184

S. A. Macdonell
DLS, Oxfordshire, United Kingdom

Synchrotron facilities play a key part in the delivery of world leading science to facilitate research and development across multiple fields. The enabling technology designed by engineers at these facilities is crucial to their success. The highly academic nature of Synchrotron facilities does not always lead to working in the same way as a commercial engineering company. However, are the engineering requirements at Synchrotrons different to commercial companies? Exploring the parallels between research and commercial companies, can we show that the tools and methodologies employed could benefit engineering development at Synchrotrons? This paper provides a theoretical discussion on the commonality between engineering developments at Synchrotron facilities compared to commercial companies. How methodologies such as Design for Six Sigma and in particular tools such as stakeholder analysis, functional tree analysis, FMEA and DoE could be utilised in the design process at Synchrotrons. It also seeks to demonstrate how implementation could aid the development of innovative, robust and efficient design of engineering solutions to meet the ever-increasing demands of our facilities.

Slides WEOPMA05 [1.633 MB]

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WEOPMA07

Development of a New Sub-4k ARPES Endstation at PSI

radiation, ISOL, cryogenics, interface

193

D. Trutmann, S. Hasanaj, St. Maag, L. Nue, A. Pfister, P.N. Plumb, A. Schwarb, S. Shi, K.M. Zehnder
PSI, Villigen PSI, Switzerland

Funding: Swiss National Science Foundation (SNSF) project number 206021₁64016
In spring 2016 a project was started to renew the high-resolution ARPES endstation of the Surface/Interface Spectroscopy (SIS) beamline at PSI. The focus lay on achieving sample temperatures below 4 K while maintaining 6 degrees of freedom. This made it necessary to redesign all thermally active parts, such as the connection to the cryostat, the flexible braid that enables the tilt and azimuthal movement, the sample clamping as well as the thermal isolators that hold the clamping device in place. A newly introduced shield in the main analyser chamber, cooled by separate cryopumps, is used to remove nearly all radiation heat load. A major milestone has recently been taken, by running cryogenic tests on a test stand. The simplified setup reached sample temperatures of 3.35 K. The temperature loss from the cryostat to the sample was as low as 0.6 K. Encouraged by these results, it is believed that the final endstation will be able to reach temperatures even below 3 K. With the new cryo concept, the thermal performance seems to be mainly limited by the radiative heat load emitted by the analyser lens. The new endstation is planned to be in operation by spring 2019.

Slides WEOPMA07 [3.122 MB]

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WEPH02

Thermomechanical Analysis of SESAME High-Heat-Load Front Ends Components

wiggler, simulation, radiation, dipole

202

M.A. Al-Najdawi
SESAME, Allan, Jordan

New front end beamline components at SESAME* are designed to handle the high heat load produced by the insertion devices. A mini gap wiggler will be installed for the Material science Beamline and the front end will receive 5.0 kW of total power and 7.74 kW/mrad2 of peak power density. The power produced by the insertion device was simulated using SynRad+, this software is using Monte Carlo simulation to simulate the synchrotron radiation from either an insertion device or any magnet source, the surface power density distribution generated by this software mapped directly to an FEA software to conduct a coupled thermo-mechanical analsys. The design, modeling, power source simulation and FEA analysis of the fixed mask, shutter and filter for the material science Beamline front end will be presented in this paper
Synchrotron-light for Experimental Science and Applications in the Middle East

Poster WEPH02 [0.939 MB]

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WEPH12

Thermo-Mechanical Aspects of the MOBIPIX, a Compact X-Ray Imaging System with Embedded GPU

simulation, electron, detector, electronics

223

A. Gilmour, W.R. Araujo, J.M. Polli
LNLS, Campinas, Brazil

Funding: The MOBIPIX project is part of Sirius project funded by the Brazilian Ministry of Science, Technology, Innovations and Communications.
In the light of the high brilliance fourth generation syn-chrotron light sources, real-time imaging techniques be-came possible, boosting the demand for fast and reliable detectors. Mobipix project is a compact X-ray imaging camera based on Medipix3RX* ASIC designed for Sirius**. The control and acquisition system uses Sys-tem-On-a-Chip technology with embedded GPUs where data processing algorithms will run in real time. The Mobipix X-ray detector is de-signed to perform as a video camera, enabling X-ray imaging experiments and beam diagnose, at thousands of frames per second, without external computers. This paper presents the development of the Mobipix detector mechanics. The authors describe the path taken to design the structural aspects, ensuring robustness and versatility in the device installation to the beamlines, and the thermal aspects, regarding forced air cooling, high heat density, and small volume through which the flow will occur. The latter aspects were developed by exploiting CFD modelling. The Mobipix has 28 x 28 mm² active area, composed by 260k pixels of 55 x 55 'm2, and is planned to achieve continuous readout up to 2000 FPS.
* LNLS is a member of CERN Medipix3 Collaboration. https://medipix.web.cern.ch/collaboration/medipix3-collaboration
** Sirius is the new Brazilian Synchrotron Light Source under construction

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WEPH14

Optomechanical Optimization for a Sagittaly Bent Double Crystal Monochromator, Using Finite Elements and Ray Tracing

photon, focusing, software, radiation

231

N. Jobert, E. Fonda, T. Moreno, M. Ribbens
SOLEIL, Gif-sur-Yvette, France

Designing a second crystal for a sagittally bent Double Crystal Monochromator (DCM) requires dealing with a number of conflicting requirements. Especially when working with high-energy photons, the angular aperture (Darwin width) becomes very narrow (below 10µrad for Si) while simultaneously the bending radius is increasing small (down to 1m for typical beamline dimensions at 40keV). In this situation, the cross-talk between tangential and sagittal curvature becomes a key parameter, and two strategies are generally used to overcome the issue: either using a flat crystal with a specific length/with ratio, or usage of a rib-stiffened crystal. In the frame of the upgrade of the SAMBA beamline DCM, both solutions have been explored, using a suite of scripts connecting a general purpose FEM code (ANSYS) and a ray-tracing code (SpotX). This has allowed a systematic evaluation of a wide number of configurations, giving insight in the interaction between geometric parameters, and ultimately resulting in a twofold increase in the photon throughput at 30keV without comprising neither spectral resolution nor spot size at sample location.

Poster WEPH14 [3.378 MB]

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WEPH21

A Family of Redundant Positioning Devices for Synchrotron Applications

GUI, instrumentation, scattering

249

G. Olea, N. Huber
HUBER Diffraktiontechnik GmbH&Co.KG, Rimsting, Germany

A family of reconfigurable devices able to work in synchrotron applications, especially in diffractometer environments has been developed. It can provide six (6) or less than six (<6) degrees of freedom (dof) motion capabilities (F<=6) being able to pose a heavy load sample (instruments) with high precision towards an X-ray coming beam. It is based on the Parallel Kinematics (PK) Quatropod concept with redundant actuation (Rd=2) and were built around the fully (F=6dof) basic topology 6-4(213) where 2-actuated and 1, 3-passive joints, respectively. By altering the passive joints dof, structures with less than six dof (F<6) can be obtained, e.g. 5-4[213(2)]/F=5, 4-4[213(1)]/F=4, 3-4[213(0)]/F=3 (3(2) and 3(1)and 3(0) stand for 3dof joint with constrained(less) dof - f=2, 1 or 0/blocked). For a perfect symmetric arrangement and using only P and S (P-prismatic, S-spherical) joints, several useful positioning mechanisms are presented. And, in the design phase, 2dof linear actuators(2P), e.g. XY stages have been proved to be a suitable choice, too.
* J.P. Merlet, Parallel Robots Springer (2ed), 2006
** G. Olea, D 202014 011 139 U1, DPMA, 2018
*** HUBER GmbH, Diff. & Positioning Products, www.xhuber.com, 2018

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WEPH22

Le Guide for Support: A Cookbook for Modeling of Accelerator Structures*

alignment, damping, storage-ring, SRF

252

C.A. Preissner, S.J. Izzo, Z. Liu, J. Nudell
ANL, Argonne, Illinois, USA

Funding: * Argonne National Laboratory's work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under contract DE-AC02- 06CH11357.
The Advanced Photon Source-Upgrade (APS-U) project has stringent specifications and a 12 month installation schedule. Some form of these constraints appear to be common at all multi-bend achromat upgrade projects. At the APS-U, no full tests will be made of the final accelerator support design. The evaluation of the final design against the specifications will be based primarily on computer simulations using virtual inputs. Insuring that the final designs meet specifications solely based on simulations is much like cooking a complex, multi-course meal without a trial run. Producing a successful meal on the first try requires a prior understanding of the ingre-dients, techniques, and interactions between the constituents. A good cookbook can be essential in providing this under-standing. Likewise, producing an accelerator support final design that meets the requirements requires a prior under-standing of the materials, components, techniques, and interactions between them. This poster describes a cookbook-style approach that any design team can use to confidently predict important characteristics such as natural frequency and ambient vibration response with an error of around 10%.

Poster WEPH22 [0.541 MB]

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WEPH26

High Rigidity Girder System for the Sirius Machine

alignment, damping, storage-ring, experiment

261

M.C. Rocha, P.P.S. Freitas, T. Jasso, R. Junqueira Leão, A.L. Mesa, R.T. Neuenschwander, A.R.D. Rodrigues, F. Rodrigues
LNLS, Campinas, Brazil

Sirius is a 4th generation synchrotron light source under construction in Brazil, with a bare emittance of 250 picometer rad, scheduled to have the first beam late this year. One of the most important aspects for this ultra-low emittance machine is the stability of the components, especially the magnets. This paper describes the main characteristics of the girder system, including the concrete pedestal, the leveling units, the girder itself, the clamping mechanism for the magnets and the measurements procedures. Each detail was considered in the design phase and the result is a high rigidity setup with a first horizontal mode close to 170 Hz.

Poster WEPH26 [1.313 MB]

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WEPH28

A Note of Thermal Analysis in Synchrotron Radiation Accelerator Engineering

radiation, synchrotron-radiation, insertion-device, undulator

264

I.C. Sheng
NSRRC, Hsinchu, Taiwan

Thermal and thermomechanical analysis is one of the key process while designing accelerator components that may subject to synchrotron radiation heating. Even some closed-form solutions are available, and yet as to complex geometry numerical analysis such as finite element method (FEM) is commonly used to obtain the result. However due to its complexity of density distribution of the heat load, implementing such boundary conditions in the FEM model is relatively tedious. In this report we provide a simplified, practical and more conservative method to apply heat load both for bending magnet and insertion device. In addition, a general purpose synchrotron radiation heating numerical modeling is also introduced.

Poster WEPH28 [0.390 MB]

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WEPH31

Optimization Method Using Thermal and Mechanical Simulations for Sirius High-Stability Mirrors

simulation, cryogenics, radiation, photon

273

L.M. Volpe, G.V. Claudiano, R.R. Geraldes, S.A.L. Luiz, A.C. Pinto
LNLS, Campinas, Brazil

Funding: Brazil's Ministry of Science, Technology, Innovation and Communication (MCTIC)
The mirrors for Sirius, the new 4th-generation synchrotron at the Brazilian Synchrotron Light Laboratory (LNLS), have strict requirements regarding thermo-mechanical stability and deformations, with figure height and slope errors limited to a few nanometers and tens of nanoradians, respectively. Therefore, fixed-shape mirrors have been defined with horizontally-reflecting orientation (except for vertically-reflecting mirrors of KB systems), whereas their cooling schemes (namely, air, water or liquid nitrogen cooling) depend on the particular power load. A thermal and mechanical optimization method was developed to guide the design of mirrors through the evaluation of deformations caused by power load, cooling, gravity, tightening of the fastening screws, manufacturing errors and modal analyses. Up to now, this method was already used to define the mirrors of Sirius' beamlines, which include plane, cylindrical, elliptical and ellipsoidal mirrors, as well as KB systems for microprobe and nanoprobe stations. Two examples are presented to illustrate the method.

Poster WEPH31 [1.296 MB]

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WEPH32

DESIGN OF A LAYERED HIGH PRECISION MAGNET GIRDER

collimation, dipole, radiation, synchrotron-radiation

277

G.Y. Wang, L. Kang, J.B. Yu, J.S. Zhang
IHEP, Beijing, People's Republic of China
J.X. Chen
CSNS, Guangdong Province, People's Republic of China

In order to adjust the collimation of the light source magnet, a layered magnet girder is developed, which can adjust the six degrees of freedom accurately and reduce the mutual influence of the adjustment process between the various layers of the girder. The precision of the collimation is up to 5 microns.

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WEPH36

From Plate Screening to Artificial Intelligence: Innovative developments on PROXIMA 2A at Synchrotron SOLEIL

experiment, detector, GUI, instrumentation

283

D. Jeangerard, L. Ciccone, D.K. Desjardins, A. Le Jollec, M. Savko, W. E. Shepard
SOLEIL, Gif-sur-Yvette, France
A. Haouz
Pasteur Institute, Crystallisation and X-ray Diffraction (PF6), Paris, France

PROXIMA 2A is a high performance 3rd generation synchrotron beamline dedicated to X-ray micro-crystallography on biological macromolecules. Since opening in March 2013, the experimental station has hosted a large number of users who have collected vast amounts of X-ray diffraction images from literally thousands of crystals. In order to streamline the throughput, enhance performance and add functionality, a number of innovative developments have been launched on PROXIMA 2A. These cover all aspects of the beamline, from the practical to the visionary: such as the design, fabrication and implementation of a dedicated high-precision motorized stage to screen crystallization plates for in situ X-ray data collections, and the employment artificial intelligence and computer vision technologies for the detection of samples under liquid nitrogen. Other notable beamline projects include the addition of a vertical translation table for the EIGER X 9M detector to permit the acquisition of ultrahigh (0.6 Å) resolution X-ray data, the incorporation of a miniaturized YAG-coupled photodiode within a beamstop and the determination of the SOC of a recently added kappa arm to the goniometer.

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THOAMA01

Optimizing the PETRA IV Girder by Using Bio-Inspired Structures

lattice, radiation, storage-ring, ECR

297

S. Andresen
Alfred-Wegener-Institut, Bremerhaven, Germany

The PETRA IV project at DESY (Deutsches Elektronen Synchrotron) aims at building a unique synchrotron light source to provide beams of hard X-rays with unprecedented coherence properties that can be focused to dimensions in the nanometer-regime. An optimization of the girder structure is necessary to reduce the impact of ambient vibrations on the particle beam. For this purpose, several numerical approaches have been made to simultaneously reach natural frequencies above 50 Hz, a high stiffness and a low mass. In order to define an optimal girder support, a parametric study was conducted varying both the number and location of support points. Based on the resulting arrangement of support points, topology optimizations were performed to achieve a high stiffness and a high first natural frequency. The following transformation of the results into parametric constructions allowed further parametric studies to find optimal geometry parameters leading to the aimed girder properties. In addition to that, bio-inspired structures based on marine organisms were applied to the girder which likewise resulted in improved girder properties.

Slides THOAMA01 [10.895 MB]

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THOPMA01

Piezo Technology in Synchrotron

laser, resonance, vacuum, controls

321

B. Laluc, T. Maillard, A. Riquer
CTEC, MEYLAN, France

Synchrotrons need robust products. That is why the association of piezo actuator technology and CEDRAT TECHNOLOGIES (CTEC) know-how has been successful for synchrotron mechanisms projects. The technological brick is the "Amplified Piezo Actuator" (APA®) tested and widely used in space applications, it is often implemented in CTEC piezo mechanisms and provides a high level of robustness. Modifying the layout and the number of APA® allows several needs to be addressed within beamlines. Three applications developed in collaboration with the EMBL, PAL and SOLEIL will be presented in this paper. The first application consists of cutting a beam with a piezo shutter. The maximum beam diameter is 3 mm. The second mechanism allows the energy of a beam to be modified by using a series of piezo actuated filters. And the last mechanism aims at modifying the beam section shape with an active piezo micro-slits mechanism.
"Synchrotron SOLEIL"
"EMBL ESRF Grenoble"
"www.cedrat-technologies.com"

Slides THOPMA01 [11.933 MB]

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THPH09

Design of Indirect X-Ray Detectors for Tomography on the Anatomix Beamline

detector, experiment, photon, SRF

355

D.K. Desjardins, A.C. Carcy, J.L. Giorgetta, C. Menneglier, M. Scheel, T. Weitkamp
SOLEIL, Gif-sur-Yvette, France

ANATOMIX* is a long beamline for full-field tomography techniques at the French synchrotron SOLEIL [1]. It will operate in the energy range from 5 to 30 keV, and feature several operation modes via versatile optics configurations, including direct white beam propagation. Two methodologically different experimental stations will be used: parallel-beam X-ray shadowgraphy, for spatial resolution down to the sub-micron range, and full-field transmission X-ray microscopy down to a spatial resolution of less than 100 nm. To cover this large panel of experimental possibilities, the Detector Group, the Mechanical Engineering Group and beamline team have designed four dedicated indirect X-ray detector. For pixels in the sub-micron size range : a micro-tomography revolver camera for versatility, a high-efficiency camera for flux-limited experiments, and a high-resolution camera for the largest optical magnifications will be available. For experiments with a large X-ray beam and pixel sizes from several microns upward, a "large-field" camera completes the set. We describe these different assemblies with the detailed components and expected specification of each solution.
* Beamline largely funded by the French National Research Agency through the EQUIPEX investment program, NanoimagesX.
[1] T Weitkamp et al 2017 J. Phys.: Conf. Ser. 849 012037

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THPH12

Granite Benches for Sirius X-ray Optical Systems

alignment, GUI, interface, experiment

361

R.R. Geraldes, C.S.N.C. Bueno, G.V. Claudiano, V.Z. Ferreira, M. Saveri Silva, A. Sikorski, M.S. Souza
LNLS, Campinas, Brazil

Funding: Ministry of Science, Technology, Innovation and Communication (MCTIC)
The first set of Sirius beamlines is expected to start operating in early 2019 and over the last few years many optical systems for the X-ray beamlines have been developed in-house at the Brazilian Synchrotron Light Laboratory (LNLS). Starting with the High-Dynamic Double Crystal Monochromator (HD-DCM), passing by the Double Channel-Cut Monochromator (4CM) and continuing with new standard mirror sys-tems, a series of granite benches, based on high-resolution levellers, and a combination of embedded and commercial air-bearings, has been designed for high mechanical and thermal stability. Specifications, designs, and partial results are presented, showing the progressive increase in complexity according to a deterministic design approach.

Poster THPH12 [3.907 MB]

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THPH16

Compact Mirror Bender With Sub-Nanometer Adaptive Correction Control

optics, controls, focusing, feedback

371

N. Gonzalez, C. Colldelram, J.B. González Fernández, J. Juanhuix, J. Nicolás, C. Ruget
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

Funding: This work is partially funded by MINECO under contract FIS2015-66328-C3-2-R and by ERDF funds.
We present a compact mirror bender with dynamic surface correction. The system is the evolution of an in-house development and will be the default focusing system for the new ALBA beamlines. The bender is now more compact and can introduce stronger curvatures, as required for microfocus applications. It allows for in-situ correction of the mirror surface, with resolution and stability below one nanometer. The bender can compensate parasitic deformations caused by thermal bumps, changes of focus, or stresses appeared during installation or bakeout. The system includes two torque actuators at the ends of the mirror as well as a number of correctors along the mirror length, capable of introducing high order surface corrections. The bending curvature is actively stabilized, by a feedback loop that controls the applied force, to the equivalent of 0.25 nm rms in a 500 mm long mirror. The figure correctors provide up to 20N push-pull force with resolution below .001 N. They combine elastic and magnetic forces to improve their stability.

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THPH18

A Multi-sample Holder for the MSPD Beamline at ALBA

operation, GUI, interface, electronics

377

J.B. González Fernández, F. Farré París, F. Fauth, P. Pedreira, D. Roldán, X. Serra Gallifa
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

At the high resolution powder diffraction end station of the Materials Science and Powder Diffraction (MSPD) beamline at ALBA Synchrotron, several samples are measured on a daily basis. Thus, an automatic sample exchanger is a great asset to the beamline, permitting a more efficient use of beam time. Even if a robot arm is the more suitable option for a sample exchanger device, in terms of cost, compactness and versatility MSPD needs another approach. ALBA engineering division has developed a multi-sample holder that allows the loading of up to eight samples and exchanging between them with a resolution of less than a micron. This new design consists of a customized and motorized linear stage that has been designed to fit into the present three-circles diffractometer, on top of the positioning stages, avoiding any possible collision with the Eulerian cradle. In addition, this new holder permits the use of different types of samples like capillaries in fast spinners, coin cell batteries and electrochemical cells. Finally, the system is compatible with the usual sample conditioning equipment on the end station such as the hot blower, cryostream, beamstop, chiller, etc.

Poster THPH18 [3.052 MB]

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THPH26

Mechanical Conversion of a Vertically Reflecting Artificial Channel-cut Monochromator to Horizontally Reflecting

photon, vacuum, focusing, MMI

391

S.P. Kearney, E.M. Dufresne, S. Narayanan, A. Sandy, D. Shu
ANL, Argonne, Illinois, USA

Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357.
The mechanical conversion of a high-resolution artificial channel-cut monochromator (ACCM) from a vertically reflecting orientation to a horizontally reflecting orientation is presented. The ACCM was originally commissioned for the 8-ID-I beamline at the Advanced Photon Source (APS), Argonne National Laboratory [1, 2]. The ACCM was intentionally designed at commission to have the potential to be reoriented to the horizontal direction. After nearly a decade of operation in the vertical orientation the ACCM was rotated to the horizontal orientation. The details of the design which allowed this conversion and the preparation steps needed to assure the continued performance of the ACCM will be discussed.
* Narayanan, S., et al., J. Synchrotron Radiat. 15(1), 12-18 (2008).
** U.S. Patent granted No. 6,607, 840, D. Shu, T. S. Toellner, and E. E. Alp, 2003.

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THPH32

Dual Beam Visualizer - Intensity Monitor for Lucia Beamline at SOLEIL Synchrotron

photon, diagnostics, radiation, optics

403

C. Menneglier, D.K. Desjardins, V. Pinty, D. Roy, D. Vantelon
SOLEIL, Gif-sur-Yvette, France

LUCIA is a micro-focused beamline (0.8 - 8 keV) dedicated to X-ray fluorescence and X-ray absorption spectroscopy at SOLEIL Synchrotron.* With its recent optical upgrade and photons flux increase, the three pink-beam diagnostics of the beamline have been upgraded to support a beam reaching 10¹³ph/s and 20 W/mm². This paper presents the thermomechanical study and the realization of new devices adapted to the current constraints of use, making possible to both visualize the shape of the pink beam and to measure its intensity simultaneously in the same compact device. The beam is visualized by a piece of Al2O3 - Cr ceramic, soldered to a copper heat sink, whose fluorescence image is visible in visible light with a suitable camera and optical system. The measurement of the photonic intensity is made by a polarized CVD diamond used as a photosensitive element, the current reading is made by a suitable low current amplifier. The design of this dual beam visualizer and intensity monitor, made by the SOLEIL detectors group with thermomechanical studies done by the Mechanical Design Office, will be presented in details. In-lab measurements will be also presented.
* D. Vantelon et al., The LUCIA beamline at SOLEIL, Journal of Synchrotron Radiation, vol 23 (part 2), pp 635-640, March 2016. doi:10.1107/S1600577516000746

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THPH37

MAGSTAT V3: An In-Vacuum Variable-Gap Quadrupole with Rotary Permanent Magnets

quadrupole, vacuum, GUI, permanent-magnet

412

V. Pinty, N. Jaouen, F. Marteau, H. Popescu, P. Prout
SOLEIL, Gif-sur-Yvette, France

MAGSTAT is a quadrupole designed to magnetize samples with a variable magnetic field in flow density and in directions. Four rotary permanent magnets allow the user to specify a direction for the field and changing in situ the gap between the poles drives the field intensity. The first prototype was realized in 2016 on the SEXTANTS beamline in the framework of SOLEIL-MAXIV collaboration; a second version has been manufactured for MAXIV SoftImax beamline. This third version shows a significant evolution of the mechanical design, guaranteeing a much better stiffness in high field configurations. Samples up to Ø74mm can be placed in this quadrupole, and the tiny ones which may fit in a Ø10mm circle or smaller, can be magnetized with a 1T local field. The angle of each magnet is driven by a dedicated stepper motors with a big reduction ratio. The total gap is ensured by a single motor, and its motion is symmetrically transferred to the magnets through an Archimedean spiral. The first prototype is installed at COMET endstation dedicated to the coherent scattering of soft X-ray in transmission for imaging magnetic materials via the Fourier Transform Holography or ptychography techniques.

Poster THPH37 [57.424 MB]

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THPH39

Novel Comprehensive UHV Lens Changer at the PETRA III Beamlines P22, P23 and P24

alignment, vacuum, focusing, GUI

418

J. Raabe, K. Ederer, R. Grifone, D. Novikov, C. Schlüter
DESY, Hamburg, Germany

The design of a compact UHV-compatible X-ray transfocator for beryllium compound refractive lenses (CRL) is presented. CRLs are nowadays commonly applied as focusing elements in a lot of techniques based on synchrotron radiation. Aim of the current project was the development of a low-maintenance lens changer for beam focusing, collimation and aperture matching. The paper describes the new lens changer designs for the reliable use under ultrahigh vacuum conditions. Precise and reproducible alignment is achieved by pneumatic actuators that press the lens stacks against a high precision prism. All actuators and position sensors are placed outside the UHV vessel. Alignment is facilitated by integrated beam monitors and alignment apertures. We discuss two variants of the device, one designed for 2D lenses and the other one operating with 1D lenses. In the current version, the 2D lens changer adapts 12 stacks of up to 8 single lenses each, and the 1D variant ' 8 single lenses or apertures.

Poster THPH39 [0.190 MB]

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THPH40

Training the Next Generation of Engineers for Photon Based Light Sources

ECR, survey, site, electron

421

S.M. Scott
DLS, Oxfordshire, United Kingdom

The continued increase in the number of Light Sources, their beamlines and the need for upgrades of both machine and beamlines requires an ever larger supply of suitably qualified and experienced engineers. If there is a world wide shortage of Engineers where will facilities find these engineers and how can they be trained to the required level? This paper discusses these issues by looking at the growth of demand for engineers within light sources, the evidence of shortages of engineers, the changes in attitudes to work by younger people, the skills necessary, training opportunities and the issues in attracting people into the light sources industry. The paper will also outline the training week for early career engineers delivered at Diamond.

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THPH43

New Holder for Dual-Axis Cryo Soft X-Ray Tomography of Cells at the Mistral Beamline

cryogenics, vacuum, shielding, radiation

427

R. Valcárcel, C. Colldelram, N. Gonzalez, E. Pereiro, A.J. Pérez-Berná, A. Sorrentino
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

A new dual-axis sample holder has been designed and built for the Transmission soft X-ray Microscope (TXM) at the MISTRAL beamline (ALBA Synchrotron) to perform cryo-soft X-ray tomography of cells with dual tilt configuration to reduce the missing wedge. The design, with restricted dimensions Ø7x30mm, enables using commercial Auto-Grid support rings that give rigidity to the sample grid handling. It consists of a guided miniature handle with a spring system that allows sample rotation by 90° around the beam axis inside vacuum and in cryogenic conditions by using the TXM sample loading robot keeping a rotation of ±65° at the sample stage. Two magnets fix the positions at 0° and 90°.The two tilt series can be collected consecutively and the use of Au fiducials permits combining both improving the final quality of the 3D reconstructions. In particular, cellular features hidden due to their orientation with respect to the axis of rotation become visible. The main frame is made in aluminium bronze to enhance the thermal conductivity and in addition, all the pieces have undergone an ion implantation treatment in order to reduce friction and improve the anti-seizure property of the parts.

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FROAMA02

A High Heat Load Double Crystal Monochromator and Its Cryo Cooling System for Heps

ISOL, vacuum, controls, optics

430

H. Liang, L. Gao, Y.C. Jiang, W.F. Sheng, S. Tang, A.Y. Zhou
IHEP, Beijing, People's Republic of China
G. Cao
University of Chinese Academy of Sciences, Beijing, People's Republic of China

A high heat load double crystal monochromator and its cryo cooling system were designed and their prototypes were fabricated for the future HEPS. The mechanical and cooling structure of the DCM are introduced. The FEA results show the DCM is capable of cooling 870 watts of heat load. The cryo cooling system is also introduced. Test results show the pressure stability of the cryo cooling system is less than 2 mbar RMS. Offline heat load test of the DCM were carried out by a ceramic heater attached to the center of the incident surface of the first crystal, and 834 watts heat load were applied by the heater without boiling the liquid nitrogen. Offline absolute vibration measurement of the second crystal assembly was carried out by a laser interferometer under different cryo pump speed, pressure and heat load conditions, to find out the stability performance accordingly. An absolute vibration of 41 nrad RMS was measured, with the pump running at 45Hz, which has a cooling capability of 400 watts.

Slides FROAMA02 [7.370 MB]

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