MEDSI2018 - List of Keywords (operation)

Paper	Title	Other Keywords	Page
TUOPMA04	Apple II Insertion Devices Made at MAXIV	undulator, MMI, alignment, polarization	6
	A. Thiel, M. Ebbeni, H. Tarawneh MAX IV Laboratory, Lund University, Lund, Sweden
	At present five Apple II insertion devices were made and installed at MAX IV, three of them in the 1.5GeV-ring, and two in the 3GeV-ring. The assembly of the last one of a total number of six Apple II undulators made at MAX IV is currently going on. The undulators have period lengths of 48mm (two devices), 53mm, 58mm, 84mm and 95.2mm. The operational gap range of the 3GeV devices is between 11mm and 150mm, the range of the 1.5GeV devices is 14mm to 150mm. Structural analysis was applied to assure a minimum deflection of the main frame and the magnet array girders. The main frame is made of nodular cast iron, while the girders are made of aluminium alloy. In order to optimize the magnetic tuning the position of the magnet keepers can be adjusted by wedges. The undulators were fiducialized before the installation in the ring tunnel and were aligned in the straight section using their magnetic centre as reference. All MAX IV made undulators have three feet with vertical adjustment and separate horizontal adjusters. This paper describes the design, assembly, shimming and installation of the MAX IV Apple II devices in more detail.
	Slides TUOPMA04 [12.328 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUOPMA04
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TUOPMA08	Deformable RF Fingers with Axial Extension	vacuum, alignment, 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.
	Slides TUOPMA08 [9.954 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUOPMA08
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TUPH03	U15 Design and Construction Progress	undulator, vacuum, permanent-magnet, cryogenics	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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TUPH05	Design of a Radiation Tolerant, Indexing Profile Monitor for the LCLS Electron Beam	electron, optics, radiation, vacuum	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 TUPH05 [2.024 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH05
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TUPH09	Friction Stir Welding and Copper-Chromium Zirconium: a New Concept for the Design of Sirius' High-Power Absorbers	vacuum, synchrotron, alignment, 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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TUPH11	Retractable Absorber (Mask) and White Beam Imager Diagnostic for Canted Straight Section	insertion, photon, radiation, alignment	45
	J. Da Silva Castro, N. Béchu, C. Herbeaux, N. Hubert, N. Jobert, M. Labat, F. Lepage, A. Mary, K.T. Tavakoli SOLEIL, Gif-sur-Yvette, France
	At the SOLEIL synchrotron, as in other accelerators, two canted sources can coexist on the same straight section for space and economic reasons. For its two long beamlines (ANATOMIX source upstream and NANOSCOPIUM source downstream) SOLEIL has made the choice to equip one of his long straight section with two canted insertion devices capable to operate simultaneously. That implies to take into account the degradation risk management of equipment, due to radiation. As the beam power deposition from the upstream undulator can seriously degrade the downstream one, or even other equipment. To handle these risks, Soleil first designed and installed in 2016 a retractable vertical absorber between both insertions to protect the downstream source from the upstream one. In 2017, Soleil then designed and installed a white beam imager, redundant an existing photon beam monitor (XBPM), to verify the correct positioning / alignment of equipment and beams relative to each other. For the vertical absorber as for the white beam imager Soleil had to meet some interesting technological and manufacturing aspects that we propose to present in a poster.
	Poster TUPH11 [3.744 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH11
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TUPH19	A Mechanical Undulator Frame to Minimize Intrinsic Phase Errors	vacuum, 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.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH19
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TUPH22	Study on Cooling Technology of the Superconducting Undulator at SSRF	cryogenics, SRF, radiation, undulator	75
	Y. Liu, S. Sun, J. Wang, L. Wang, S.H. Wang SINAP, Shanghai, People's Republic of China
	A superconducting undulator (SCU) prototpye with the period of 16 mm and the magnetic gap of 9.5 mm has been designed and fabricated at the Shanghai Institute of Applied Physics(SINAP) since late 2013. A set of cooling system is designed to cool down cold masses. This paper presents the details of their design, calculation and test: 4 small cryogenic refrigerators are used as cold sources, and the superconducting coil and beam pipe are independently cooled down; The 4.2 K superconducting coil is mainly cooled by the liquid helium tube of the thermosyphon loop with evaporation and recondensation; The 10~20 K ultra-high vacuum beam tube is cooled by heat conduction. The main sources and mechanism of thermal loads for SCU were analyzed. And experimental test of cooling technology for SCU prototype had been performed, the feasibility of cooling scheme and the rationality of the cooling structure for the SINAP SCU prototype were verified. The cryogenic test and operation of the SCU doesn't require the input of liquid helium from the outside, and is not limited by the liquid helium source. This is the characteristic of SINAP's SCU cooling technology.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH22
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TUPH30	ALBA Synchrotron Light Source Liquefaction Helium Plant	synchrotron, 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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TUPH32	Overview of Sesame Water Cooling System Design & Operation	booster, cavity, dipole, storage-ring	108
	M.M. Al Shehab SESAME, Allan, Jordan M. Quispe ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	Funding: IAEA SESAME started operation in January 2017. In order to receive heat deposited in various synchrotron devices during operation, a low-conductivity water cooling system was installed. Within this paper the design, construction and operation of the water cooling system will be discussed, Both Hydraulic and Thermal Behavior of the system will be analyzed and discussed with numerical simulation means as well as real operation pressure and temperature data for the purpose of a better understanding of the cooling system
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH32
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TUPH34	The Use of AM Technologies for HV and UHV Components and Vessels	vacuum, detector, 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.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH34
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TUPH36	Metal 3D Additive Machining for in-Vacuum Beam Instrumentation	vacuum, instrumentation, proton, ISOL	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.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH36
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TUPH39	The Design of LCLS-II Photon Beam Containment System	photon, FEL, synchrotron, experiment	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, synchrotron	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, vacuum, 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 WEOAMA01 [7.575 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOAMA01
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WEOAMA04	The Design of Exactly-Constrained X-Ray Mirror Systems for Sirius	vacuum, alignment, 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 WEOAMA04 [6.607 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOAMA04
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WEOPMA04	Mechanical Design of a New Precision Alignment Apparatus for Compact X-ray Compound Refractive Lens Manipulator	alignment, HOM, detector, GUI	168
	D. Shu, J.W.J. Anton, L. Assoufid, W.C. Grizolli, Z. Islam, S.P. Kearney, P. Kenesei, S.D. Shastri, X. Shi ANL, Argonne, Illinois, USA J.W.J. Anton University of Illinois at Chicago, Chicago, USA
	Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357. A prototype of compact x-ray compound refractive lens (CRL) manipulator system has been developed at the Argonne National Laboratory for dark-field imaging of multi-scale structures. This novel full-field imaging modality uses Bragg peaks to reconstruct 3D distribution of mesoscopic and microscopic structures that govern the behavior of functional materials, in particular, thermodynamic phase transitions in magnetic systems. At the heart of this microscopy technique is a CRL-based x-ray objective lens* with an easily adjustable focal length to isolate any region of interest, typically in the energy range of 5-100 keV or higher, with high precision positional and angular reproducibility. Since the x-ray CRL manipulator system for this technique will be implemented on a high-resolution diffractometer detector arm that rotates during diffraction studies, compactness and system stability, along with the ability to change focal length (zooming), became key design requirements for this new CRL manipulator system. The mechanical design of the compact x-ray CRL manipulator system, as well as finite element analyses for its precision alignment apparatus are described in this paper. * http://www.rxoptics.de/intro.html
	Slides WEOPMA04 [4.189 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOPMA04
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WEPH07	Photon Beam Applied as Heat Flux on Irregular Surfaces in FEA	photon, software, simulation, radiation	214
	D. Capatina ANL, Argonne, Illinois, USA
	Funding: Work at the Advanced Photon Source is supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. The light source front ends and beamlines contain several devices designed to limit the size of, or completely stop, the photon beam. Most of these devices are meant to protect personnel and/or equipment, thus their failure would have serious implications for the facility operation. The photon beam carries extremely high energy, thus the system will experience very large thermal loads. Accurate temperature and stress distribution of these components, based on well-reasoned assumptions, is needed to accurately review the performance of these devices during the design process. Applying nonuniform heat flux as a thermal load in simulation presents a challenge. This work describes the steps of the thermomechanical numerical simulation for a typical component at the Advanced Photon Source (APS), subject to photon beam interception. The numerical algorithm used to apply the nonuniform heat flux distribution on an irregular type of surface is presented in detail. The algorithm was developed using the commercial Finite Element Analysis (FEA) software ANSYS of ANSYS, Inc.
	Poster WEPH07 [0.636 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH07
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WEPH08	Application of Remote Installation and Measurement Smart Vehicle in Accelerator	alignment, monitoring, controls, radiation	217
	J.X. Chen, H.Y. He, C.J. Ning, A.X. Wang, Y.J. Yu, J.S. Zhang, D.H. Zhu CSNS, Guangdong Province, People's Republic of China L. Kang, L. Liu, X.J. Nie, G.Y. Wang, J.B. Yu IHEP, Beijing, People's Republic of China
	Funding: National Natural Science Foundation of China, No.11375217 The installation, alignment measurement and vibration monitoring of the accelerator equipment are cumbersome. In order to reduce the work intensity and exposure time of personnel, this paper has developed a smart vehicle that can automatically walk and automatically adjust the horizontal in the accelerator or beam line area. The smart vehicle can move forwards, sideways, oblique lines, rotations and combinations, and can automatically adjust the level according to different terrains. The auto-leveling accuracy is better than 0.001 degrees. By installing vibration measuring equipment or collimating equipment on the vehicle platform, vibration testing and collimation measurement of the equipment in the accelerator or beamline device can be performed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH08
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WEPH29	NSLS-II Vibration Studies to Characterize Beamline Stability	experiment, detector, ion-source, power-supply	267
	C.J. Spataro, F.C. Lincoln, S.K. Sharma BNL, Upton, Long Island, New York, USA
	High performance goals of NSLS-II require stringent mechanical stability of its instruments such as BPMs, slits, mirrors, monochromators, and detectors. Mechanical stability of these components can be compromised by site-wide as well as local vibration sources (pumps, compressors, etc.). Several vibration studies have been performed at NSLS-II at the request of beamline users. This paper presents the results of these studies highlighting sources of vibration and mitigation strategies.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH29
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WEPH30	Energy Efficient Air-Conditioning System Design	controls, ECR, photon, linac	270
	Z.-D. Tsai, W.S. Chan, C.S. Chen, Y.Y. Cheng, Y.-C. Chung, C.Y. Liu NSRRC, Hsinchu, Taiwan
	At the Taiwan Light Source (TLS) and Taiwan Photon Source (TPS), several studies related to energy savings in air-conditioning systems are underway, where heat recovery has been considered for laboratory applications. The performance of a run-around coil has demonstrated that heat recovery plays an important role in energy conservation. Based on this design of an air handling unit (AHU), we enhance this model by combining it with enthalpy control for seasonal changes. Here, we construct a new AHU to verify the practical impact of energy usage. The improvements show that both mechanisms can be achieved simultaneously.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH30
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THOPMA06	Development of Low Vibration Cooling Systems for Beamline Optics Using Heat Pipe Technology	vacuum, 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.
	Slides THOPMA06 [13.432 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THOPMA06
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THPH02	LCLS Pulse Selector, A Multifunction Shutter for the LCLS-I 120 Hz FEL	controls, timing, FEL, MMI	336
	R. Armenta, E.A. Paiser SLAC, Menlo Park, California, USA
	The LCLS Pulse Selector was designed to pick specific pulses and reduce the repetition rate of the 120Hz LCLS pulse train in support of widely diverse, user defined experiments. It utilizes two rotating parallel plates to alternately transmit and block pulses in a single sweeping motion. A conventional stepper motor connected to the plates provides the rotation. The key to the system is its sophisticated timing scheme. Each sweep of the shutter is synchronized (with a precise delay) with the event codes normally generated with each pulse for data acquisition use. This shutter system has the capability of reducing the repetition rate of the LCLS x-ray to any frequency less than or equal to 60Hz in order to select a single pulse of LCLS x-ray beam at 120Hz. Since its installation, the pulse selector has been used in multiple experiments with great success providing independent pulse selection to individual beamlines at the same time.
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THPH18	A Multi-sample Holder for the MSPD Beamline at ALBA	GUI, synchrotron, 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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THPH19	Engineering Design of the XPD & PDF Beamline Sample Environment for Safe Experimental Use of Hazardous Gases	experiment, FEL, controls, GUI	379
	E. Haas, M. Abeykoon, S. Buda, E.D. Dooryhee, S. Ghose, C. Stelmach, J.T. Trunk BNL, Upton, Long Island, New York, USA
	Funding: U.S. Department of Energy The X-ray Powder Diffraction (XPD) and Pair Distribution Function (PDF) beamlines located at the 28-ID beam port at NSLS-II require a means for safely supplying, containing, and exhausting hazardous gases to and from experimental samples. These beamlines plan to use a wide range of flammable, toxic, and reactive gases for in-situ studies of catalytic and chemical reactions. Since many of the gases are hazardous, a low-cost, robust means is needed to safely supply gases to samples, position the samples quickly, accurately, and remotely, collect scattered X-rays over a wide-angle without distortion, and exhaust the gases safely. Ideally, the sample environment should also allow rapid sample set-up and change-out. The PDF/XPD system includes a sample holder, internal beam stop, sample chamber, and stages that provide eight degrees of freedom. A specially-designed window is also included for maximum X-ray transmission at minimum cost. Sensors, flow metering devices, and circuitry are included to provide proper purging, control hazardous and dilution gas flows, and integrate all of the safeguards needed to assure safe operation. Note to MEDSI reviewers: "Contributed Oral" presentation is indicated above, however a poster presentation can be generated by contacting the author via email at haas@bnl.gov if this is preferred.
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THPH23	Interlock System for a Magnetic-Bearing Pulse Selector	controls, PLC, GUI, software	385
	H. Ishii, J. Adachi, T. Kosuge, H. Tanaka KEK, Ibaraki, Japan
	A hybrid operation mode that enables beam time sharing between single-bunch users and multi-bunch users has been introduced in the PF 2.5GeV ring of KEK (High Energy Accelerator Research Organization). A pulse selector, a kind of optical chopper, is used to permit the passage only of an X-ray pulse that comes from a single bunch part of the hybrid filling pattern. We have developed a new pulse selector with a magnetic bearing. It comprises a rotating dish-shaped disk, a phase-lock-loop (PLL) controlled motor system, and other parts . The speed and phase of the rotating disk is controlled by TTL signals obtained by dividing the RF signal of the PF 2.5 GeV ring. A commercially available motor driver was designed for lower loading. The rotating disk for the pulse selector is heavier than those disks used previously in which air bearings are used. A rapid deceleration of the rotation causes problems through a large current flow back to the motor driver. In this study, we describe the prototype of a programmable logic controller based on an interlock system to avoid the current flow back problem in the pulse selector.
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THPH41	Frontend Slits for Closely-Spaced Wiggler Beams	wiggler, vacuum, 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.
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Paper

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TUOPMA04

Apple II Insertion Devices Made at MAXIV

undulator, MMI, alignment, polarization

6

A. Thiel, M. Ebbeni, H. Tarawneh
MAX IV Laboratory, Lund University, Lund, Sweden

At present five Apple II insertion devices were made and installed at MAX IV, three of them in the 1.5GeV-ring, and two in the 3GeV-ring. The assembly of the last one of a total number of six Apple II undulators made at MAX IV is currently going on. The undulators have period lengths of 48mm (two devices), 53mm, 58mm, 84mm and 95.2mm. The operational gap range of the 3GeV devices is between 11mm and 150mm, the range of the 1.5GeV devices is 14mm to 150mm. Structural analysis was applied to assure a minimum deflection of the main frame and the magnet array girders. The main frame is made of nodular cast iron, while the girders are made of aluminium alloy. In order to optimize the magnetic tuning the position of the magnet keepers can be adjusted by wedges. The undulators were fiducialized before the installation in the ring tunnel and were aligned in the straight section using their magnetic centre as reference. All MAX IV made undulators have three feet with vertical adjustment and separate horizontal adjusters. This paper describes the design, assembly, shimming and installation of the MAX IV Apple II devices in more detail.

Slides TUOPMA04 [12.328 MB]

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TUOPMA08

Deformable RF Fingers with Axial Extension

vacuum, alignment, 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.

Slides TUOPMA08 [9.954 MB]

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TUPH03

U15 Design and Construction Progress

undulator, vacuum, permanent-magnet, cryogenics

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.

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TUPH05

Design of a Radiation Tolerant, Indexing Profile Monitor for the LCLS Electron Beam

electron, optics, radiation, vacuum

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 TUPH05 [2.024 MB]

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TUPH09

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

vacuum, synchrotron, alignment, 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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TUPH11

Retractable Absorber (Mask) and White Beam Imager Diagnostic for Canted Straight Section

insertion, photon, radiation, alignment

45

J. Da Silva Castro, N. Béchu, C. Herbeaux, N. Hubert, N. Jobert, M. Labat, F. Lepage, A. Mary, K.T. Tavakoli
SOLEIL, Gif-sur-Yvette, France

At the SOLEIL synchrotron, as in other accelerators, two canted sources can coexist on the same straight section for space and economic reasons. For its two long beamlines (ANATOMIX source upstream and NANOSCOPIUM source downstream) SOLEIL has made the choice to equip one of his long straight section with two canted insertion devices capable to operate simultaneously. That implies to take into account the degradation risk management of equipment, due to radiation. As the beam power deposition from the upstream undulator can seriously degrade the downstream one, or even other equipment. To handle these risks, Soleil first designed and installed in 2016 a retractable vertical absorber between both insertions to protect the downstream source from the upstream one. In 2017, Soleil then designed and installed a white beam imager, redundant an existing photon beam monitor (XBPM), to verify the correct positioning / alignment of equipment and beams relative to each other. For the vertical absorber as for the white beam imager Soleil had to meet some interesting technological and manufacturing aspects that we propose to present in a poster.

Poster TUPH11 [3.744 MB]

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TUPH19

A Mechanical Undulator Frame to Minimize Intrinsic Phase Errors

vacuum, 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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TUPH22

Study on Cooling Technology of the Superconducting Undulator at SSRF

cryogenics, SRF, radiation, undulator

75

Y. Liu, S. Sun, J. Wang, L. Wang, S.H. Wang
SINAP, Shanghai, People's Republic of China

A superconducting undulator (SCU) prototpye with the period of 16 mm and the magnetic gap of 9.5 mm has been designed and fabricated at the Shanghai Institute of Applied Physics(SINAP) since late 2013. A set of cooling system is designed to cool down cold masses. This paper presents the details of their design, calculation and test: 4 small cryogenic refrigerators are used as cold sources, and the superconducting coil and beam pipe are independently cooled down; The 4.2 K superconducting coil is mainly cooled by the liquid helium tube of the thermosyphon loop with evaporation and recondensation; The 10~20 K ultra-high vacuum beam tube is cooled by heat conduction. The main sources and mechanism of thermal loads for SCU were analyzed. And experimental test of cooling technology for SCU prototype had been performed, the feasibility of cooling scheme and the rationality of the cooling structure for the SINAP SCU prototype were verified. The cryogenic test and operation of the SCU doesn't require the input of liquid helium from the outside, and is not limited by the liquid helium source. This is the characteristic of SINAP's SCU cooling technology.

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TUPH30

ALBA Synchrotron Light Source Liquefaction Helium Plant

synchrotron, 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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TUPH32

Overview of Sesame Water Cooling System Design & Operation

booster, cavity, dipole, storage-ring

108

M.M. Al Shehab
SESAME, Allan, Jordan
M. Quispe
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

Funding: IAEA
SESAME started operation in January 2017. In order to receive heat deposited in various synchrotron devices during operation, a low-conductivity water cooling system was installed. Within this paper the design, construction and operation of the water cooling system will be discussed, Both Hydraulic and Thermal Behavior of the system will be analyzed and discussed with numerical simulation means as well as real operation pressure and temperature data for the purpose of a better understanding of the cooling system

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TUPH34

The Use of AM Technologies for HV and UHV Components and Vessels

vacuum, detector, 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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TUPH36

Metal 3D Additive Machining for in-Vacuum Beam Instrumentation

vacuum, instrumentation, proton, ISOL

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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TUPH39

The Design of LCLS-II Photon Beam Containment System

photon, FEL, synchrotron, experiment

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, synchrotron

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, vacuum, 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 WEOAMA01 [7.575 MB]

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WEOAMA04

The Design of Exactly-Constrained X-Ray Mirror Systems for Sirius

vacuum, alignment, 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 WEOAMA04 [6.607 MB]

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WEOPMA04

Mechanical Design of a New Precision Alignment Apparatus for Compact X-ray Compound Refractive Lens Manipulator

alignment, HOM, detector, GUI

168

D. Shu, J.W.J. Anton, L. Assoufid, W.C. Grizolli, Z. Islam, S.P. Kearney, P. Kenesei, S.D. Shastri, X. Shi
ANL, Argonne, Illinois, USA
J.W.J. Anton
University of Illinois at Chicago, Chicago, USA

Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357.
A prototype of compact x-ray compound refractive lens (CRL) manipulator system has been developed at the Argonne National Laboratory for dark-field imaging of multi-scale structures. This novel full-field imaging modality uses Bragg peaks to reconstruct 3D distribution of mesoscopic and microscopic structures that govern the behavior of functional materials, in particular, thermodynamic phase transitions in magnetic systems. At the heart of this microscopy technique is a CRL-based x-ray objective lens* with an easily adjustable focal length to isolate any region of interest, typically in the energy range of 5-100 keV or higher, with high precision positional and angular reproducibility. Since the x-ray CRL manipulator system for this technique will be implemented on a high-resolution diffractometer detector arm that rotates during diffraction studies, compactness and system stability, along with the ability to change focal length (zooming), became key design requirements for this new CRL manipulator system. The mechanical design of the compact x-ray CRL manipulator system, as well as finite element analyses for its precision alignment apparatus are described in this paper.
* http://www.rxoptics.de/intro.html

Slides WEOPMA04 [4.189 MB]

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WEPH07

Photon Beam Applied as Heat Flux on Irregular Surfaces in FEA

photon, software, simulation, radiation

214

D. Capatina
ANL, Argonne, Illinois, USA

Funding: Work at the Advanced Photon Source is supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
The light source front ends and beamlines contain several devices designed to limit the size of, or completely stop, the photon beam. Most of these devices are meant to protect personnel and/or equipment, thus their failure would have serious implications for the facility operation. The photon beam carries extremely high energy, thus the system will experience very large thermal loads. Accurate temperature and stress distribution of these components, based on well-reasoned assumptions, is needed to accurately review the performance of these devices during the design process. Applying nonuniform heat flux as a thermal load in simulation presents a challenge. This work describes the steps of the thermomechanical numerical simulation for a typical component at the Advanced Photon Source (APS), subject to photon beam interception. The numerical algorithm used to apply the nonuniform heat flux distribution on an irregular type of surface is presented in detail. The algorithm was developed using the commercial Finite Element Analysis (FEA) software ANSYS of ANSYS, Inc.

Poster WEPH07 [0.636 MB]

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WEPH08

Application of Remote Installation and Measurement Smart Vehicle in Accelerator

alignment, monitoring, controls, radiation

217

J.X. Chen, H.Y. He, C.J. Ning, A.X. Wang, Y.J. Yu, J.S. Zhang, D.H. Zhu
CSNS, Guangdong Province, People's Republic of China
L. Kang, L. Liu, X.J. Nie, G.Y. Wang, J.B. Yu
IHEP, Beijing, People's Republic of China

Funding: National Natural Science Foundation of China, No.11375217
The installation, alignment measurement and vibration monitoring of the accelerator equipment are cumbersome. In order to reduce the work intensity and exposure time of personnel, this paper has developed a smart vehicle that can automatically walk and automatically adjust the horizontal in the accelerator or beam line area. The smart vehicle can move forwards, sideways, oblique lines, rotations and combinations, and can automatically adjust the level according to different terrains. The auto-leveling accuracy is better than 0.001 degrees. By installing vibration measuring equipment or collimating equipment on the vehicle platform, vibration testing and collimation measurement of the equipment in the accelerator or beamline device can be performed.

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WEPH29

NSLS-II Vibration Studies to Characterize Beamline Stability

experiment, detector, ion-source, power-supply

267

C.J. Spataro, F.C. Lincoln, S.K. Sharma
BNL, Upton, Long Island, New York, USA

High performance goals of NSLS-II require stringent mechanical stability of its instruments such as BPMs, slits, mirrors, monochromators, and detectors. Mechanical stability of these components can be compromised by site-wide as well as local vibration sources (pumps, compressors, etc.). Several vibration studies have been performed at NSLS-II at the request of beamline users. This paper presents the results of these studies highlighting sources of vibration and mitigation strategies.

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WEPH30

Energy Efficient Air-Conditioning System Design

controls, ECR, photon, linac

270

Z.-D. Tsai, W.S. Chan, C.S. Chen, Y.Y. Cheng, Y.-C. Chung, C.Y. Liu
NSRRC, Hsinchu, Taiwan

At the Taiwan Light Source (TLS) and Taiwan Photon Source (TPS), several studies related to energy savings in air-conditioning systems are underway, where heat recovery has been considered for laboratory applications. The performance of a run-around coil has demonstrated that heat recovery plays an important role in energy conservation. Based on this design of an air handling unit (AHU), we enhance this model by combining it with enthalpy control for seasonal changes. Here, we construct a new AHU to verify the practical impact of energy usage. The improvements show that both mechanisms can be achieved simultaneously.

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THOPMA06

Development of Low Vibration Cooling Systems for Beamline Optics Using Heat Pipe Technology

vacuum, 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.

Slides THOPMA06 [13.432 MB]

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THPH02

LCLS Pulse Selector, A Multifunction Shutter for the LCLS-I 120 Hz FEL

controls, timing, FEL, MMI

336

R. Armenta, E.A. Paiser
SLAC, Menlo Park, California, USA

The LCLS Pulse Selector was designed to pick specific pulses and reduce the repetition rate of the 120Hz LCLS pulse train in support of widely diverse, user defined experiments. It utilizes two rotating parallel plates to alternately transmit and block pulses in a single sweeping motion. A conventional stepper motor connected to the plates provides the rotation. The key to the system is its sophisticated timing scheme. Each sweep of the shutter is synchronized (with a precise delay) with the event codes normally generated with each pulse for data acquisition use. This shutter system has the capability of reducing the repetition rate of the LCLS x-ray to any frequency less than or equal to 60Hz in order to select a single pulse of LCLS x-ray beam at 120Hz. Since its installation, the pulse selector has been used in multiple experiments with great success providing independent pulse selection to individual beamlines at the same time.

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THPH18

A Multi-sample Holder for the MSPD Beamline at ALBA

GUI, synchrotron, 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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THPH19

Engineering Design of the XPD & PDF Beamline Sample Environment for Safe Experimental Use of Hazardous Gases

experiment, FEL, controls, GUI

379

E. Haas, M. Abeykoon, S. Buda, E.D. Dooryhee, S. Ghose, C. Stelmach, J.T. Trunk
BNL, Upton, Long Island, New York, USA

Funding: U.S. Department of Energy
The X-ray Powder Diffraction (XPD) and Pair Distribution Function (PDF) beamlines located at the 28-ID beam port at NSLS-II require a means for safely supplying, containing, and exhausting hazardous gases to and from experimental samples. These beamlines plan to use a wide range of flammable, toxic, and reactive gases for in-situ studies of catalytic and chemical reactions. Since many of the gases are hazardous, a low-cost, robust means is needed to safely supply gases to samples, position the samples quickly, accurately, and remotely, collect scattered X-rays over a wide-angle without distortion, and exhaust the gases safely. Ideally, the sample environment should also allow rapid sample set-up and change-out. The PDF/XPD system includes a sample holder, internal beam stop, sample chamber, and stages that provide eight degrees of freedom. A specially-designed window is also included for maximum X-ray transmission at minimum cost. Sensors, flow metering devices, and circuitry are included to provide proper purging, control hazardous and dilution gas flows, and integrate all of the safeguards needed to assure safe operation.
Note to MEDSI reviewers:
"Contributed Oral" presentation is indicated above, however a poster presentation can be generated by contacting the author via email at haas@bnl.gov if this is preferred.

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THPH23

Interlock System for a Magnetic-Bearing Pulse Selector

controls, PLC, GUI, software

385

H. Ishii, J. Adachi, T. Kosuge, H. Tanaka
KEK, Ibaraki, Japan

A hybrid operation mode that enables beam time sharing between single-bunch users and multi-bunch users has been introduced in the PF 2.5GeV ring of KEK (High Energy Accelerator Research Organization). A pulse selector, a kind of optical chopper, is used to permit the passage only of an X-ray pulse that comes from a single bunch part of the hybrid filling pattern. We have developed a new pulse selector with a magnetic bearing. It comprises a rotating dish-shaped disk, a phase-lock-loop (PLL) controlled motor system, and other parts . The speed and phase of the rotating disk is controlled by TTL signals obtained by dividing the RF signal of the PF 2.5 GeV ring. A commercially available motor driver was designed for lower loading. The rotating disk for the pulse selector is heavier than those disks used previously in which air bearings are used. A rapid deceleration of the rotation causes problems through a large current flow back to the motor driver. In this study, we describe the prototype of a programmable logic controller based on an interlock system to avoid the current flow back problem in the pulse selector.

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THPH41

Frontend Slits for Closely-Spaced Wiggler Beams

wiggler, vacuum, 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.

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