Keyword: vacuum
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TUOPMA03 Development of the new UE38 Undulator for the Athos Beamline in SwissFEL undulator, FEL, laser, GUI 1
 
  • H. Jöhri, M. Calvi, M. Hindermann, L. Huber, A. Keller, M. Locher, T. Schmidt, X. Wang
    PSI, Villigen PSI, Switzerland
  
  For the next beamline, we will profit from the experience of the U15 undulator development, but there are new requirements, because it will be a polarized undulator with a period of 38mm. We are developing a new arrangement of the drives, a further development of the magnet keepers and a vacuumpipe with only 0.2mm of wall thickness. A rough overview was given at Medsi 2016, together with the talk of the U15 Undulator. Meentime, the UE38 is in production and the talk will present the actual status and the lessons we learned during development and the fabrication: - Realization of vacuumchamber with 0.2mm wall thickness - Supportstructure for the vacuumchamber - Precision of manufacturing - Precision of assembling - Design of Magnetkeeper: Differential screw, forces, stiffness  
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUOPMA03  
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TUOPMA07 RF Fingers for the New ESRF-EBS Storage Ring SRF, impedance, coupling, storage-ring 11
 
  • T. Brochard, P.M. Brumund, L. Goirand, J. Pasquaud, S.M. White
    ESRF, Grenoble, France
  
  In the new ESRF-EBS (Extremely Brilliant Source) storage ring vacuum chambers assembly, with a reduced aperture and the new omega shape, RF fingers are a key component to ensure good vacuum conditions and reach the best possible machine performance. As a result, dedicated efforts were put into producing a more compact more robust more reliable and easier to assemble RF finger design for the new machine. The work was done in parallel on the beam coupling impedance reduction, which have a direct impact on the electron beam lifetime, and on the mechanical aspect with FEA validation and geometry optimization. Many test have been made, in a mechanical laboratory, including high resolution 3D computed tomography images in order to measure the electrical contact, and also in the existing ESRF storage ring with the electron beam, to validate the final design before launching the series production  
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUOPMA07  
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TUOPMA08 Deformable RF Fingers with Axial Extension alignment, operation, GUI, experiment 15
 
  • S.K. Sharma, F.A. DePaola, F.C. Lincoln, J.L. Tuozzolo
    BNL, Upton, Long Island, New York, USA
  
  RF fingers in a bellows assembly provide electrical continuity for the image current between adjacent vacuum chambers. They are required to absorb all misalignments between the two chambers while minimizing abrupt changes in the beam aperture. In addition, during bake-outs of the chambers the fingers are required to accommodate their large thermal expansions. The latter is achieved either by having a sliding-contact finger design or a deformable finger design. In this paper we describe a version of the deformable finger design which permits large compression, significant misalignments and axial extension. A novel method of fingers' fabrication, FE analysis and test results are presented.  
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TUPH01 Installation and Alignment of SESAME Storage Ring storage-ring, alignment, dipole, MMI 20
 
  • T.H. Abu-Hanieh
    SESAME, Allan, Jordan
  
  SESAME (Synchrotron-light for Experimental Science and Applications in the Middle East) is the first international 3rd generation synchrotron light source in the Middle East region. This paper presents the method used for installing the Storage ring girders, magnets, vacuum chambers, straight sections, and how the alignment was done. The Installation have been done in a short time with few staff. It was hard and difficult, but went great. A substantial progress has been made in the design, construction and installation of the SESAME Mechanical Systems. All Storage Ring accelerator systems are ready and commissioned.  
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TUPH03 U15 Design and Construction Progress undulator, permanent-magnet, cryogenics, operation 26
 
  • F. Briquez, C.A. Arrachart, N.B. Baron, P. Berteaud, F. Blache, C.B. Bourgoin, N. Béchu, M.-E. Couprie, J. Da Silva Castro, J.M. Dubuisson, J.P. Duval, C. Herbeaux, F. Lepage, A. Lestrade, F. Marteau, A. Mary, F.M. Michel, S.M. Morand, M.-H. Nguyen, A.R. Rouquié, M. Sebdaoui, G. Sharma, K.T. Tavakoli, M. Tilmont, M. Valléau, M.V. Vandenberghe, J. Vétéran, C. de Oliveira
    SOLEIL, Gif-sur-Yvette, France
  
  A 15 mm period PrFeB Cryogenic Permanent Magnet Undulator (CPMU) is under construction at SOLEIL in the frame of a collaboration with MAXIV, relying on the experience gained from the two PrFeB CPMU already installed at SOLEIL. The improved design includes a magnetic length of 3 m and a minimum gap of 3 mm, leading to a polyvalent device of interest for both synchrotron radiation sources and free electron lasers. A dedicated magnetic measurement bench is also under development to perform measurements at cryogenic temperature, based on the SAFALI system. The designs of both undulator and measurement bench will be explained, the construction progress will be detailed and first results will be given.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH03  
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TUPH04 Progress on the Final Design of the APS-Upgrade Storage Ring Vacuum System storage-ring, photon, interface, electron 30
 
  • J.A. Carter, B. Billett, B. Brajuskovic, M.A. Lale, A. McElderry, J. R. Noonan, M.M. O'Neill, K. Wakefield, D.R. Walters, G.E. Wiemerslage, J. Zientek
    ANL, Argonne, Illinois, USA
  
  Funding: Argonne National Laboratory's work is supported by the U.S. Department of Energy, Office of Science under contract DE-AC02-06CH11357
The final design phase is underway for the APS-Upgrade project's storage ring vacuum system. Many aspects of the design are being worked on to address challenging interfaces and to optimize vacuum system performance. Examples of recent work include updates to ray tracing and vacuum analysis, new developments in vacuum chamber and photon absorber design, and further refinement of vacuum pumping plans to achieve the best possible pressure distributions. Recent R&D work and results from a vacuum system sector mockup have also informed designs and installation plans. An overview of progress in these areas and remaining challenges is pre-sented. 		 
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TUPH05 Design of a Radiation Tolerant, Indexing Profile Monitor for the LCLS Electron Beam electron, optics, radiation, operation 33
 
  • A.G. Cedillos, R.C. Field
    SLAC, Menlo Park, California, USA
  
  Funding: Work was performed in support of the U.S. DOE, Office of Sci-ence, LCLS project, under contract DE-AC02-76SF00515.
The Linac Coherent Light Source (LCLS) electron beam can damage YAG:Ce scintillation screens. After one year of use, the existing profile monitor has diminished fluorescence of the screen. The decrease in performance has resulted in distorted beam images which can com-promise the acquired data. Scheduling a YAG screen replacement is difficult, resulting in weeks of diminished performance. We have developed a unique profile moni-tor that incorporates multiple YAG screens (Ø40 mm, 50 um thick) and methods to reduce device downtime. This device uses unique geometry to direct coherent optical transition radiation (COTR) away from the optical path, which preserves the high resolution beam image. We are presenting the operational requirements, device design and installed device operational results. 		 
poster icon Poster TUPH05 [2.024 MB]  
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TUPH08 Aluminium and Bimetallic Vacuum Chambers for the New ESRF Storage Ring (EBS) SRF, storage-ring, dipole, radiation 36
 
  • F. Cianciosi, P.M. Brumund, L. Goirand
    ESRF, Grenoble, France
  
  The ESRF is proceeding with the design and procurement of its new low emittance storage ring EBS (Extremely Brilliant Source project). This completely new storage ring requires a new vacuum system including UHV chambers with complex shape and strict geometrical and dimensional tolerances. In order to meet these requirements we decided to build about half of the chambers in aluminum alloy machined from the bulk, the only technology permitting to respect the requirements. The result are 128 chambers, 2.5m long, built in alloy 2219 with Conflat flanges custom made from the chamber supplier by explosion bonding. The production phase is nearly finished, the produced chambers satisfy completely the expectations. A second generation of experimental aluminum chambers was designed as a substitution of some steel ones in order to solve same geometrical difficulties. These chambers are very complex as they have steel-aluminum junctions in the body in order to accommodate bellows and beam position monitor buttons. The delivery of the first prototype of this type of chamber is previewed for June 2018.  
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TUPH09 Friction Stir Welding and Copper-Chromium Zirconium: a New Concept for the Design of Sirius' High-Power Absorbers synchrotron, 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 icon Poster TUPH09 [2.987 MB]  
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TUPH10 Interfaces with Operational Systems APS Upgrade Project Removal and Installation controls, interface, storage-ring, monitoring 43
 
  • R.W. Connatser
    ANL, Argonne, Illinois, USA
  
  Funding: Created by UChicago Argonne, LLC, Operator of Argonne National Laboratory. Argonne, a U.S. Department of Energy Office of Science laboratory, is operated under Contract No. DE-AC02-06CH11357.
A critical time for the APS Upgrade Project is the twelve month dark period in which the current accelerator, front ends, and insertion devices will be removed and the new MBA will be installed. In addition to the technical interfaces, there are a significant number of operational support systems and utilities that will be affected. For the dark period to be a success, these additional interfaces need to be described and their interaction with the removal and installation processes defined. This poster describes many of these additional systems and their interfaces. 		 
poster icon Poster TUPH10 [0.354 MB]  
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TUPH12 Multipole Injection Kicker (MIK), a Cooperative Project SOLEIL and MAX IV synchrotron, SRF, 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 icon Poster TUPH12 [4.376 MB]  
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TUPH13 Mechanical Design Challenges Building a Prototype 8-Pole Corrector Magnet quadrupole, alignment, dipole, octupole 50
 
  • F.A. DePaola, R. Faussete, S.K. Sharma, C.J. Spataro
    BNL, Upton, Long Island, New York, USA
  • A.K. Jain, M.S. Jaski
    ANL, Argonne, Illinois, USA
  
  An innovative design was developed for an 8-pole corrector magnet for the APS upgrade program. This is a combined function magnet consisting of horizontal and vertical correctors as well as a skew quadrupole. This paper describes technical challenges presented by both the magnetic design and the interface constraints for the magnet. A prototype magnet was built, and extensive testing on the magnet confirmed that all magnetic and mechanical requirements were achieved. Improvements were identified during the manufacturing and testing of the prototype magnet. The final design of the magnet which has incorporated these improvements is discussed in the paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH13  
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TUPH14 Status of the Conceptual Design of ALS-U lattice, emittance, storage-ring, kicker 53
 
  • C. Steier, A.P. Allézy, A. Anders, K.M. Baptiste, E.S. Buice, K. Chow, G.D. Cutler, S. De Santis, R.J. Donahue, R.M. Duarte, D. Filippetto, J.P. Harkins, T. Hellert, M.J. Johnson, J.-Y. Jung, S.C. Leemann, D. Leitner, M. Leitner, T.H. Luo, H. Nishimura, T. Oliver, O. Omolayo, J.R. Osborn, G.C. Pappas, S. Persichelli, M. Placidi, G.J. Portmann, S. Reyes, D. Robin, F. Sannibale, C. Sun, C.A. Swenson, M. Venturini, S.P. Virostek, W.L. Waldron, E.J. Wallén
    LBNL, Berkeley, California, USA
  
  Funding: This work was supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231
The ALS-U conceptual design promises to deliver diffraction limited performance throughout the soft x-ray range by lowering the horizontal emittance to about 70 pm rad resulting in 2-3 orders of brightness increase for soft x-rays compared to the current ALS. The design utilizes a nine bend achromat lattice, with reverse bending magnets and on-axis swap-out injection utilizing an accumulator ring. This paper shows some aspects of the completed conceptual design of the accelerator, as well as some results of the R&D program that has been ongoing for the last years.
[1] H. Tarawneh et al., J. Phys.: Conf. Ser. 493 012020, 2014.
[2] C. Steier et al., in Proceedings of IPAC2015, 1840, 2015. 		 
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TUPH18 Vacuum Performance Test of CuCrZr Photon Absorbers experiment, simulation, storage-ring, synchrotron 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 icon Poster TUPH18 [0.852 MB]  
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TUPH19 A Mechanical Undulator Frame to Minimize Intrinsic Phase Errors operation, undulator, GUI, permanent-magnet 69
 
  • J.C. Huang, C.H. Chang, C.-S. Hwang, C.S. Yang, C.K. Yang
    NSRRC, Hsinchu, Taiwan
  • H. Kitamura
    RIKEN SPring-8 Center, Sayo-cho, Sayo-gun, Hyogo, Japan
  • S. M. Mizumoto
    NEOMAX Co., Ltd., Mishima-gun, Osaka, Japan
  
  A PrFeB-based cryogenic permanent magnet undu-lator (CPMU) is under construction at the Taiwan Photon Source (TPS) to generate brilliant X-rays. When magnets are cooled to 77 K, a CPMU with a period length of 15 mm can generate an effective magnetic field of 1.32 T in a gap of 4 mm. A main feature of the TPS CPMU is its low-intrinsic-phase errors by the installation of force-compensation modules on the out-of-vacuum girders in a four-support-points configuration. Moreover, adjusting the spring settings one can obtain very low undulator phase errors. In this paper, a mechanical frame design for the TPS-CPMU with force-compensating spring modules will be discussed. Observations of deformation effects of the out-of-vacuum girders on the CPMU will be presented.  
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TUPH25 Morphologies of Oxygen-Free Titanium and Palladium/Titanium Thin Films: New Non-Evaporable Getter (NEG) Coatings electron, interface, site, experiment 84
 
  • T. Miyazawa
    Sokendai, The Graduate University for Advanced Studies, Tsukuba, Japan
  • A.H. Hashimoto, M. Yamanaka
    NIMS, Tsukuba, Ibaraki, Japan
  • T. Kikuchi, K. Mase
    KEK, Tsukuba, Japan
  
  Funding: This research was partly supported by a TIA-Kakehashi grant and by the Global Research Center for Environment and Energy based on Nanomaterials Science.
Non-evaporable getter (NEG) coatings are ideal for maintaining an ultrahigh vacuum (UHV) in the range 10'8 Pa and they are widely used for accelerators because they are oil free, magnetic-field free, vibration free, economical, space saving, and energy efficient. We recently fabricated new NEG coatings consisting of low-oxygen-content Ti or oxygen-free Pd/Ti by sublimation under a clean UHV in the range 10'8 to 10'7 Pa [*]. Here, we report the determination of the morphologies of these films by scanning electron microscopy, transmission electron microscopy, scanning transmission electron microscopy, and energy-dispersive X-ray spectroscopy. The Ti and Pd films had almost uniform thicknesses of about 1.3 'm and 50 nm, respectively, and the Pd film completely overcoated the Ti film. Both the Pd and Ti thin films were uniformly deposited in plane on the stainless steel 304L substrate and they had polycrystalline structures. The interface between the Pd and Ti thin films was not abrupt.
* T. Miyazawa, K. Tobishima, H. Kato, M. Kurihara, S. Ohno, T. Kikuchi, and K. Mase, Vac. Surf. Sci. 61, 227 (2018). 		 
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TUPH27 Structure Design of a Multi-Wire Target target, alignment, controls, neutron 92
 
  • X.J. Nie, H.Y. He, L. Kang, L. Liu, G.Y. Wang, T.G. Xu, D.H. Zhu
    IHEP, Beijing, People's Republic of China
  • J.X. Chen, C.J. Ning, J.L. Sun, A.X. Wang, J.B. Yu, Y.J. Yu, J.S. Zhang
    CSNS, Guangdong Province, People's Republic of China
  
  Introduce a structure design of a Multi-Wire Target. The plan of wire alignment was decided by analysis. The wire tightening device with interlaced alignment was used to solve the wire alignment in narrow space. The vacuum chamber was designed by optimization. The displacement pickup was used to make the movement control of translation stages.  
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TUPH34 The Use of AM Technologies for HV and UHV Components and Vessels detector, operation, cavity, HOM 114
 
  • A. Stallwood, D.J. Butler, G.M.A. Duller
    DLS, Oxfordshire, United Kingdom
  
  AM technology (3D Printing) in plastics and metals has now been in commercial use for over 30 years. However, the application of this technology in vacuum environments has been limited, due to the material porosity and additives used in the manufacturing techniques. This paper reports on the testing and use of FDM (Fused Deposition Modelling) PEEK and DMLS (Direct Metal Laser Sintering) metal components inside a UHV environment. Specifically covering the use of DMLS to successfully produce a complex vacuum vessel operating at 10-6 mbar, as used on the new VMXm beamline at Diamond Light Source. Vacuum testing the vessel has demonstrated that this manufacturing technique has the potential to produce vessels that are capable of holding 10-10mbar.  
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TUPH35 Stainless Steel Vacuum Chambers for the EBS Storage Ring SRF, storage-ring, synchrotron, 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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TUPH36 Metal 3D Additive Machining for in-Vacuum Beam Instrumentation instrumentation, proton, ISOL, operation 121
 
  • R. Veness, W. Andreazza, D. Gudkov, A. Miarnau Marin, S. Samuelsson
    CERN, Geneva, Switzerland
  
  3D additive machining by selective laser melting (SLM) has great potential for widespread use in the field of accelerator instrumentation. However, as with any new process or material, it must be adapted and qualified for use in the specific in-vacuum accelerator environment. This paper outlines recent developments of this technology for beam instrumentation in CERN accelerators. It covers topological optimisation, design and production methods for SLM, validation and test of samples and components to qualify the production process. It also reports on experience of operation in multiple machines with beam.  
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TUPH37 A New Sealing Technology for High Precision Wide Open UHV Vacuum Flange and Waveguide Connections With Metal Gaskets FEL, diagnostics, laser, beam-diagnostic 125
 
  • S. Vilcins, M. Holz
    DESY, Hamburg, Germany
  • D.B. Bandke
    DESY Zeuthen, Zeuthen, Germany
  
  The European-XFEL X-Ray laser facility is located in Hamburg. Since its commissioning in September 2017, this large X-ray laser opens new research opportunities for industrial users and scientists. For many beam diagnostic devices ultra-high vacuum components with high mechanical precision and additional strict requirements on particle cleanliness were produced. A vacuum chamber for the bunch compressor (BC) with a cross section of 400 mm*40.5 mm made of stainless steel blocks 1.4429 (316 LN) has been installed. These chambers have inte-grated flange-connections for large VATSEAL® gaskets. The tolerances for these flanges are extremely tight to ensure save vacuum tight sealing. This contribution will report of a new technology for such large rectangular or other large flange surfaces. Furthermore this contribution will compare the present with this new technology. This new technology can be used as well for other vacuum flange metals like alumini-um or titanium. Using of this technology for applications under special conditions, like particle free applications due to the non-lubricated conditions, are conceivable.  
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WEOAMA01 The Status of the New High-Dynamic DCM for Sirius controls, operation, synchrotron, 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 icon Slides WEOAMA01 [7.575 MB]  
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WEOAMA04 The Design of Exactly-Constrained X-Ray Mirror Systems for Sirius alignment, operation, coupling, feedback 173
 
  • R.R. Geraldes, G.V. Claudiano, V.Z. Ferreira, L. Sanfelici, A. Sikorski, M.S. Souza, H.C.N. Tolentino, L.M. Volpe, H. Westfahl Jr.
    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. Regarding X-ray mirror sys-tems, a single design concept has been possible thanks to the standardization of side-bounce fixed-shape mirrors. To preserve the extreme quality of both the mirror figures and the source, the main design targets were minimizing mechanical and thermal distortions in the mirrors while maximizing mechanical and thermal stabilities. A deterministic high-resolution exactly-constrained flexure-based mirror support provides pitch tuning within 100 nrad and resonances above 150 Hz, while dealing with clamping and thermal ex-pansion effects. The adopted cooling strategy was indirect cryocooling via cryostats, drastically minimiz-ing thermal gradients and distortions in the mirrors, decoupling vibration sources and simplifying cooling circuits. Finally, a 5-degree-of-freedom granite bench, based on high-resolution levellers and air-bearing solutions, support the vacuum chamber, on which the internal mechanics is stiffly mounted. The specifica-tions, design and partial results are presented. 		 
slides icon Slides WEOAMA04 [6.607 MB]  
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WEPH03 Design of New Beam Instrumentation for the ISOLDE Isotope Separator at CERN ISOL, instrumentation, electronics, electron 205
 
  • W. Andreazza, M. Duraffourg, G.J. Focker, A. Miarnau Marin, D. Smakulska, J. Tassan-Viol, R. Veness
    CERN, Geneva, Switzerland
  
  The ISOLDE radioactive ion beam separator facility at CERN produces beams of short-lived isotopes for experiments in physics, material and medical science. New requirements for more precise measurement of profile, position and intensity has pushed the CERN beam instrumentation group to start the study of a new generation of ISOLDE beam instrumentation dedicated to the specific needs of this facility. This paper will describe the design and the development of a number of new ISOLDE instruments with the aim of achieving better performance, increased reliability and to facilitate maintenance in the radioactive environment. It will explain how modern technologies (i.e. magnetically coupled push pull, 3D additive machining) have been used to make a modern, precise and reliable beam instrumentation design.  
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WEPH23 FEA Simulations of the Aluminium Vacuum Chamber for LOREA Insertion Device at ALBA Synchrotron Light Source radiation, distributed, alignment, dipole 255
 
  • M. Quispe, A.A. Gevorgyan
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  For LOREA, the new beamline at ALBA, the Insertion Device Apple-II helical out-vacuum undulator requires the installation of a suitable narrow-gap aluminium chamber. The chamber design is based on the standard ALBA aluminium chamber which has an internal elliptical cross section, where NEG coating is deposited and bending magnet (BM) radiation from the upstream dipole is dissipated on the chamber walls. For the standard chamber the upstream distributed absorber cannot protect the entire chamber from direct BM radiation because there is a limitation for its design: the beam impedance of the machine. Based on new studies of collective effects it has been concluded that it's possible to implement modifications on the upstream distributed absorber and protect the chamber from lateral collision of BM radiation keeping the beam impedance of the machine inside of a safe range. In spite of that still there is a contribution of the tails of BM radiation. In this paper we describe the behavior of the new aluminium vacuum chamber for different thermal load conditions using water and air for refrigeration. Also we present the design of the modified OFHC upstream distributed absorber.  
poster icon Poster WEPH23 [0.609 MB]  
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WEPH24 Design of an Integrated Crotch Absorber for ALBA Synchrotron Light Source radiation, dipole, photon, undulator 258
 
  • M. Quispe, J. Campmany, A.A. Gevorgyan, J. Marcos
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  This paper presents the design of an Integrated Crotch Absorber for the new beamline LOREA (Low-Energy Ultra-High-Resolution Angular Photoemission for Complex Materials at ALBA). The LOREA Insertion Device (ID) consists of an Apple II undulator with a period of 125 mm. For the current ALBA dipole chamber the ID vertical polarized light hits the upper and lower walls because of the very narrow vertical aperture between the cooling channels. To solve this problem some modifications must be implemented both in the dipole chamber and in the crotch absorber located inside of the dipole. The new crotch absorber, named Integrated Crotch Absorber, must absorb a significant part of the ID vertical polarized light in order to avoid radiation impinging at the post dipole chamber. The geometry of the Integrated Crotch Absorber is a combination of the conventional crotch and the distributed absorber done at PSI for ANKA. The design has been optimized taking into account the standard thermo-mechanical design criteria as well as the reflective effects of the ID radiation from the opening towards the walls of the dipole chamber.  
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WEPH38 Mechanical Design and Construction of the Coherent X-ray Scattering Beamline at Taiwan Photon Source radiation, photon, focusing, scattering 286
 
  • H.Y. Yan, C.Y. Chang, C.H. Chang, S.H. Chang, C.Y. Chen, C.C. Chiu, L. Huang, Y.-S. Huang, L. Lee, J.M. Lin, D.G. Liu
    NSRRC, Hsinchu, Taiwan
  
  The Coherent X-ray Scattering (CXS) beamline at Taiwan Photon Source has been completely constructed in the end of 2015 and opened for users in the next half year of 2016 successfully. Two In-vacuum Undulators (IU22) with lengths of 3 m and 2 m were used as the Insertion Device (ID) to provide intense synchrotron radiation for the CXS beamline. To achieve the coherent performance, the setup of components in the beamline needs to be considered and designed carefully. As no white-beam diamond window was installed in the upstream beamline for the maintenance of coherent beam, a differential pumping mechanism was evaluated to prevent the worse vacuum condition influencing the front end and the storage ring. A single-crystal diamond filter was also adopted to maintain the coherence of x-ray. The protection of bremsstrahlung radiation for this beamline was designed specifically based on the optical layout. This paper will introduce the detailed mechanical design and current status for the CXS beamline.  
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WEPH39 Validation Results for Sirius APU19 Front End Prototype photon, simulation, MMI, undulator 290
 
  • H.G.P. de Oliveira, L.C. Arruda, C.S.N.C. Bueno, H.F. Canova, P.T. Fonseca, G.L.M.P. Rodrigues, L. Sanfelici, L.M. Volpe
    LNLS, Campinas, Brazil
  
  Funding: Ministry of Science, Technology, Innovation and Communication (MCTIC)
A Front End (FE) prototype for a 19-mm period length Adjustable Phase Undulator (APU19) beamline of the new Brazilian 4th-generation synchrotron, Sirius, was assembled in the LNLS metrology building in January 2017 to validate main design concepts. Regarding stability, flow-induced vibration (FIV) investigations were carried out on the water-cooled components, and modal analyses were made on the X-Ray Beam Position Monitor (XBPM) support. As for the vacuum system, final pressure levels were investigated and a vacuum breach was intentionally provoked to verify the performance of the equipment protection system (EPS). In addition, cycling tests of the Photon and Gamma shutters were conducted to verify the FE reliability. Moreover, the three-layer protection system, developed to limit the maximum aperture for the high-power slits, was functionally evaluated. Finally, the results were used to improve the FE to its final design. This paper describes the tests setups and results obtained during the validations. 		 
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WEPH41 The Detector Adjustment System of Taiwan Photon Source 24A detector, GUI, alignment, photon 294
 
  • B.Y. Chen, M. Y. Hsu, L. Lai, X. Y. Li, D.-J. Wang, G.C. Yin
    NSRRC, Hsinchu, Taiwan
  
  The soft X-ray tomography endstation of TPS has the ability to provide 3D biological cell images by fluores-cence structured-illumination microscopy (SIM) and soft x-ray tomography (SXT). The electron energy is design to be in the range of 200 eV to 3 keV. The detector system equipped with an Andor® iKon-L Series imaging CCD, X-Z-roll-pitch adjustment stage, and long stroke bellows system. The detector system can adjust the CCD about 10 mm in both X and Z direction, and ±5 degree of roll. Moreover, the long stroke bellows system gives the CCD an extra degree of freedom in the Y direction and its range is up to 2500 mm. That can locate the CCD close to the sample to get a larger field of view, and far from the sample to get higher image resolution. In this study, the design and commission status of the detector system is studied and the mechanical structures are also presented.
soft X-ray tomography, Detector system 		 
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THOAMA05 3D Numerical Ray Tracing for the APS-Upgrade Storage Ring Vacuum System Design storage-ring, lattice, photon, radiation 312
 
  • J.A. Carter
    ANL, Argonne, Illinois, USA
  
  Funding: Argonne National Laboratory's work is supported by the U.S. Department of Energy, Office of Science under contract DE-AC02-06CH11357
The APS-Upgrade project will build a diffraction lim-ited storage ring requiring a vacuum system design with small aperture vacuum chambers passing through narrow magnet poles. The small apertures dictate that the walls of the vacuum chambers act as distributed photon ab-sorbers. The vacuum chambers must be designed robustly so a thorough understanding of the synchrotron ray trac-ing with beam missteering is required. A MatLab program has been developed to investigate 3D ray tracing with beam missteering. The program dis-cretizes local phase spaces of deviation possibilities along the beam path in both the horizontal and vertical planes of motion and then projects rays within a 3D mod-el of the vacuum system. The 3D model contains ele-ments in sequence along the beam path which represent both chamber segments and photon absorbers. Ray strikes are evaluated for multiple worst-case criteria such as local power intensity or strike offset from cooling channels. The worst case results are plotted and used as boundary conditions for vacuum chamber ther-mal/structural analyses. The results have also helped inform decisions about practical beam position limits. 		 
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THOPMA01 Piezo Technology in Synchrotron synchrotron, laser, resonance, 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" 		 
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THOPMA02 Beamline Engineering Overview for the APS Upgrade photon, storage-ring, optics, brightness 324
 
  • O.A. Schmidt, E. Benda, D. Capatina, T.K. Clute, J.T. Collins, M. Erdmann, T. Graber, D. Haeffner, Y. Jaski, J.J. Knopp, G. Navrotski, R. Winarski
    ANL, Argonne, Illinois, USA
  
  Funding: US Department of Energy, University of Chicago LLC
The Advanced Photon Source (APS) is currently in the process of upgrading to a 4th generation high-energy light source. A new multi-bend achromat storage ring will provide increased brightness and an orders-of-magnitude improvement in coherent flux over the current facility. To take advantage of these new capabilities, we will be building nine new feature beamlines and implementing numerous additional beamline enhancements, all while ensuring the compatibility of existing programs. Clear challenges exist in advancing state-of-the-art optics and developing nano-resolution instrumentation. We also need to recognize and address project scheduling, labor resources, existing infrastructure, bending magnet param-eters, and possible modifications to radiation shielding in order to achieve project success.
Sub Classification should be something like General Beamline Design but option not available. 		 
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THOPMA06 Development of Low Vibration Cooling Systems for Beamline Optics Using Heat Pipe Technology operation, coupling, laser, ion-effects 331
 
  • J.R. Nasiatka, O. Omolayo, H.A. Padmore, S.S. Soezeri
    LBNL, Berkeley, California, USA
  
  Funding: This research used resources of the Advanced Light Source, which is a DOE Office of Science User Facility under contract no. DE-AC02-05CH11231.
Cooling of in-vacuum beamline components has always been problematic. Water cooling lines can transfer vibrations to critical components, and often require complex air guarding systems to ensure that the vacuum envelope is not breached in the event of a leak. These constraints increase design complexity, limit options, and provide challenges for assembly and maintenance. Commercial heat pipes are inexpensive and readily available. Custom assemblies can be fabricated into vacuum flanges and may use non-water based cooling mediums if required. A mockup of an optical assembly has been used to explore vibration reduction and cooling capacity. Other example beamline components such as a heat generating electromagnetic shutter demonstrate the cooling capability of these heat pipes. 		 
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THPH04 Fast X-Ray Beam Intensity Stabilization for Absorption Spectroscopy and Spectromicroscopic Imaging controls, focusing, feedback, photon 343
 
  • M. Birri, D. Ferreira Sanchez, D. Grolimund, B. Meyer, V.A. Samson
    PSI, Villigen PSI, Switzerland
  
  The characteristics of synchrotron sources and beamline optics commonly result in systematic and random variations of the delivered photon flux. In X-ray absorption based measurements, for example, monochromator glitches [1] or the energy dependent gap size of small gap in-vacuum undulators [2] are intrinsic sources for changes in the intensity of the incoming photon flux (I0), however many types of x-ray experiments would benefit from a constant I0. Monochromator Stabilization (MOSTAB) is a common solution for most synchrotron beamlines with double crystal monochromators. This approach is based on the relative alignment of the two monochromator crystals (dynamic detuning) to stabilize beam intensity or position. Obviously, any change in angular alignment of the monochromator crystals will also induce deviations in the beam trajectory and photon energy distribution. At the microXAS undulator beamline of the SLS, we have implemented a system to achieve a constant I0. Two wedge-shaped absorbers produce a spatially uniform attenuation preserving the beam shape without introducing changes in its trajectory. Hardware, control loop and system performance will be presented.
[1] F.Bridges, Nuclear Instruments and Methods in Physics Research A257 (1987) 447-450.
[2] H.Kitamura, J.Synchrotron Rad. 7 (2000), 121-130.
 		 
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THPH05 An Improved Polarisation Analyser for the I16 Beamline at Diamond detector, polarization, scattering, factory 346
 
  • M.H. Burt, S.P. Collins, S. Green, I. Horswell, J. Li, G. Nisbet, R. Pocock, J. Spiers, K.G. Wilkinson
    DLS, Oxfordshire, United Kingdom
  
  The project to upgrade the I16 polarisation analyser was necessary to increase its functionality and to introduce a more robust construction. The requirement that the analyser was to be mounted on a diffractometer meant the construction needed to be as lightweight and as compact as possible. This provided opportunities to explore new collaborative ways of working with both in-house and external suppliers. The paper describes the approach taken to develop lightweight aluminium vacuum chambers working with a company specialising in additive layer manufacturing. In addition, the design of lightweight and compact slit assemblies are detailed; these were developed in collaboration with a supplier of driven linear stages. A novel requirement for the analyser is to have a detector mounted on a rotation axis in vacuum. The results of working with the in-house detector group to develop a design to with all the necessary thermal and electrical connections are described. The paper also describes further use of additive layer manufacturing to produce prototypes that allows the design of a cable management system to be optimised where previously using 3d CAD models had proved unsatisfactory.  
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THPH06 TMO - a New Soft X-Ray Beamline at LCLS II laser, experiment, optics, diagnostics 349
 
  • J.C. Castagna, L. Amores, M. R. Holmes, J.H. James, T.O. Osipov, P. Walter
    SLAC, Menlo Park, California, USA
  
  LCLS is building 4 new soft X-ray beamlines with the LCLS-II upgrade. The TMO (Time resolved Molecular Optical science) beamline aka NEH 1.1 will support many ex-perimental techniques not currently available at LCLS. The beamline hinges around 2 main end stations, LAMP a multi configurable end station and DREAM, dedicated to COLTRIM type of experimentation. Both the existing LAMP as well as the newly built DREAM end-station will be configured to take full advantage of both the high per pulse energy from the copper accelerator (120 Hz) as well as high average intensity and high repetition rate (up to 100 kHz) from the superconducting accelera-tor. Each end station will have its own focusing optic systems (KB Mirrors) which can focus the beam down to 300 nm, and have laser pump probe experiments capability. Very demanding requirements for IR and X-ray overlap as well as beam stability, make the TMO beamline a major engineering challenge. The main components of the beamline (KB optics, DREAM end stations and diagnostics components) are built on granite stands. The building struc-ture is being reviewed for thermal stability. First light on TMO is expected in February 2020  
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THPH14 Beam Conditioning Optics at the ALBA NCD-SWEET Beamline optics, diagnostics, focusing, alignment 365
 
  • N. Gonzalez, C. Colldelram, S. Ferrer, A. Fontserè Recuenco, J.B. González Fernández, G. Jover-Mañas, C. Kamma-Lorger, J. Ladrera Fernández, M.L. Llonch, M. Malfois, J.C. Martínez Guil, I. Sics
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  The SAXS/WAXS Experimental End Station beamline (NCD-SWEET) at ALBA Synchrotron has undergone a major upgrade in the optics and the end station to perform state-of-the-art SAXS/WAXS experiments. In order to reduce X-ray parasitic scattering with air and maximize the photon flux at the sample, an optimized beam conditioning optics has been designed and built in the end station, integrating previously used and new components in vacuum. The beam conditioning optics includes a fast shutter, a set of commercial guard slits and a diagnostic unit com-prising three filters and a four-quadrant transmissive photodiode. In addition, a set of refractive beryllium lenses allowsμfocusing of the beam. The lens system can be removed from the beam path remotely. Finally, an on axis sample viewing system, with a novel design based on an in-vacuum camera mirror and a mica window minimizes the beam path in air up to the sample. To facilitate the alignment of the elements with respect to the beam, all the subsystems are supported by a high-stability granite table with 4 degrees of freedom and sub-micron resolution.  
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THPH15 A New High Precision, Fully Motorized 6-DoF Sample Stage for the ALBA PEEM Endstation GUI, controls, resonance, feedback 368
 
  • N. Gonzalez, L. Aballe, A. Carballedo, C. Colldelram, M. Foerster
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  A new 6-DOF sample manipulator has been designed for the ALBA Synchrotron PhotoEmission Electron Microscopy (PEEM) experimental station, based on a commercial Elmitec LEEM 3. The new design includes full motorization of all 6 axes with position feedback, no backlash, and maximized stability, crucial to achieve the best spatial resolution of down to 8 nm (in so-called LEEM mode). The in-plane longitudinal and transversal motions with sub-micron resolution are based on high precision linear guides, while the pitch and roll stages (sample tilt), guided by angular guides, are actuated by a double-flexure system, which enhances the overall rigidity of the system. The vertical stage is composed by a high rigidity recirculating roller screw and cross roller guides. Finally, 360° yaw rotation is supplied by a differentially pumped commercial rotary stage. On top of the stage, the sample support is mounted on a customized DN63CF flange. This support keeps the original functionalities of the sample manipulator and holders, with 6 independent electrical contacts, and the possibility to heat the sample up to 2000 K and cool it to 100 K with an improved liquid nitrogen cooling system.  
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THPH21 DREAM - A New Soft X-ray (Dynamic REAction Microscopy) COLTRIMS Endstation at LCLS-II laser, optics, diagnostics, coupling 382
 
  • M. R. Holmes, L. Amores, J.C. Castagna, J.H. James, T. Osipov, P. Walter
    SLAC, Menlo Park, California, USA
  
  SLAC is building new soft X-ray beamlines to take advantage of the LCLS-II upgrade to 1 MHz. One of the new beamlines is called TMO (Time resolved Molecular Optical science) also known as NEH 1.1. It will be a soft X-ray beamline featuring a sub-micron X-ray focus at its second, most downstream interaction region where the DREAM COLTRIMS (COld Target Recoil Ion Momentum Spectroscopy) endstation will be situated. DREAM will feature; large magnetic coils to provide a strong uniform magnetic field through the spectrometer, rigid in-vacuum laser in- & out-coupling optics decoupled from the chamber support stand for pump-probe experiments, a multi-stage differentially pumped gas jet with catcher, insertable diagnostics, a long-distance microscope, scatter slits, a steerable gas jet, jet slits, and an adjustable stand to bias the spectrometer off-center from the interaction region. In order to achieve a spot overlap spec of 0.5 um; the KB mirrors, laser optics, & beam position diagnostics all sit on a common granite support structure to minimize mechanical vibrations and thermal drifts. An in-vacuum UHV hexapod will be utilized for fine positioning of the laser in-coupling optic.  
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THPH26 Mechanical Conversion of a Vertically Reflecting Artificial Channel-cut Monochromator to Horizontally Reflecting photon, focusing, synchrotron, 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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THPH28 The Development of PAL-XFEL Beamline FEL, experiment, detector, electron 397
 
  • S.H. Kim, I. Eom, S-M. Hwang, H.J. Hyun, K.S. Kim, M-J. Kim, S. Kim, S.N. Kim, S. Kim, C. Lee, G.S. Park, J. Park, J.K. Park, S.Y. Rah
    PAL, Pohang, Republic of Korea
  
  Pohang Accelerator Laboratory X-ray Free Electron Laser(PAL-XFEL) is a research facility, which is designed to generate extremely intense (assuming 1x1012 photon/pulse at 12.4 keV) and ultra-short (10-200 femtosecond) pulsed X-rays. Now two beamlines were constructed, the one is hard X-ray and the other is soft X-ray. The beamline is consist of UH (Undulator hall) and OH (Optical hall), EH (Experimental hall). The UH is usually the same as the front end of a beamline, and OH has the same function as PTL (Photon Transfer Line). We have two hutches including HXPP and HCXI in hard X-ray beamline. The two hutches are connected each other, and sharing main optics (Mirrors and DCM, etc). PAL-XFEL is a very precise facility and has very large heat power, so thermal and structural analysis as well as vibration analysis is essential. Now many vacuum components of beamline were installed and completed the test of performance.  
poster icon Poster THPH28 [1.888 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH28  
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THPH31 Design of a flexible RIXS Setup detector, alignment, experiment, photon 400
 
  • D. Meissner, S. Adler, M. Beye, A. Bühner, H. Krüger, R. Platzer, T. Reuss, M. Röhling, E. Saemann, E. Saithong
    DESY, Hamburg, Germany
  
  We present a new mechanical design for a RIXS experiment setup consisting of a sample environment vacuum chamber and corresponding spectrometer. It allows variable beam incidence angles to the sample as well as observation angles of the spectrometer. The dispersive element of the spectrometer can be aligned in five DOF by motors inside the UHV chamber. The alignment of the CCD detector can be adjusted independently in the lateral and longitudinal position as well as incidence angle. In combination with a tiltable detector chamber this design allows for multiple observation methods, not limited to variable energies but also for use of different optics or direct observations of the sample.  
poster icon Poster THPH31 [0.859 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH31  
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THPH33 Direct LN2 Cooled Double Crystal Monochromator cryogenics, wiggler, radiation, damping 406
 
  • T. Mochizuki, K. Akiyama, K. Endo, H. Hara, T. Ohsawa, J. Sonoyama, T. Tachibana, H. Takenaga, K. Tsubota
    TOYAMA Co., Ltd., Kanazawa, Japan
  • K. Attenkofer, E. Stavitski
    BNL, Upton, Long Island, New York, USA
  
  A liquid-nitrogen-cooled (LN) X-ray double crystal monochromator has been designed and built for the high power load damping wiggler beamline of the NSLS2. It was designed as the direct LN first crystal to dissipate the max heat load of 2 kW and the second is in-direct-braid LN. It is designed to operate for beam energy 5 to 36 keV with fixed exit beam mode, and for QEXAFS compatible with channel cut mode. It is designed to rotate the Bragg axis with using AC servo motor and achieve up to 10 Hz scan.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH33  
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THPH37 MAGSTAT V3: An In-Vacuum Variable-Gap Quadrupole with Rotary Permanent Magnets quadrupole, GUI, synchrotron, 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 icon Poster THPH37 [57.424 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH37  
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THPH38 Design & Development of an Innovative 6 Axis Sample Manipulator. experiment, FEL, shielding, ISOL 415
 
  • M.F. Purling
    DLS, Oxfordshire, United Kingdom
  
  The accurate positioning & alignment of sample specimens within the experimental test chamber on a beam line is always a challenge. The ability to move in any direction and angle to very precise increments with repeatable positioning is crucial for being able to focus on the exact part of the sample required in the correct orientation. It can be made even more difficult when the sample is required to work within the UHV vacuum environment and be cooled to cryogenic temperatures. Initially in conjunction with St Andrews University, Diamond Light Source Ltd. have been developing their own manipulator for this purpose, it has six degrees of freedom for alignment of the sample and easy remote sample plate loading via a transfer arm system. This paper describes the developments made from the initial design to working manipulators with increased functionality for bespoke requirements on four different beamline within Diamond.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH38  
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THPH39 Novel Comprehensive UHV Lens Changer at the PETRA III Beamlines P22, P23 and P24 alignment, synchrotron, 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 icon Poster THPH39 [0.190 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH39  
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THPH41 Frontend Slits for Closely-Spaced Wiggler Beams wiggler, operation, controls, scattering 424
 
  • S.K. Sharma, C. Amundsen, F.A. DePaola, J.L. Tuozzolo
    BNL, Upton, Long Island, New York, USA
  
  A high energy x-ray (HEX) beamline facility will be constructed at NSLS-II for R&D in energy storage tech-nologies using different x-ray imaging techniques. A 4.3 Tesla superconducting wiggler will be used to produced x-rays of total power of approximately 56 kW in 8 keV ' 200 keV range. The nominal horizontal fan of ~ 10 mrad will be split into three closely spaced beams of 0.2 mrad, 1.0 mrad and 0.2 mrad fans. Each beam is required to have a frontend slit with four distinct apertures. The conventional L-shape design of the slit is not feasible for these closely spaced beams because of constraints on side cooling and horizontal travel of the slits. In this paper we propose two solutions for these slits using a beam pass-through design, vertical-only travel and optimized cooling configurations.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH41  
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THPH43 New Holder for Dual-Axis Cryo Soft X-Ray Tomography of Cells at the Mistral Beamline cryogenics, synchrotron, 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.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH43  
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FROAMA02 A High Heat Load Double Crystal Monochromator and Its Cryo Cooling System for Heps ISOL, controls, optics, synchrotron 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 icon Slides FROAMA02 [7.370 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-FROAMA02  
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FROAMA07 ESRF Double Crystal Monochromator Prototype Project SRF, controls, radiation, GUI 440
 
  • R. Baker, D. Baboulin, R. Barrett, P. Bernard, G. Berruyer, J. Bonnefoy, M. Brendike, P.M. Brumund, Y. Dabin, L. Ducotté, H. Gonzalez, G. Malandrino, P. Marion, O. Mathon, T. Roth, R. Tucoulou
    ESRF, Grenoble, France
  
  Spectroscopy beamlines at the ESRF are equipped with a generic model of double crystal monochromator, originally acquired in the 1990's. After over 15 years of continuous service, their conception, although pioneering 20 years ago, can no longer meet the challenge of present and future scientific goals in terms of position and angular stability, thermal stability, cooling system, vibration, control and feedback, particularly in view of the ESRF - EBS upgrade. Considering the above issues, a feasibility phase was launched to develop a prototype DCM dedicated to future spectroscopy applications at the ESRF. Specifications : derived from expected performance of the EBS upgrade and scientific objectives - are extremely challenging, especially in terms of mechanical and thermal stability and impose the adoption of several innovative design strategies. The prototype is currently in the assembly phase and tests of the complete system are planned before the end of 2018. An overview of the DCM prototype project will be given, including specifications, major design options implemented and various validated concepts. Current project status and first test results will also be presented.  
slides icon Slides FROAMA07 [24.528 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-FROAMA07  
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