MEDSI2018 - List of Keywords (photon)

Paper	Title	Other Keywords	Page
TUPH04	Progress on the Final Design of the APS-Upgrade Storage Ring Vacuum System	vacuum, storage-ring, 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.
	Poster TUPH04 [7.042 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH04
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TUPH11	Retractable Absorber (Mask) and White Beam Imager Diagnostic for Canted Straight Section	insertion, radiation, operation, 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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TUPH17	Design Considerations Associated with the Replacement of a Sextupole Magnet by a Short Wiggler in a Cell of the Diamond Storage Ring Lattice	wiggler, storage-ring, sextupole, dipole	63
	N.P. Hammond, I.P.S. Martin DLS, Oxfordshire, United Kingdom
	Now that all of the original straight sections in the Diamond storage ring are occupied, novel ways of converting bending magnet beamline locations into insertion device beamlines have been considered. Recently one cell of the 24 cells was reconfigured in to a Double-Double Bend Achromat (DDBA) to provide a new location for an Undulator and enable a formerly designated bending magnet beamline to become an Insertion Device Beamline. Extending this concept for the new Dual Imaging and Diffraction (DIAD) Beamline proved to have a strong impact on lifetime and injection efficiency, so instead it was decided to remove a Sextupole magnet in one cell and substitute it with a short fixed gap Wiggler. The accelerator physics, mechanical and electrical design aspects associated with the change are described. Mechanical Engineering solutions for the Diamond DDBA Project, J Kay, MEDSI 2014
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH17
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TUPH29	Next Generation X-ray Beam Position Monitor System for the Advanced Photon Source MBA Upgrade	detector, undulator, scattering, monitoring	99
	S.M. Oprondek, J.S. Downey, Y. Jaski, S.H. Lee, J. Mulvey, M. Ramanathan, F. Westferro, B.X. Yang ANL, Argonne, Illinois, USA
	Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-D6CH11357 The Advanced Photon Source (APS) upgrade from double-bend achromats (DBA) to multi-bend achromats (MBA) lattice has increased the need for reliable diagnos-tic systems. This upgrade will decrease the size of the photon beam drastically and beam current will be in-creased from 100 mA to 200 mA. The small beam and intense heat loads provided by the upgraded APS requires unique and innovative approaches to beam position monitoring. To meet the need for a reliable diagnostic system for the APS upgrade, the next generation X-ray Beam Position Monitoring System (XBPM) is required which includes the first XBPM (XBPM1), the Intensity Monitor (IM1) and the second XBPM (XBPM2). This paper presents progress and status of the current configu-ration of the XBPM system especially the development work involving the IM1 and XBPM2. The R&D work to develop an alternative XBPM1 using the Compton scattering principle is also presented.
	Poster TUPH29 [1.817 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH29
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TUPH31	Development of a Revolver Type Undulator	undulator, insertion-device, electron, insertion	105
	T. Ramm, M. Tischer DESY, Hamburg, Germany
	A revolver type undulator is developed for the SASE section of the FLASH Free-Electron Laser (FEL) at DESY. Currently, a 1,2GeV linear accelerator injects electrons into two undulator lines to provide fully coherent VUV light to different experimental stations in two experimental halls. The more recently built FLASH2 branch consists of 12 planar undulators with a fixed magnet structure of ~32mm period length. Within plans for refurbishment of the original FLASH1 undulator section and also to open up new operation schemes with an extended photon energy range, an undulator development was started that allows for a change of different magnet structures. Once installed, it will be possible to change the wavelength range or the FEL operation scheme within a short period of time. Magnet structures can then be switched at any time without any observable effect on the electron beam orbit or the photon beam position. The single design steps are described in the following article: profile of requirements, choice of an applicable changing mechanism, development of a new magnet structure, the position of the bearing points, a new floor assembly and improvement of the cantilever arm.
	Poster TUPH31 [1.534 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH31
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TUPH39	The Design of LCLS-II Photon Beam Containment System	FEL, synchrotron, experiment, operation	133
	H. Wang, Y. Feng, S. Forcat Oller, J. Krzywiński, E. Ortiz, M. Rowen SLAC, Menlo Park, California, USA
	LCLS-II will produce very powerful photon beams. Unlike conventional synchrotrons, the LCLS-II beam containment components withstand not only the high average beam power and power density, but also the instantaneous thermal shocks from pulsed FEL beam, which can reach ~9mJ/pulse. With beam repetition rate up to 1MHz, regular metal based beam collimators and absorbers will no longer work, because of the likelihood of fatigue failure. And because of the poor thermal conductivity, the old LCLS B4C based absorber would need very shallow glancing angle and take valuable beamline space. Hence, a low-Z and high thermal conductivity CVD diamond based photon beam collimator and absorber systems have been developed in LCSL-II. The initial damage tests using LCLS FEL beam provided positive results that graphite coated CVD diamond can endure per pulse dose level to ~0.5eV/atom. For the beamline and personnel safety, in addition to the passive CVD diamond collimators and absorbers, newly developed photon diode beam mis-steer detection systems and conventional SLAC pressurized burnt-through monitors have been also introduced in the photon beamline system design.
	Poster TUPH39 [1.251 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH39
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WEOAMA05	FE Model of a Nanopositioning Flexure Stage for Diagnosis of Trajectory Errors	experiment, simulation, interface, laser	179
	S.P. Kearney, 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 Advanced Photon Source Upgrade project includes upgrading several beamlines, which desire nanopositioning and fly-scan capabilities. A step towards achieving this is through the use of flexure stages with minimal trajectory errors. Typically, parasitic motion is on the order of micrometer-level displacements and tens of microradian-level rotations [1]. The cause of such errors is difficult to diagnosis due to the scale and complexity of the overall mechanism. Therefore, an FE model of a flexure pivot nanopositioning stage with centimeter-level travel range [1, 2] has been developed to aid in trajectory error diagnosis. Previous work used an FE model and relative error analysis to quantify the effects of assembly error on trajectory errors [3]. Relative error analysis was used due to the difficulty in validating a complex FE model. This study develops an experimentally validated FE model of a single joint to quantify the expected error in the full FE model. The full model is then compared experimentally to the flexure stage to assess the model accuracy and diagnosis trajectory errors. * D. Shu, et al. In Proc. SPIE, vol. 10371, 2017. U.S. Patent granted No. 8,957, 567, D. Shu, S. Kearney, and C. Preissner, 2015. * S. Kearney and D. Shu. In Proc. SPIE, vol. 10371, 2017.
	Slides WEOAMA05 [5.137 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOAMA05
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WEPH04	Finite Element Analysis of a Combined White Beam Filter and Visual Screen Using CVD Diamond for the BXDS Beamline	undulator, experiment, storage-ring, simulation	208
	D.M. Smith, M.J.P. Adam, G.R. Barkway, A.J. Janis CLS, Saskatoon, Saskatchewan, Canada
	A white beam filter and visual screen are required for the undulator beamline at the Brockhouse X-Ray Diffraction and Scattering Sector. Reusing a water-cooled copper paddle with a 0.1 mm thick chemical vapor deposition (CVD) diamond foil, a combined filter and screen design is presented. The Canadian Light Source previously experienced failure of CVD diamond filters when exposed to high flux density white beam. Finite element analysis (FEA) was done to determine if the CVD diamond will fracture under the undulator heat load. Conservative failure criteria are selected for CVD diamond based on available literature for the following failure mechanisms: high temperature, thermal fatigue, and temperature induced stress. Four designs are analyzed using FEA models simulating effects of clamping pressure and heat load on the CVD diamond. The simulations are verified by optimizing the model mesh, comparing results against hand calculations, and comparing theoretical absorbed heat load to simulated values. Details of the modeling method are reviewed and results for the different designs evaluated. Suggestions for future testing of CVD diamond in a synchrotron setting will be discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH04
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WEPH07	Photon Beam Applied as Heat Flux on Irregular Surfaces in FEA	software, operation, 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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WEPH14	Optomechanical Optimization for a Sagittaly Bent Double Crystal Monochromator, Using Finite Elements and Ray Tracing	focusing, synchrotron, software, radiation	231
	N. Jobert, E. Fonda, T. Moreno, M. Ribbens SOLEIL, Gif-sur-Yvette, France
	Designing a second crystal for a sagittally bent Double Crystal Monochromator (DCM) requires dealing with a number of conflicting requirements. Especially when working with high-energy photons, the angular aperture (Darwin width) becomes very narrow (below 10µrad for Si) while simultaneously the bending radius is increasing small (down to 1m for typical beamline dimensions at 40keV). In this situation, the cross-talk between tangential and sagittal curvature becomes a key parameter, and two strategies are generally used to overcome the issue: either using a flat crystal with a specific length/with ratio, or usage of a rib-stiffened crystal. In the frame of the upgrade of the SAMBA beamline DCM, both solutions have been explored, using a suite of scripts connecting a general purpose FEM code (ANSYS) and a ray-tracing code (SpotX). This has allowed a systematic evaluation of a wide number of configurations, giving insight in the interaction between geometric parameters, and ultimately resulting in a twofold increase in the photon throughput at 30keV without comprising neither spectral resolution nor spot size at sample location.
	Poster WEPH14 [3.378 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH14
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WEPH16	Thermal Analysis of High Heat Load Mirrors for the in-Situ Nanoprobe Beamline of the APS Upgrade	insertion-device, undulator, insertion, focusing	238
	J.J. Knopp, M.V. Fisher, Z. Liu, J. Maser, R. Reininger, X. Shi ANL, Argonne, Illinois, USA
	The Advanced Photon Source (APS) is currently in the process of upgrading to a multi-bend achromat (MBA) storage ring, which will increase brightness and coherent flux by several orders of magnitude. The planned In-Situ Nanoprobe (ISN) beamline, one of the feature beamlines of the APS Upgrade (APS-U) project, is a 220 m long beamline that aims to focus the x-ray beam to a spot size of 20 nm or below by focusing with a KB pair. A double-mirror system, consisting of a high heat load mirror and a pink beam mirror, is designed to provide high harmonic rejection, reduce the power transmitted to the monochromator, and focus the beam along the vertical direction to a beam-defining aperture (BDA). One of the key issues is to manage the high power and power density absorbed by these mirrors. To attain the best focus at the BDA, the pink beam mirror needs to be mechanically bent to correct for thermal deformations on both mirrors. In this paper we report on the thermal responses of the mirror system to different undulator tunings and cooling schemes as calculated with Finite Element Analysis (FEA) and optical ray tracing.
	Poster WEPH16 [0.742 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH16
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WEPH24	Design of an Integrated Crotch Absorber for ALBA Synchrotron Light Source	radiation, dipole, vacuum, 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.
	Poster WEPH24 [1.046 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH24
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WEPH30	Energy Efficient Air-Conditioning System Design	controls, ECR, linac, operation	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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WEPH31	Optimization Method Using Thermal and Mechanical Simulations for Sirius High-Stability Mirrors	simulation, cryogenics, synchrotron, radiation	273
	L.M. Volpe, G.V. Claudiano, R.R. Geraldes, S.A.L. Luiz, A.C. Pinto LNLS, Campinas, Brazil
	Funding: Brazil's Ministry of Science, Technology, Innovation and Communication (MCTIC) The mirrors for Sirius, the new 4th-generation synchrotron at the Brazilian Synchrotron Light Laboratory (LNLS), have strict requirements regarding thermo-mechanical stability and deformations, with figure height and slope errors limited to a few nanometers and tens of nanoradians, respectively. Therefore, fixed-shape mirrors have been defined with horizontally-reflecting orientation (except for vertically-reflecting mirrors of KB systems), whereas their cooling schemes (namely, air, water or liquid nitrogen cooling) depend on the particular power load. A thermal and mechanical optimization method was developed to guide the design of mirrors through the evaluation of deformations caused by power load, cooling, gravity, tightening of the fastening screws, manufacturing errors and modal analyses. Up to now, this method was already used to define the mirrors of Sirius' beamlines, which include plane, cylindrical, elliptical and ellipsoidal mirrors, as well as KB systems for microprobe and nanoprobe stations. Two examples are presented to illustrate the method.
	Poster WEPH31 [1.296 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH31
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WEPH38	Mechanical Design and Construction of the Coherent X-ray Scattering Beamline at Taiwan Photon Source	vacuum, radiation, 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.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH38
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WEPH39	Validation Results for Sirius APU19 Front End Prototype	vacuum, 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.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH39
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WEPH41	The Detector Adjustment System of Taiwan Photon Source 24A	detector, GUI, alignment, vacuum	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	vacuum, storage-ring, lattice, 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.
	Slides THOAMA05 [6.832 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THOAMA05
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THOAMA06	A New X-Ray Beam for the ESRF Beamlines, Opto-Mechanical Global Survey	SRF, undulator, optics, electron	316
	Y. Dabin, R. Barrett, SJ. Jarjayes, M. Sanchez del Rio ESRF, Grenoble, France
	The new ESRF photon source EBS, introduces important changes for the beamlines. Half of them are concerned with the concept of low beta (small source size/ high divergence). This survey is an opto-mechanical review with all of the thermal/high heat-load issues on optics. This plan uses new package, OASYS aimed at making X-ray beam simulations for most optical parameters. White beam aspects are introduced, using ANSYS and COMSOL modules, leading to beam propagation FEA analysis with deformed optics. This presentation describes the optical aspects of the ESRF beamlines (high/low beta optics), and their transition towards this new source. Some key issues like IDs beam illumination; power filtering and optimization of the best part of the spectrum are detailed. Mirrors and monochromator crystals deformation will be presented, first for the day-one best conditions. As a second issue, OASYS enables to simulate the full beamline, from the IDs to the experiment, allowing simulating virtual experiments, with samples. This work is developed through many ESRF contributors; first the OASYS designers, Optics group, and then opto-mechanical experts, in association with mechanical engineering. OASYS (OrAnge SYnchrotron Suite) is a simulation tool suite (2013)- This open source platform supports SHADOW, XOP, SRW (source)-Maintained and distributed by the ESRF-M. Sanchez Del Rio-L. Rebuffi
	Slides THOAMA06 [7.552 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THOAMA06
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THOPMA02	Beamline Engineering Overview for the APS Upgrade	storage-ring, optics, vacuum, 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.
	Slides THOPMA02 [15.407 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THOPMA02
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THPH03	The XBPM Project at MAX IV Frontends, Overview and First Results	storage-ring, shielding, controls, high-voltage	340
	A. Bartalesi MAX IV Laboratory, Lund University, Lund, Sweden
	All the frontends installed on the 3GeV storage ring at MAX IV are equipped with two X-Ray Beam Position Monitors. Having recently finished the installation of the acquisition system, it was possible to record and analyse data. This presentation describes the setup and shows the first results.
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THPH04	Fast X-Ray Beam Intensity Stabilization for Absorption Spectroscopy and Spectromicroscopic Imaging	controls, focusing, vacuum, feedback	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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THPH09	Design of Indirect X-Ray Detectors for Tomography on the Anatomix Beamline	detector, synchrotron, experiment, SRF	355
	D.K. Desjardins, A.C. Carcy, J.L. Giorgetta, C. Menneglier, M. Scheel, T. Weitkamp SOLEIL, Gif-sur-Yvette, France
	ANATOMIX* is a long beamline for full-field tomography techniques at the French synchrotron SOLEIL [1]. It will operate in the energy range from 5 to 30 keV, and feature several operation modes via versatile optics configurations, including direct white beam propagation. Two methodologically different experimental stations will be used: parallel-beam X-ray shadowgraphy, for spatial resolution down to the sub-micron range, and full-field transmission X-ray microscopy down to a spatial resolution of less than 100 nm. To cover this large panel of experimental possibilities, the Detector Group, the Mechanical Engineering Group and beamline team have designed four dedicated indirect X-ray detector. For pixels in the sub-micron size range : a micro-tomography revolver camera for versatility, a high-efficiency camera for flux-limited experiments, and a high-resolution camera for the largest optical magnifications will be available. For experiments with a large X-ray beam and pixel sizes from several microns upward, a "large-field" camera completes the set. We describe these different assemblies with the detailed components and expected specification of each solution. * Beamline largely funded by the French National Research Agency through the EQUIPEX investment program, NanoimagesX. [1] T Weitkamp et al 2017 J. Phys.: Conf. Ser. 849 012037
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THPH11	LCLS-II FEL Photon Collimators Design	FEL, linac, undulator, laser	358
	S. Forcat Oller, Y. Feng, J. Krzywiński, E. Ortiz, M. Rowen, H. Wang SLAC, Menlo Park, California, USA
	The unique capabilities of LCLS, the world's first hard X-ray FEL, have had significant impact on advancing our understanding across a broad range of science. LCLS-II, a major upgrade of LCLS, is being developed as a high-repetition rate X-ray laser with two simultaneously operating FELs. It features a 4 GeV continuous wave superconducting Linac capable of producing ultrafast X-ray laser pulses at a repetition rate up to 1 MHz and energy range from 0.25 to 5 keV. The LCLS-II upgrade is an enormous engineering challenge not only on the accelerator side but also for safety, machine protection devices and diagnostic units. A major part of the beam containment is covered by the FEL beam collimators. The current collimator design is no longer suitable for the high power densities of the upcoming LCLS-II beam. Therefore, a complete new design has been conceived to satisfy this new constrains. Moreover, a special FEL miss-steering detection system based on a photo diodes array has been designed as an integral part of the photon collimator as additional safety feature. This poster describes the new LCLS-II FEL Collimators, their mechanical design and challenges encountered.
	Poster THPH11 [1.164 MB]
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THPH24	Front End Designs for the Advanced Photon Source Multi-bend Achromats Upgrade	storage-ring, shielding, undulator, detector	388
	Y. Jaski, M. Abliz, J.S. Downey, S.H. Lee, J. Mulvey, S.M. Oprondek, M. Ramanathan, F. Westferro, B.X. Yang ANL, Argonne, Illinois, USA
	Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357 The Advanced Photon Source (APS) upgrade from double-bend achromats (DBA) to multi-bend achromats (MBA) lattice is underway. This upgrade will change the storage ring energy from 7 GeV to 6 GeV and beam current from 100 mA to 200 mA. All front ends must be upgraded to fulfill the following requirements: 1) Include a clearing magnet in all front ends to deflect and dump any electrons in case the electrons escape from the storage ring during swap-out injection with the safety shutters open, 2) Incorporate the next generation x-ray beam position monitors (XBPMs) into the front ends to meet the new stringent beam stability requirements, 3) For insertion device (ID) front ends, handle the high heat load from two undulators in either inline or canted configuration. The upgraded APS ID front ends will only have two types: High Heat Load Front End (HHLFE) for single beam and Canted Undulator Front End (CUFE) for canted beam. This paper presents the final design of the HHLFE and preliminary design of the CUFE.
	Poster THPH24 [1.279 MB]
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THPH26	Mechanical Conversion of a Vertically Reflecting Artificial Channel-cut Monochromator to Horizontally Reflecting	vacuum, 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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THPH27	Mechanical Design of a Compact Non-invasive Wavefront Sensor for Hard X-rays	optics, monitoring, alignment, controls	394
	S.P. Kearney, L. Assoufid, W.C. Grizolli, T. Kolodziej, K. Lang, A. Macrander, X. Shi, D. Shu, Yu. Shvyd'ko, W. Wojcik ANL, Argonne, Illinois, USA
	Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DEAC02-06CH11357. Abstract This work describes mechanical design of a prototype compact wavefront sensor for in situ measurement and monitoring of beam wavefront of hard x-ray beamlines [1]. The system is based on a single-shot grating interferometer [2, 3] and a thin diamond single-crystal beam splitter. The beam splitter is designed to be inserted in the incident and oriented to diffract a fraction of the incident beam bandwidth into the interferometer, for wavefront measurement and reconstruction. The concept is intended to study the feasibility of a non-invasive wavefront sensor for real time wavefront monitoring and diagnostics, with possible application in adaptive mirrors for wavefront preservation and control [1, 4]. The design focus was on compactness to enable easy portability and implementation in a beamline. * L. Assoufid et al., Rev. Sci. Instrum., 87(5), 052004, 2016 W. Grizolli et al., SPIE Proc., 1038502, 2017 * S. Marathe et al., Adaptive X-Ray Optics III, SPIE Proc., 92080D, 2014
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THPH31	Design of a flexible RIXS Setup	detector, alignment, vacuum, experiment	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 THPH31 [0.859 MB]
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THPH32	Dual Beam Visualizer - Intensity Monitor for Lucia Beamline at SOLEIL Synchrotron	synchrotron, diagnostics, radiation, optics	403
	C. Menneglier, D.K. Desjardins, V. Pinty, D. Roy, D. Vantelon SOLEIL, Gif-sur-Yvette, France
	LUCIA is a micro-focused beamline (0.8 - 8 keV) dedicated to X-ray fluorescence and X-ray absorption spectroscopy at SOLEIL Synchrotron.* With its recent optical upgrade and photons flux increase, the three pink-beam diagnostics of the beamline have been upgraded to support a beam reaching 10¹³ph/s and 20 W/mm². This paper presents the thermomechanical study and the realization of new devices adapted to the current constraints of use, making possible to both visualize the shape of the pink beam and to measure its intensity simultaneously in the same compact device. The beam is visualized by a piece of Al2O3 - Cr ceramic, soldered to a copper heat sink, whose fluorescence image is visible in visible light with a suitable camera and optical system. The measurement of the photonic intensity is made by a polarized CVD diamond used as a photosensitive element, the current reading is made by a suitable low current amplifier. The design of this dual beam visualizer and intensity monitor, made by the SOLEIL detectors group with thermomechanical studies done by the Mechanical Design Office, will be presented in details. In-lab measurements will be also presented. * D. Vantelon et al., The LUCIA beamline at SOLEIL, Journal of Synchrotron Radiation, vol 23 (part 2), pp 635-640, March 2016. doi:10.1107/S1600577516000746
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THPH36	Engineering Challenges for the NEH2.2 Beamline at LCLS-II	laser, experiment, detector, scattering	409
	F.P. O'Dowd, D. Cocco, G.L. Dakovski, J. Defever, S. Guillet, C.L. Hardin, D.S. Morton, T.O. Osier, M.A. Owens, D.W. Rich, L. Zhang SLAC, Menlo Park, California, USA
	SLAC National Accelerator Laboratory is developing LCLS-II, a superconducting linear accelerator based FEL capable of repetition rates up to 1MHz. The NEH2.2 Instrument at LCLS-II will use this combination of exceptionally high flux of monochromatic photons to achieve multidimensional and coherent X-ray techniques that are possible only with X-ray lasers. The challenges, which emanate from delivering the beam from the sub-basement level to the basement of the Near Experimental Hall (NEH) along with the stringent requirements for providing a stable beam at the interaction points, necessitate unique engineering solutions. With this paper we present the conceptual design for the NEH2.2 Instrument along with an overview of the R&D program required to validate design performance. Furthermore, it will additionally show the design of the proposed Liquid Jet Endstation (LJE) and Resonant Inelastic X-Ray Scattering Endstation (RIXS) that will be installed on the beamline. After introducing the context and layout of the beamline, this paper will focus on the technical challenges and present the mechanical design solutions adopted for beam delivery and other strategic components.
	Poster THPH36 [2.220 MB]
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FROAMA05	Engineering Design and Commissioning Performance of the ESM and Six Soft X-Ray Beamlines at NSLS-II	optics, diagnostics, MMI, electron	435
	Y. Zhu, S. Hulbert, M. Idir, I. Jarrige, S. O'Hara, E. Vescovo BNL, Upton, Long Island, New York, USA
	Two of the five NSLS-II Experimental Tools (NEXT) project insertion-device beamlines developed for the NSLS-II facility at Brookhaven National Laboratory are state-of-the-art soft X-ray beamlines covering the 15 eV- 1500 eV photon energy range. The engineering challenges of these two beamlines included: accurate and realistic optical simulations, nearly perfect optic figure and mechanical/thermal implementation, and advanced diagnostics systems developed in-house. The measured performance (flux, spot size, resolution) of these two beamlines closely matches the calculated values. Here, the engineering design and performance measurements of these two beamlines are presented.
	Slides FROAMA05 [15.534 MB]
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Paper

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Other Keywords

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TUPH04

Progress on the Final Design of the APS-Upgrade Storage Ring Vacuum System

vacuum, storage-ring, 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.

Poster TUPH04 [7.042 MB]

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TUPH11

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

insertion, radiation, operation, 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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TUPH17

Design Considerations Associated with the Replacement of a Sextupole Magnet by a Short Wiggler in a Cell of the Diamond Storage Ring Lattice

wiggler, storage-ring, sextupole, dipole

63

N.P. Hammond, I.P.S. Martin
DLS, Oxfordshire, United Kingdom

Now that all of the original straight sections in the Diamond storage ring are occupied, novel ways of converting bending magnet beamline locations into insertion device beamlines have been considered. Recently one cell of the 24 cells was reconfigured in to a Double-Double Bend Achromat (DDBA) to provide a new location for an Undulator and enable a formerly designated bending magnet beamline to become an Insertion Device Beamline*. Extending this concept for the new Dual Imaging and Diffraction (DIAD) Beamline proved to have a strong impact on lifetime and injection efficiency, so instead it was decided to remove a Sextupole magnet in one cell and substitute it with a short fixed gap Wiggler. The accelerator physics, mechanical and electrical design aspects associated with the change are described.
* Mechanical Engineering solutions for the Diamond DDBA Project, J Kay, MEDSI 2014

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TUPH29

Next Generation X-ray Beam Position Monitor System for the Advanced Photon Source MBA Upgrade

detector, undulator, scattering, monitoring

99

S.M. Oprondek, J.S. Downey, Y. Jaski, S.H. Lee, J. Mulvey, M. Ramanathan, F. Westferro, B.X. Yang
ANL, Argonne, Illinois, USA

Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-D6CH11357
The Advanced Photon Source (APS) upgrade from double-bend achromats (DBA) to multi-bend achromats (MBA) lattice has increased the need for reliable diagnos-tic systems. This upgrade will decrease the size of the photon beam drastically and beam current will be in-creased from 100 mA to 200 mA. The small beam and intense heat loads provided by the upgraded APS requires unique and innovative approaches to beam position monitoring. To meet the need for a reliable diagnostic system for the APS upgrade, the next generation X-ray Beam Position Monitoring System (XBPM) is required which includes the first XBPM (XBPM1), the Intensity Monitor (IM1) and the second XBPM (XBPM2). This paper presents progress and status of the current configu-ration of the XBPM system especially the development work involving the IM1 and XBPM2. The R&D work to develop an alternative XBPM1 using the Compton scattering principle is also presented.

Poster TUPH29 [1.817 MB]

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TUPH31

Development of a Revolver Type Undulator

undulator, insertion-device, electron, insertion

105

T. Ramm, M. Tischer
DESY, Hamburg, Germany

A revolver type undulator is developed for the SASE section of the FLASH Free-Electron Laser (FEL) at DESY. Currently, a 1,2GeV linear accelerator injects electrons into two undulator lines to provide fully coherent VUV light to different experimental stations in two experimental halls. The more recently built FLASH2 branch consists of 12 planar undulators with a fixed magnet structure of ~32mm period length. Within plans for refurbishment of the original FLASH1 undulator section and also to open up new operation schemes with an extended photon energy range, an undulator development was started that allows for a change of different magnet structures. Once installed, it will be possible to change the wavelength range or the FEL operation scheme within a short period of time. Magnet structures can then be switched at any time without any observable effect on the electron beam orbit or the photon beam position. The single design steps are described in the following article: profile of requirements, choice of an applicable changing mechanism, development of a new magnet structure, the position of the bearing points, a new floor assembly and improvement of the cantilever arm.

Poster TUPH31 [1.534 MB]

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TUPH39

The Design of LCLS-II Photon Beam Containment System

FEL, synchrotron, experiment, operation

133

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

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

Poster TUPH39 [1.251 MB]

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WEOAMA05

FE Model of a Nanopositioning Flexure Stage for Diagnosis of Trajectory Errors

experiment, simulation, interface, laser

179

S.P. Kearney, 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 Advanced Photon Source Upgrade project includes upgrading several beamlines, which desire nanopositioning and fly-scan capabilities. A step towards achieving this is through the use of flexure stages with minimal trajectory errors. Typically, parasitic motion is on the order of micrometer-level displacements and tens of microradian-level rotations [1]. The cause of such errors is difficult to diagnosis due to the scale and complexity of the overall mechanism. Therefore, an FE model of a flexure pivot nanopositioning stage with centimeter-level travel range [1, 2] has been developed to aid in trajectory error diagnosis. Previous work used an FE model and relative error analysis to quantify the effects of assembly error on trajectory errors [3]. Relative error analysis was used due to the difficulty in validating a complex FE model. This study develops an experimentally validated FE model of a single joint to quantify the expected error in the full FE model. The full model is then compared experimentally to the flexure stage to assess the model accuracy and diagnosis trajectory errors.
* D. Shu, et al. In Proc. SPIE, vol. 10371, 2017.
** U.S. Patent granted No. 8,957, 567, D. Shu, S. Kearney, and C. Preissner, 2015.
*** S. Kearney and D. Shu. In Proc. SPIE, vol. 10371, 2017.

Slides WEOAMA05 [5.137 MB]

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WEPH04

Finite Element Analysis of a Combined White Beam Filter and Visual Screen Using CVD Diamond for the BXDS Beamline

undulator, experiment, storage-ring, simulation

208

D.M. Smith, M.J.P. Adam, G.R. Barkway, A.J. Janis
CLS, Saskatoon, Saskatchewan, Canada

A white beam filter and visual screen are required for the undulator beamline at the Brockhouse X-Ray Diffraction and Scattering Sector. Reusing a water-cooled copper paddle with a 0.1 mm thick chemical vapor deposition (CVD) diamond foil, a combined filter and screen design is presented. The Canadian Light Source previously experienced failure of CVD diamond filters when exposed to high flux density white beam. Finite element analysis (FEA) was done to determine if the CVD diamond will fracture under the undulator heat load. Conservative failure criteria are selected for CVD diamond based on available literature for the following failure mechanisms: high temperature, thermal fatigue, and temperature induced stress. Four designs are analyzed using FEA models simulating effects of clamping pressure and heat load on the CVD diamond. The simulations are verified by optimizing the model mesh, comparing results against hand calculations, and comparing theoretical absorbed heat load to simulated values. Details of the modeling method are reviewed and results for the different designs evaluated. Suggestions for future testing of CVD diamond in a synchrotron setting will be discussed.

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WEPH07

Photon Beam Applied as Heat Flux on Irregular Surfaces in FEA

software, operation, 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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WEPH14

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

focusing, synchrotron, software, radiation

231

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

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

Poster WEPH14 [3.378 MB]

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WEPH16

Thermal Analysis of High Heat Load Mirrors for the in-Situ Nanoprobe Beamline of the APS Upgrade

insertion-device, undulator, insertion, focusing

238

J.J. Knopp, M.V. Fisher, Z. Liu, J. Maser, R. Reininger, X. Shi
ANL, Argonne, Illinois, USA

The Advanced Photon Source (APS) is currently in the process of upgrading to a multi-bend achromat (MBA) storage ring, which will increase brightness and coherent flux by several orders of magnitude. The planned In-Situ Nanoprobe (ISN) beamline, one of the feature beamlines of the APS Upgrade (APS-U) project, is a 220 m long beamline that aims to focus the x-ray beam to a spot size of 20 nm or below by focusing with a KB pair. A double-mirror system, consisting of a high heat load mirror and a pink beam mirror, is designed to provide high harmonic rejection, reduce the power transmitted to the monochromator, and focus the beam along the vertical direction to a beam-defining aperture (BDA). One of the key issues is to manage the high power and power density absorbed by these mirrors. To attain the best focus at the BDA, the pink beam mirror needs to be mechanically bent to correct for thermal deformations on both mirrors. In this paper we report on the thermal responses of the mirror system to different undulator tunings and cooling schemes as calculated with Finite Element Analysis (FEA) and optical ray tracing.

Poster WEPH16 [0.742 MB]

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WEPH24

Design of an Integrated Crotch Absorber for ALBA Synchrotron Light Source

radiation, dipole, vacuum, 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.

Poster WEPH24 [1.046 MB]

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WEPH30

Energy Efficient Air-Conditioning System Design

controls, ECR, linac, operation

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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WEPH31

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

simulation, cryogenics, synchrotron, radiation

273

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

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

Poster WEPH31 [1.296 MB]

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WEPH38

Mechanical Design and Construction of the Coherent X-ray Scattering Beamline at Taiwan Photon Source

vacuum, radiation, 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

vacuum, 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, vacuum

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

vacuum, storage-ring, lattice, 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.

Slides THOAMA05 [6.832 MB]

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THOAMA06

A New X-Ray Beam for the ESRF Beamlines, Opto-Mechanical Global Survey

SRF, undulator, optics, electron

316

Y. Dabin, R. Barrett, SJ. Jarjayes, M. Sanchez del Rio
ESRF, Grenoble, France

The new ESRF photon source EBS, introduces important changes for the beamlines. Half of them are concerned with the concept of low beta (small source size/ high divergence). This survey is an opto-mechanical review with all of the thermal/high heat-load issues on optics. This plan uses new package, OASYS aimed at making X-ray beam simulations for most optical parameters. White beam aspects are introduced, using ANSYS and COMSOL modules, leading to beam propagation FEA analysis with deformed optics. This presentation describes the optical aspects of the ESRF beamlines (high/low beta optics), and their transition towards this new source. Some key issues like IDs beam illumination; power filtering and optimization of the best part of the spectrum are detailed. Mirrors and monochromator crystals deformation will be presented, first for the day-one best conditions. As a second issue, OASYS enables to simulate the full beamline, from the IDs to the experiment, allowing simulating virtual experiments, with samples. This work is developed through many ESRF contributors; first the OASYS designers, Optics group, and then opto-mechanical experts, in association with mechanical engineering.
OASYS (OrAnge SYnchrotron Suite) is a simulation tool suite (2013)- This open source platform supports SHADOW, XOP, SRW (source)-Maintained and distributed by the ESRF-M. Sanchez Del Rio-L. Rebuffi

Slides THOAMA06 [7.552 MB]

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THOPMA02

Beamline Engineering Overview for the APS Upgrade

storage-ring, optics, vacuum, 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.

Slides THOPMA02 [15.407 MB]

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THPH03

The XBPM Project at MAX IV Frontends, Overview and First Results

storage-ring, shielding, controls, high-voltage

340

A. Bartalesi
MAX IV Laboratory, Lund University, Lund, Sweden

All the frontends installed on the 3GeV storage ring at MAX IV are equipped with two X-Ray Beam Position Monitors. Having recently finished the installation of the acquisition system, it was possible to record and analyse data. This presentation describes the setup and shows the first results.

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THPH04

Fast X-Ray Beam Intensity Stabilization for Absorption Spectroscopy and Spectromicroscopic Imaging

controls, focusing, vacuum, feedback

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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THPH09

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

detector, synchrotron, experiment, SRF

355

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

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

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THPH11

LCLS-II FEL Photon Collimators Design

FEL, linac, undulator, laser

358

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

The unique capabilities of LCLS, the world's first hard X-ray FEL, have had significant impact on advancing our understanding across a broad range of science. LCLS-II, a major upgrade of LCLS, is being developed as a high-repetition rate X-ray laser with two simultaneously operating FELs. It features a 4 GeV continuous wave superconducting Linac capable of producing ultrafast X-ray laser pulses at a repetition rate up to 1 MHz and energy range from 0.25 to 5 keV. The LCLS-II upgrade is an enormous engineering challenge not only on the accelerator side but also for safety, machine protection devices and diagnostic units. A major part of the beam containment is covered by the FEL beam collimators. The current collimator design is no longer suitable for the high power densities of the upcoming LCLS-II beam. Therefore, a complete new design has been conceived to satisfy this new constrains. Moreover, a special FEL miss-steering detection system based on a photo diodes array has been designed as an integral part of the photon collimator as additional safety feature. This poster describes the new LCLS-II FEL Collimators, their mechanical design and challenges encountered.

Poster THPH11 [1.164 MB]

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THPH24

Front End Designs for the Advanced Photon Source Multi-bend Achromats Upgrade

storage-ring, shielding, undulator, detector

388

Y. Jaski, M. Abliz, J.S. Downey, S.H. Lee, J. Mulvey, S.M. Oprondek, M. Ramanathan, F. Westferro, B.X. Yang
ANL, Argonne, Illinois, USA

Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357
The Advanced Photon Source (APS) upgrade from double-bend achromats (DBA) to multi-bend achromats (MBA) lattice is underway. This upgrade will change the storage ring energy from 7 GeV to 6 GeV and beam current from 100 mA to 200 mA. All front ends must be upgraded to fulfill the following requirements: 1) Include a clearing magnet in all front ends to deflect and dump any electrons in case the electrons escape from the storage ring during swap-out injection with the safety shutters open, 2) Incorporate the next generation x-ray beam position monitors (XBPMs) into the front ends to meet the new stringent beam stability requirements, 3) For insertion device (ID) front ends, handle the high heat load from two undulators in either inline or canted configuration. The upgraded APS ID front ends will only have two types: High Heat Load Front End (HHLFE) for single beam and Canted Undulator Front End (CUFE) for canted beam. This paper presents the final design of the HHLFE and preliminary design of the CUFE.

Poster THPH24 [1.279 MB]

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THPH26

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

vacuum, 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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THPH27

Mechanical Design of a Compact Non-invasive Wavefront Sensor for Hard X-rays

optics, monitoring, alignment, controls

394

S.P. Kearney, L. Assoufid, W.C. Grizolli, T. Kolodziej, K. Lang, A. Macrander, X. Shi, D. Shu, Yu. Shvyd'ko, W. Wojcik
ANL, Argonne, Illinois, USA

Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DEAC02-06CH11357.
Abstract This work describes mechanical design of a prototype compact wavefront sensor for in situ measurement and monitoring of beam wavefront of hard x-ray beamlines [1]. The system is based on a single-shot grating interferometer [2, 3] and a thin diamond single-crystal beam splitter. The beam splitter is designed to be inserted in the incident and oriented to diffract a fraction of the incident beam bandwidth into the interferometer, for wavefront measurement and reconstruction. The concept is intended to study the feasibility of a non-invasive wavefront sensor for real time wavefront monitoring and diagnostics, with possible application in adaptive mirrors for wavefront preservation and control [1, 4]. The design focus was on compactness to enable easy portability and implementation in a beamline.
* L. Assoufid et al., Rev. Sci. Instrum., 87(5), 052004, 2016
** W. Grizolli et al., SPIE Proc., 1038502, 2017
*** S. Marathe et al., Adaptive X-Ray Optics III, SPIE Proc., 92080D, 2014

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THPH31

Design of a flexible RIXS Setup

detector, alignment, vacuum, experiment

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 THPH31 [0.859 MB]

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THPH32

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

synchrotron, diagnostics, radiation, optics

403

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

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

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THPH36

Engineering Challenges for the NEH2.2 Beamline at LCLS-II

laser, experiment, detector, scattering

409

F.P. O'Dowd, D. Cocco, G.L. Dakovski, J. Defever, S. Guillet, C.L. Hardin, D.S. Morton, T.O. Osier, M.A. Owens, D.W. Rich, L. Zhang
SLAC, Menlo Park, California, USA

SLAC National Accelerator Laboratory is developing LCLS-II, a superconducting linear accelerator based FEL capable of repetition rates up to 1MHz. The NEH2.2 Instrument at LCLS-II will use this combination of exceptionally high flux of monochromatic photons to achieve multidimensional and coherent X-ray techniques that are possible only with X-ray lasers. The challenges, which emanate from delivering the beam from the sub-basement level to the basement of the Near Experimental Hall (NEH) along with the stringent requirements for providing a stable beam at the interaction points, necessitate unique engineering solutions. With this paper we present the conceptual design for the NEH2.2 Instrument along with an overview of the R&D program required to validate design performance. Furthermore, it will additionally show the design of the proposed Liquid Jet Endstation (LJE) and Resonant Inelastic X-Ray Scattering Endstation (RIXS) that will be installed on the beamline. After introducing the context and layout of the beamline, this paper will focus on the technical challenges and present the mechanical design solutions adopted for beam delivery and other strategic components.

Poster THPH36 [2.220 MB]

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FROAMA05

Engineering Design and Commissioning Performance of the ESM and Six Soft X-Ray Beamlines at NSLS-II

optics, diagnostics, MMI, electron

435

Y. Zhu, S. Hulbert, M. Idir, I. Jarrige, S. O'Hara, E. Vescovo
BNL, Upton, Long Island, New York, USA

Two of the five NSLS-II Experimental Tools (NEXT) project insertion-device beamlines developed for the NSLS-II facility at Brookhaven National Laboratory are state-of-the-art soft X-ray beamlines covering the 15 eV- 1500 eV photon energy range. The engineering challenges of these two beamlines included: accurate and realistic optical simulations, nearly perfect optic figure and mechanical/thermal implementation, and advanced diagnostics systems developed in-house. The measured performance (flux, spot size, resolution) of these two beamlines closely matches the calculated values. Here, the engineering design and performance measurements of these two beamlines are presented.

Slides FROAMA05 [15.534 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-FROAMA05

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