MEDSI2018 - List of Keywords (GUI)

Paper	Title	Other Keywords	Page
TUOPMA03	Development of the new UE38 Undulator for the Athos Beamline in SwissFEL	undulator, vacuum, FEL, laser	1
	H. Jöhri, M. Calvi, M. Hindermann, L. Huber, A. Keller, M. Locher, T. Schmidt, X. Wang PSI, Villigen PSI, Switzerland
	For the next beamline, we will profit from the experience of the U15 undulator development, but there are new requirements, because it will be a polarized undulator with a period of 38mm. We are developing a new arrangement of the drives, a further development of the magnet keepers and a vacuumpipe with only 0.2mm of wall thickness. A rough overview was given at Medsi 2016, together with the talk of the U15 Undulator. Meentime, the UE38 is in production and the talk will present the actual status and the lessons we learned during development and the fabrication: - Realization of vacuumchamber with 0.2mm wall thickness - Supportstructure for the vacuumchamber - Precision of manufacturing - Precision of assembling - Design of Magnetkeeper: Differential screw, forces, stiffness
	Slides TUOPMA03 [7.765 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUOPMA03
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TUOPMA08	Deformable RF Fingers with Axial Extension	vacuum, alignment, operation, 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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TUPH19	A Mechanical Undulator Frame to Minimize Intrinsic Phase Errors	vacuum, operation, undulator, 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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WEOAMA03	High-Accuracy Small Roll Angle Measurement Method Based on Dual-Grating Diffraction Heterodyne Interferometer	laser, experiment, real-time, radiation	163
	S. Tang, M. Li, H. Liang, W.F. Sheng, J. Yang IHEP, Beijing, People's Republic of China
	Funding: The work is supported by National Natural Science Foundation of China, NSFC (Grant No. 61505213). Small roll angle (ROLL) is an crucial parameter for the motion performances of ultra-precision guide way often applied in fine mechanics and instruments of synchrotron radiation, such as long trace profiler (LTP). However, it is difficult to be measured by conventional methods including interferometer and autocollimator owing to their low sensitivities in axial direction. There is an orthogonal dilemma between measured direction and angular displacement plane for ROLL measurement. Therefore, a novel method based on dual-grating diffraction heterodyne interferometer is presented, which uses the combining scheme of diffraction grating and heterodyne interferometer to overcome the orthogonal problem. Moreover, the design of differential structure with dual-grating and grating interferometer instead of pure interferometer, is adopted to improve the practicability against the environment, e. g. air fluctuation, inconstant rotation center. It has inherited advantages of high-resolution up to 2nrad, high sampling rate up to 50kHz, and contactless by mathematical modeling and analysis. So, theoretcial and experimental verifications are both implemented to its validation.
	Slides WEOAMA03 [2.304 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOAMA03
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WEOPMA04	Mechanical Design of a New Precision Alignment Apparatus for Compact X-ray Compound Refractive Lens Manipulator	alignment, HOM, detector, operation	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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WEOPMA06	A Compact and Calibratable von Hamos X-Ray Spectrometer Based on Two Full-Cylinder HAPG Mosaic Crystals for High-Resolution XES	optics, radiation, experiment, FEL	189
	I. Holfelder, B. Beckhoff, R. Fliegauf, Y. Kayser, M. Müller, M. Wansleben, J. Weser PTB, Berlin, Germany
	In high-resolution X-ray Emission Spectroscopy (XES) crystal-based Wavelength-Dispersive Spectrometers (WDS) are being applied for characterization of nano- and microscaled materials. Thereby the so called von Hamos geometry provides high detection efficiency due to sagittal focusing using cylindrically bent crystals. To maximize the detection efficiency a full-cylinder optic can be applied. A novel calibratable von Hamos X-ray spectrometer based on up to two full-cylinder optics was developed at the PTB. To realize the full-cylinder geometry Highly Annealed Pyrolytic Graphite (HAPG) [1] was used. Besides its good bending properties this mosaic crystal shows highly integrated reflectivity while offering low mosaicity ensuring high resolving power [2]. The spectrometer enables chemical speciation of elements in an energy range from 2.4 keV up to 18 keV. The design and commissioning of the spectrometer will be presented together with first results using synchrotron radiation as excitation source. The spectrometer combines high efficiency with high spectral resolution (ten times better than in commercial WDS systems) in a compact arrangement also suitable for laboratory arrangements. [1] H. Legall et al. (2006). Proc. FEL, BESSY FRAAU04, 798-801 [2] M. Gerlach et al. (2015). J. Appl. Cryst. 48, 2015, 1381-1390
	Slides WEOPMA06 [7.630 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOPMA06
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WEPH21	A Family of Redundant Positioning Devices for Synchrotron Applications	synchrotron, instrumentation, scattering	249
	G. Olea, N. Huber HUBER Diffraktiontechnik GmbH&Co.KG, Rimsting, Germany
	A family of reconfigurable devices able to work in synchrotron applications, especially in diffractometer environments has been developed. It can provide six (6) or less than six (<6) degrees of freedom (dof) motion capabilities (F<=6) being able to pose a heavy load sample (instruments) with high precision towards an X-ray coming beam. It is based on the Parallel Kinematics (PK) Quatropod concept with redundant actuation (Rd=2) and were built around the fully (F=6dof) basic topology 6-4(213) where 2-actuated and 1, 3-passive joints, respectively. By altering the passive joints dof, structures with less than six dof (F<6) can be obtained, e.g. 5-4[213(2)]/F=5, 4-4[213(1)]/F=4, 3-4[213(0)]/F=3 (3(2) and 3(1)and 3(0) stand for 3dof joint with constrained(less) dof - f=2, 1 or 0/blocked). For a perfect symmetric arrangement and using only P and S (P-prismatic, S-spherical) joints, several useful positioning mechanisms are presented. And, in the design phase, 2dof linear actuators(2P), e.g. XY stages have been proved to be a suitable choice, too. * J.P. Merlet, Parallel Robots Springer (2ed), 2006 G. Olea, D 202014 011 139 U1, DPMA, 2018 * HUBER GmbH, Diff. & Positioning Products, www.xhuber.com, 2018
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH21
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WEPH36	From Plate Screening to Artificial Intelligence: Innovative developments on PROXIMA 2A at Synchrotron SOLEIL	experiment, synchrotron, detector, instrumentation	283
	D. Jeangerard, L. Ciccone, D.K. Desjardins, A. Le Jollec, M. Savko, W. E. Shepard SOLEIL, Gif-sur-Yvette, France A. Haouz Pasteur Institute, Crystallisation and X-ray Diffraction (PF6), Paris, France
	PROXIMA 2A is a high performance 3rd generation synchrotron beamline dedicated to X-ray micro-crystallography on biological macromolecules. Since opening in March 2013, the experimental station has hosted a large number of users who have collected vast amounts of X-ray diffraction images from literally thousands of crystals. In order to streamline the throughput, enhance performance and add functionality, a number of innovative developments have been launched on PROXIMA 2A. These cover all aspects of the beamline, from the practical to the visionary: such as the design, fabrication and implementation of a dedicated high-precision motorized stage to screen crystallization plates for in situ X-ray data collections, and the employment artificial intelligence and computer vision technologies for the detection of samples under liquid nitrogen. Other notable beamline projects include the addition of a vertical translation table for the EIGER X 9M detector to permit the acquisition of ultrahigh (0.6 Å) resolution X-ray data, the incorporation of a miniaturized YAG-coupled photodiode within a beamstop and the determination of the SOC of a recently added kappa arm to the goniometer.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH36
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WEPH41	The Detector Adjustment System of Taiwan Photon Source 24A	detector, alignment, photon, 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
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH41
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THPH12	Granite Benches for Sirius X-ray Optical Systems	alignment, interface, experiment, synchrotron	361
	R.R. Geraldes, C.S.N.C. Bueno, G.V. Claudiano, V.Z. Ferreira, M. Saveri Silva, A. Sikorski, M.S. Souza LNLS, Campinas, Brazil
	Funding: Ministry of Science, Technology, Innovation and Communication (MCTIC) The first set of Sirius beamlines is expected to start operating in early 2019 and over the last few years many optical systems for the X-ray beamlines have been developed in-house at the Brazilian Synchrotron Light Laboratory (LNLS). Starting with the High-Dynamic Double Crystal Monochromator (HD-DCM), passing by the Double Channel-Cut Monochromator (4CM) and continuing with new standard mirror sys-tems, a series of granite benches, based on high-resolution levellers, and a combination of embedded and commercial air-bearings, has been designed for high mechanical and thermal stability. Specifications, designs, and partial results are presented, showing the progressive increase in complexity according to a deterministic design approach.
	Poster THPH12 [3.907 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH12
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THPH15	A New High Precision, Fully Motorized 6-DoF Sample Stage for the ALBA PEEM Endstation	controls, resonance, vacuum, feedback	368
	N. Gonzalez, L. Aballe, A. Carballedo, C. Colldelram, M. Foerster ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	A new 6-DOF sample manipulator has been designed for the ALBA Synchrotron PhotoEmission Electron Microscopy (PEEM) experimental station, based on a commercial Elmitec LEEM 3. The new design includes full motorization of all 6 axes with position feedback, no backlash, and maximized stability, crucial to achieve the best spatial resolution of down to 8 nm (in so-called LEEM mode). The in-plane longitudinal and transversal motions with sub-micron resolution are based on high precision linear guides, while the pitch and roll stages (sample tilt), guided by angular guides, are actuated by a double-flexure system, which enhances the overall rigidity of the system. The vertical stage is composed by a high rigidity recirculating roller screw and cross roller guides. Finally, 360° yaw rotation is supplied by a differentially pumped commercial rotary stage. On top of the stage, the sample support is mounted on a customized DN63CF flange. This support keeps the original functionalities of the sample manipulator and holders, with 6 independent electrical contacts, and the possibility to heat the sample up to 2000 K and cool it to 100 K with an improved liquid nitrogen cooling system.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH15
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THPH18	A Multi-sample Holder for the MSPD Beamline at ALBA	operation, 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]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH18
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THPH19	Engineering Design of the XPD & PDF Beamline Sample Environment for Safe Experimental Use of Hazardous Gases	experiment, FEL, operation, controls	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.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH19
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THPH23	Interlock System for a Magnetic-Bearing Pulse Selector	controls, PLC, software, operation	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.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH23
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THPH37	MAGSTAT V3: An In-Vacuum Variable-Gap Quadrupole with Rotary Permanent Magnets	quadrupole, vacuum, synchrotron, permanent-magnet	412
	V. Pinty, N. Jaouen, F. Marteau, H. Popescu, P. Prout SOLEIL, Gif-sur-Yvette, France
	MAGSTAT is a quadrupole designed to magnetize samples with a variable magnetic field in flow density and in directions. Four rotary permanent magnets allow the user to specify a direction for the field and changing in situ the gap between the poles drives the field intensity. The first prototype was realized in 2016 on the SEXTANTS beamline in the framework of SOLEIL-MAXIV collaboration; a second version has been manufactured for MAXIV SoftImax beamline. This third version shows a significant evolution of the mechanical design, guaranteeing a much better stiffness in high field configurations. Samples up to Ø74mm can be placed in this quadrupole, and the tiny ones which may fit in a Ø10mm circle or smaller, can be magnetized with a 1T local field. The angle of each magnet is driven by a dedicated stepper motors with a big reduction ratio. The total gap is ensured by a single motor, and its motion is symmetrically transferred to the magnets through an Archimedean spiral. The first prototype is installed at COMET endstation dedicated to the coherent scattering of soft X-ray in transmission for imaging magnetic materials via the Fourier Transform Holography or ptychography techniques.
	Poster THPH37 [57.424 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH37
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THPH39	Novel Comprehensive UHV Lens Changer at the PETRA III Beamlines P22, P23 and P24	alignment, vacuum, synchrotron, focusing	418
	J. Raabe, K. Ederer, R. Grifone, D. Novikov, C. Schlüter DESY, Hamburg, Germany
	The design of a compact UHV-compatible X-ray transfocator for beryllium compound refractive lenses (CRL) is presented. CRLs are nowadays commonly applied as focusing elements in a lot of techniques based on synchrotron radiation. Aim of the current project was the development of a low-maintenance lens changer for beam focusing, collimation and aperture matching. The paper describes the new lens changer designs for the reliable use under ultrahigh vacuum conditions. Precise and reproducible alignment is achieved by pneumatic actuators that press the lens stacks against a high precision prism. All actuators and position sensors are placed outside the UHV vessel. Alignment is facilitated by integrated beam monitors and alignment apertures. We discuss two variants of the device, one designed for 2D lenses and the other one operating with 1D lenses. In the current version, the 2D lens changer adapts 12 stacks of up to 8 single lenses each, and the 1D variant ' 8 single lenses or apertures.
	Poster THPH39 [0.190 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH39
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FROAMA07	ESRF Double Crystal Monochromator Prototype Project	SRF, vacuum, controls, radiation	440
	R. Baker, D. Baboulin, R. Barrett, P. Bernard, G. Berruyer, J. Bonnefoy, M. Brendike, P.M. Brumund, Y. Dabin, L. Ducotté, H. Gonzalez, G. Malandrino, P. Marion, O. Mathon, T. Roth, R. Tucoulou ESRF, Grenoble, France
	Spectroscopy beamlines at the ESRF are equipped with a generic model of double crystal monochromator, originally acquired in the 1990's. After over 15 years of continuous service, their conception, although pioneering 20 years ago, can no longer meet the challenge of present and future scientific goals in terms of position and angular stability, thermal stability, cooling system, vibration, control and feedback, particularly in view of the ESRF - EBS upgrade. Considering the above issues, a feasibility phase was launched to develop a prototype DCM dedicated to future spectroscopy applications at the ESRF. Specifications : derived from expected performance of the EBS upgrade and scientific objectives - are extremely challenging, especially in terms of mechanical and thermal stability and impose the adoption of several innovative design strategies. The prototype is currently in the assembly phase and tests of the complete system are planned before the end of 2018. An overview of the DCM prototype project will be given, including specifications, major design options implemented and various validated concepts. Current project status and first test results will also be presented.
	Slides FROAMA07 [24.528 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-FROAMA07
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Paper

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Other Keywords

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TUOPMA03

Development of the new UE38 Undulator for the Athos Beamline in SwissFEL

undulator, vacuum, FEL, laser

1

H. Jöhri, M. Calvi, M. Hindermann, L. Huber, A. Keller, M. Locher, T. Schmidt, X. Wang
PSI, Villigen PSI, Switzerland

For the next beamline, we will profit from the experience of the U15 undulator development, but there are new requirements, because it will be a polarized undulator with a period of 38mm. We are developing a new arrangement of the drives, a further development of the magnet keepers and a vacuumpipe with only 0.2mm of wall thickness. A rough overview was given at Medsi 2016, together with the talk of the U15 Undulator. Meentime, the UE38 is in production and the talk will present the actual status and the lessons we learned during development and the fabrication: - Realization of vacuumchamber with 0.2mm wall thickness - Supportstructure for the vacuumchamber - Precision of manufacturing - Precision of assembling - Design of Magnetkeeper: Differential screw, forces, stiffness

Slides TUOPMA03 [7.765 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUOPMA03

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TUOPMA08

Deformable RF Fingers with Axial Extension

vacuum, alignment, operation, 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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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUOPMA08

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TUPH19

A Mechanical Undulator Frame to Minimize Intrinsic Phase Errors

vacuum, operation, undulator, 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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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH19

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WEOAMA03

High-Accuracy Small Roll Angle Measurement Method Based on Dual-Grating Diffraction Heterodyne Interferometer

laser, experiment, real-time, radiation

163

S. Tang, M. Li, H. Liang, W.F. Sheng, J. Yang
IHEP, Beijing, People's Republic of China

Funding: The work is supported by National Natural Science Foundation of China, NSFC (Grant No. 61505213).
Small roll angle (ROLL) is an crucial parameter for the motion performances of ultra-precision guide way often applied in fine mechanics and instruments of synchrotron radiation, such as long trace profiler (LTP). However, it is difficult to be measured by conventional methods including interferometer and autocollimator owing to their low sensitivities in axial direction. There is an orthogonal dilemma between measured direction and angular displacement plane for ROLL measurement. Therefore, a novel method based on dual-grating diffraction heterodyne interferometer is presented, which uses the combining scheme of diffraction grating and heterodyne interferometer to overcome the orthogonal problem. Moreover, the design of differential structure with dual-grating and grating interferometer instead of pure interferometer, is adopted to improve the practicability against the environment, e. g. air fluctuation, inconstant rotation center. It has inherited advantages of high-resolution up to 2nrad, high sampling rate up to 50kHz, and contactless by mathematical modeling and analysis. So, theoretcial and experimental verifications are both implemented to its validation.

Slides WEOAMA03 [2.304 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, operation

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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WEOPMA06

A Compact and Calibratable von Hamos X-Ray Spectrometer Based on Two Full-Cylinder HAPG Mosaic Crystals for High-Resolution XES

optics, radiation, experiment, FEL

189

I. Holfelder, B. Beckhoff, R. Fliegauf, Y. Kayser, M. Müller, M. Wansleben, J. Weser
PTB, Berlin, Germany

In high-resolution X-ray Emission Spectroscopy (XES) crystal-based Wavelength-Dispersive Spectrometers (WDS) are being applied for characterization of nano- and microscaled materials. Thereby the so called von Hamos geometry provides high detection efficiency due to sagittal focusing using cylindrically bent crystals. To maximize the detection efficiency a full-cylinder optic can be applied. A novel calibratable von Hamos X-ray spectrometer based on up to two full-cylinder optics was developed at the PTB. To realize the full-cylinder geometry Highly Annealed Pyrolytic Graphite (HAPG) [1] was used. Besides its good bending properties this mosaic crystal shows highly integrated reflectivity while offering low mosaicity ensuring high resolving power [2]. The spectrometer enables chemical speciation of elements in an energy range from 2.4 keV up to 18 keV. The design and commissioning of the spectrometer will be presented together with first results using synchrotron radiation as excitation source. The spectrometer combines high efficiency with high spectral resolution (ten times better than in commercial WDS systems) in a compact arrangement also suitable for laboratory arrangements.
[1] H. Legall et al. (2006). Proc. FEL, BESSY FRAAU04, 798-801
[2] M. Gerlach et al. (2015). J. Appl. Cryst. 48, 2015, 1381-1390

Slides WEOPMA06 [7.630 MB]

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WEPH21

A Family of Redundant Positioning Devices for Synchrotron Applications

synchrotron, instrumentation, scattering

249

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

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

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WEPH36

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

experiment, synchrotron, detector, instrumentation

283

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

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

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WEPH41

The Detector Adjustment System of Taiwan Photon Source 24A

detector, alignment, photon, 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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THPH12

Granite Benches for Sirius X-ray Optical Systems

alignment, interface, experiment, synchrotron

361

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

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

Poster THPH12 [3.907 MB]

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THPH15

A New High Precision, Fully Motorized 6-DoF Sample Stage for the ALBA PEEM Endstation

controls, resonance, vacuum, feedback

368

N. Gonzalez, L. Aballe, A. Carballedo, C. Colldelram, M. Foerster
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

A new 6-DOF sample manipulator has been designed for the ALBA Synchrotron PhotoEmission Electron Microscopy (PEEM) experimental station, based on a commercial Elmitec LEEM 3. The new design includes full motorization of all 6 axes with position feedback, no backlash, and maximized stability, crucial to achieve the best spatial resolution of down to 8 nm (in so-called LEEM mode). The in-plane longitudinal and transversal motions with sub-micron resolution are based on high precision linear guides, while the pitch and roll stages (sample tilt), guided by angular guides, are actuated by a double-flexure system, which enhances the overall rigidity of the system. The vertical stage is composed by a high rigidity recirculating roller screw and cross roller guides. Finally, 360° yaw rotation is supplied by a differentially pumped commercial rotary stage. On top of the stage, the sample support is mounted on a customized DN63CF flange. This support keeps the original functionalities of the sample manipulator and holders, with 6 independent electrical contacts, and the possibility to heat the sample up to 2000 K and cool it to 100 K with an improved liquid nitrogen cooling system.

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THPH18

A Multi-sample Holder for the MSPD Beamline at ALBA

operation, 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, operation, controls

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, software, operation

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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THPH37

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

quadrupole, vacuum, synchrotron, permanent-magnet

412

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

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

Poster THPH37 [57.424 MB]

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THPH39

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

alignment, vacuum, synchrotron, focusing

418

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

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

Poster THPH39 [0.190 MB]

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FROAMA07

ESRF Double Crystal Monochromator Prototype Project

SRF, vacuum, controls, radiation

440

R. Baker, D. Baboulin, R. Barrett, P. Bernard, G. Berruyer, J. Bonnefoy, M. Brendike, P.M. Brumund, Y. Dabin, L. Ducotté, H. Gonzalez, G. Malandrino, P. Marion, O. Mathon, T. Roth, R. Tucoulou
ESRF, Grenoble, France

Spectroscopy beamlines at the ESRF are equipped with a generic model of double crystal monochromator, originally acquired in the 1990's. After over 15 years of continuous service, their conception, although pioneering 20 years ago, can no longer meet the challenge of present and future scientific goals in terms of position and angular stability, thermal stability, cooling system, vibration, control and feedback, particularly in view of the ESRF - EBS upgrade. Considering the above issues, a feasibility phase was launched to develop a prototype DCM dedicated to future spectroscopy applications at the ESRF. Specifications : derived from expected performance of the EBS upgrade and scientific objectives - are extremely challenging, especially in terms of mechanical and thermal stability and impose the adoption of several innovative design strategies. The prototype is currently in the assembly phase and tests of the complete system are planned before the end of 2018. An overview of the DCM prototype project will be given, including specifications, major design options implemented and various validated concepts. Current project status and first test results will also be presented.

Slides FROAMA07 [24.528 MB]

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