Keyword: controls
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MOPE02 Studies on Flow-Induced Vibrations for the New High-Dynamics DCM for Sirius ion, experiment, acceleration, synchrotron 8
 
  • R.M. Caliari, O.R. Bagnato, F.R. Francisco, R.R. Geraldes, R.L. Parise, M. Saveri Silva, D.O. Tavares, L.,Jr. de Souza
    LNLS, Campinas, Brazil
  • T.A.M. Ruijl
    MI-Partners, Eindhoven, The Netherlands
  
  The monochromator is known to be one of the most critical optical elements of a synchrotron beamline, since it directly affects the beam quality with respect to energy and position. Naturally, the new 4th generation machines, with their small emittances, start to bring about higher stability performance requirements, in spite of factors as high power loads, power load variation, and vibration sources. A new high-dynamics DCM (Double Crystal Monochromator) is under development at the Brazilian Light Source for the Sirius EMA beamline (Extreme Condition X-ray Methods of Analysis). The disturbances induced by the coolant flows are known to be among the most detrimental influences to a DCM performance, however, quantitative force numbers involved in such disturbances are not commonly investigated. According to the novel dynamic concept, these forces should be predictably translated into stability performance. Therefore, experimental setups that allow the indirect measurement of such forces in conditions close to those of operation were designed. The results comparing different indirect cooling profiles and manufacturing processes (brazing and additive manufacturing) are shown.  
poster icon Poster MOPE02 [3.064 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE02  
About • paper received ※ 09 September 2016       paper accepted ※ 15 September 2016       issue date ※ 22 June 2017  
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MOPE05 Mechanical Design of Secondary Source Slits for Hard X-ray Beamlines at Taiwan Photon Source ion, scattering, site, photon 12
 
  • H.Y. Yan, C.H. Chang, S.H. Chang, C.Y. Chen, C.Y. Huang, J.M. Lin, D.G. Liu, D.-J. Wang
    NSRRC, Hsinchu, Taiwan
  
  The secondary source slits have been developed for specific hard X-ray beam-lines at Taiwan Photon Source. Especially for Coherent X-ray Scattering and X-ray Nanoprobe beam-lines, severe specifications of the slits are more necessary to define proper beam sizes in horizontal and vertical directions at sample. The opening size of each pair of slits assembled orthogonally is usually needed to range within several microns, so the UHV-compatible piezo-driven stages with closed-loop system were adopted for the purposes of fine adjustment, precise positional accuracy and repeatability. To reduce X-ray scattering effect, the rectangular single-crystal film was bonded on the edge of the slit blade. The machined rotary weak-link structure and piezo-driven actuators were used to slightly adjust parallelism of each pair of the blades with the method of single-slit diffraction. To enhance structural and thermal stability, the granite plinths with specified shape were designed and the precise temperature controlling system will be set up recently. The overall design, mechanical specifications and procedure of testing for secondary source slits will be introduced in this paper.  
poster icon Poster MOPE05 [0.795 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE05  
About • paper received ※ 09 September 2016       paper accepted ※ 14 September 2016       issue date ※ 22 June 2017  
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MOPE08 The LNLS Metrology Building ion, SRF, instrumentation, synchrotron 17
 
  • H.G.P. de Oliveira, C. Esper Neto, P.T. Fonseca, R.R. Geraldes, B.C. Meyer, M.A. Pereira, G.L.M.P. Rodrigues, L. Sanfelici, L.G. da Silva
    LNLS, Campinas, Brazil
  • L. Buccianti, M.H.A. Costa
    Biotec Controle Ambiental, São José dos Campos, SP, Brazil
  • C. Prudente
    Prudente Engenharia Ltda., Uberlândia, Minas Gerais, Brazil
  
  Funding: Brazilian Ministry of Science, Technology, Innovation and Communication.
The increasing demands of instrumentation projects for SIRIUS require more sensitive equipment to be devel-oped and characterized in theμand nanometer scale. To achieve this level of precision it is necessary to work within a controlled environment, minimizing instabilities and disturbance effects such as temperature variation and vibrations. Based on metrology labs as those at BESSY, ESRF, DLS and others, a new facility is currently under final construction stage at the LNLS, which will be dedi-cated to high precision optical and mechanical metrolo-gies. This work describes in detail the project of the new LNLS Metrology Building. 		 
poster icon Poster MOPE08 [2.829 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE08  
About • paper received ※ 09 September 2016       paper accepted ※ 15 September 2016       issue date ※ 22 June 2017  
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MOPE13 The 20m/s CERN Fast Vacuum Wire Scanner Conceptual Design and Implementation ion, vacuum, feedback, ISOL 29
 
  • J. Herranz
    Proactive Research and Development, Barcelona, Spain
  • W. Andreazza, N. Chritin, B. Dehning, J. Emery, D. Gudkov, P. Magagnin, S. Samuelsson, J.L. Sirvent, R. Veness
    CERN, Geneva, Switzerland
  • A. Barjau
    Universitat Politécnica de Catalunya, Barcelona, Spain
  
  In the next years the luminosity of the LHC will be significantly increased. Therefore a much higher accuracy of beam profile measurement than actually achievable by the current wire scanner is required. The new performance demands a wire travelling speed up to 20 m/s and a position measurement accuracy of the order of 1 µm. In order to minimize the error source of the wire position measurement, a challenging concept has been developed which consists of the placement of the motor rotor and the angular position sensor in vacuum. The implementation of this new concept requires the use of a magnetic brake, hybrid vacuum bearings, the design and production of very thin (<0.5mm) wall vacuum chamber regions and the production of titanium components by 3D additive technologies. The implementation of this new concept has required different optimization processes as the structural optimization under dynamic load of the most critical rotating elements or the optimization of the control system and the motion pattern. This contribution gives an overview of the new device design and shows the different technical solution applied to develop the new concept in a successful way.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE13  
About • paper received ※ 10 September 2016       paper accepted ※ 20 September 2016       issue date ※ 22 June 2017  
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MOPE15 Cam Mover Alignment System Positioning with Wire Position Sensor Feedback for CLIC ion, target, alignment, electron 32
 
  • J. Kemppinen, Z.S. Kostka, H. Mainaud Durand
    CERN, Geneva, Switzerland
  • J. Kemppinen
    ETH, Zurich, Switzerland
  
  Compact Linear Collider (CLIC) is a study of an electron-positron collider with nominal energy of 3 TeV and luminosity of 2·1034 cm-2·s-1. The luminosity goal leads to stringent alignment requirements for single quadrupole magnets. Vertical and lateral offset deviations with regards to a given orbit reference in both ends of a quadrupole shall be below 1 µm and quadrupole roll deviation shall be below 100 µrad. Translation in the direction of particle beam is not controlled but mechanically locked. A parallel kinematic platform based on cam movers was chosen as system for detailed studies. Earlier studies have shown that cam movers can reach the CLIC requirements through an iterative process. The paper presents new modular off-the-shelf control electronics and software including three optional positioning algorithms based on iterations as well as a more advanced algorithm which can reach target position in one movement. The advanced algorithm reads wire position sensors (WPS), calculates quadrupole orientation based on the readings and updates the remaining trajectory during motion. All of the optional positioning methods reach the CLIC positioning requirements within minutes.  
poster icon Poster MOPE15 [0.425 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE15  
About • paper received ※ 09 September 2016       paper accepted ※ 14 September 2016       issue date ※ 22 June 2017  
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MOPE17 OCTOGLIDE - Table Positioning Device for Diffraction Applications ion, software, GUI, synchrotron 38
 
  • G. Olea, N. Huber
    HUBER Diffraktiontechnik GmbH&Co.KG, Rimsting, Germany
  
  A new Table Positioning Device(TPD) for high precision and heavy load manipulations has been developed. Conceived as an alternative to the precision hexapods it fulfils the gap of sample (and/or, instruments) positioning in small (height) available working spaces of synchrotron Diffractometers (Dm). The concept is based on a Redundant Parallel Kinematic Structure (Rd-PKS) with four (4) legs having 2 dof active joints (actuators). In this Proof of Functionality (PoF) step, a stacked solution has been adopted for actuators design using the existent XY translation Positioning Units (Pu). The symmetrically modular 6-4(PP)PS precision mechanism - OCTOGLIDE(OG) having eight (8) gliding actuators (P) is implying also a pair of wedges - Elevation (El) and socket/ball - Guiding (G) Pu, as passive joints (P and S) forming one of the Positioning modules (Pm). Spatial positions can be reached without any singularities and planar motions along/around X or Y axis are performed very intuitively with some of the actuators (decoupled) motion. The first tests of the prototype are revealing both, high accuracy (straightness, flatness, etc) and stiffness capabilities.
* Merlet JP, Parallel robots, Springer, 2006 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE17  
About • paper received ※ 09 September 2016       paper accepted ※ 19 September 2016       issue date ※ 22 June 2017  
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MOPE18 Real-Time Motor Control System for Beamlines ion, FPGA, hardware, real-time 41
 
  • C.F. Chang
    NSRRC, Hsinchu, Taiwan
  
  To improve the stability and accuracy of motor control system for beamlines, the beamlines with motor adjustment mechanism collocate with the real-time firmware motor control system through the high-definition motor mechanism. Because the real-time motor control system does not need to be connected with the computer for a long time, it improves the speed, stability and accuracy of closed loop operation and thus promotes the controlling ability of motor. As a result, the real-time motor control system will improve the stability and accuracy of the entire motor control system with beamlines.  
poster icon Poster MOPE18 [2.797 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE18  
About • paper received ※ 09 September 2016       paper accepted ※ 22 September 2016       issue date ※ 22 June 2017  
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MOPE19 Mechatronics Concepts for the New High-Dynamics DCM for Sirius ion, synchrotron, alignment, resonance 44
 
  • R.R. Geraldes, R.M. Caliari, G.B.Z.L. Moreno
    LNLS, Campinas, Brazil
  • M.J.C. Ronde, T.A.M. Ruijl, R.M. Schneider
    MI-Partners, Eindhoven, The Netherlands
  
  Funding: Brazilian Ministry of Science, Technology, Innovation and Communication
The monochromator is known to be one of the most critical optical elements of a synchrotron beamline. The new 4th generation machines, with emittances in the range of order of 100 pm rad, require even higher stability performances, in spite of the still conflicting factors such as high power loads, power load variation, and vibration sources. A new high-dynamics DCM is under development at LNLS for the future X-ray undulator and superbend beamlines of Sirius. Aiming at inter-crystal stability of a few tens of nrad and considering the limitations of the current DCM implementations, several aspects of DCM engineering are being revisited. The system concept is chosen such that a control bandwidth in the order of 200 to 300 Hz can be achieved. This requires well-designed system dynamics, which can be realized by applying a fundamentally different architecture than that used in common DCM designs, based on principles used in ultra-precision systems for semiconductor manufacturing. As a result, known disturbances can be attenuated or suppressed, and internally excited modes can be effectively handled. The mechatronics concepts and analyses, including the metrological details, are shown. 		 
poster icon Poster MOPE19 [5.423 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE19  
About • paper received ※ 11 September 2016       paper accepted ※ 19 September 2016       issue date ※ 22 June 2017  
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MOPE22 Mechanical Design of the MID Split-and-Delay Line at the European XFEL ion, FEL, alignment, laser 50
 
  • B. Friedrich, S. Eisebitt, T. Noll
    MBI, Berlin, Germany
  • S. Eisebitt, B. Friedrich
    Technische Universität Berlin, Berlin, Germany
  • W. Lu, T. Roth
    European XFEL, Schenefeld, Germany
  • A. Madsen
    XFEL. EU, Hamburg, Germany
  
  A new split-and-delay line (SDL) is under development for the Materials Imaging and Dynamics (MID) end station at the European XFEL.* The device utilises Bragg reflection to provide pairs of X-ray pulses with an energy of (5 - 10) keV and a continuously tunable time delay of (-10 - 800) ps - thus allowing zero-crossing of the time delay. The mechanical concept features separate positioning stages for each optical element. Those are based on a serial combination of coarse motion axes and a fine alignment 6 DoF Cartesian parallel kinematics**. That allows to meet the contradictory demands of a fast long-range travel of up to 1000 mm and in the same time a precise alignment with a resolution in the nanometer range. Multiple laser interferometers monitor the position of the optical elements and allow an active control of their alignment. All optical elements and mechanics will be installed inside an UHV chamber, including the interferometer and about 100 stepper motors. With this paper we present the mechanical design for the SDL. It will additionally show the design of a prototype of a positioning stage which allows extensive testing of the implemented concepts and techniques.
* A. Madsen et al., Technical Design Report: Scientific Instrument MID, 2013.
** T. Noll et al., Parallel kinematics for nanoscale Cartesian motions, Precision Engineering, vol. 33, no. 3, 2009. 		 
poster icon Poster MOPE22 [4.691 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE22  
About • paper received ※ 11 September 2016       paper accepted ※ 14 September 2016       issue date ※ 22 June 2017  
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MOPE38 Milliprobe Scanner Station ion, detector, alignment, synchrotron 93
 
  • J. Divitcos, M. De Jonge, D. Howard, J. McKinlay
    ANSTO, Menai, New South Wales, Australia
  
  The research team at the Commonwealth Scientific & Industrial Research Organisation, Clayton CSIRO) have developed a high energy detector referred to as the Maia. The rapid scanning, high resolution detector offers technological advances, including non-invasive technical study of highly valued artworks. A vital application of the Maia detector is scanning x-ray fluorescence microscopy for obtaining the elemental composition of a large number of materials. The innovative detector allows connection between scientists & art communities to increase their understanding of historical artworks, broadening the field of authentication and potentially aiding the fight against art forgery as well as historical information. We have designed a new dedicated station that offers improvements in high stability, motion control and mounting. It is designed to support & scan various samples in size as well as shape powered by X & Y stages. A slide & hold clamping concept has been implemented which provides easy & rapid assembling of samples. This arrangement provides excellent interchangeability, supporting a variety of planar & non-planar samples for scanning.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE38  
About • paper received ※ 07 September 2016       paper accepted ※ 29 September 2016       issue date ※ 22 June 2017  
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MOPE43 Hydraulic Failure Caused by Air in Pipelines of the Experimental Area Ring of ALBA Synchrotron Light Source: Research, Simulations and Solutions ion, experiment, simulation, operation 105
 
  • L. Macià
    UPC, Barcelona, Spain
  • J.J. Casas, C. Colldelram, M. Quispe
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  After five years in operation of the ALBA Synchrotron Light Source a hydraulic failure caused a maximum decreasing of water flow about 40% of its nominal value, hampering the refrigeration of the local components. The problem was mainly caused by the air accumulated in pipes due to very low velocities of water flow. A literature review was conducted about the minimum water flow velocity for removing air in pipelines as design criteria. The aim of this work is to develop hydraulic solutions in order to achieve the minimum flowrate in pipelines of the Experimental Area (EA) ring. In the short term it is proposed to install a controlled bypass in the EA. A numerical simulation using the software Pipe Flow Expert has been implemented in order to determine the requirements of the bypass that works under different conditions to assure a minimum flowrate all along the ring. The velocity map in EA ring is simulated for different scenarios: 180 and 360 degrees distribution for both clockwise and anticlockwise rotation. For the long term a design of pipes with variable cross section is proposed which optimizes the flow velocity magnitude in EA ring in agreement with the design criteria.  
poster icon Poster MOPE43 [1.347 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE43  
About • paper received ※ 10 September 2016       paper accepted ※ 15 September 2016       issue date ※ 22 June 2017  
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TUAA01 Precision Mechanical Design of a Miniature Dynamic Mirror Bender for the SSRF Beamline Upgrade Project ion, SRF, synchrotron-radiation, synchrotron 108
 
  • D. Shu, J.W.J. Anton, S.P. Kearney
    ANL, Argonne, Illinois, USA
  • J.W.J. Anton
    University of Illinois at Chicago, Chicago, USA
  • A. Li, C. Mao, Y. Pan
    SINAP, Shanghai, People’s Republic of China
  
  Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357 and Argonne SPP project 85·1077. Work at SINAP supported by NNSF of China No. U1332120.
Dynamic mirror benders which enable high precision figuring of planar substrates for x-ray focusing are widely used as conventional optical equipment in various synchrotron radiation beamlines. Especially, in cases for x-ray focusing optics coated with multilayers in a Kirkpatrick-Baez configuration as the final focusing elements immediately upstream of the sample, the dynamic mirror benders provide high precision figuring to allow the mirror figure to be tuned to optimize the focusing at different incidence angles to cover a wide energy range *. Recently, collaboration between Argonne National Laboratory and Shanghai Institute of Applied Physics (SINAP) has produced designs of a new miniature dynamic mirror bender with Argonne’s laminar nanopositioning flexure technique ** for beamline upgrade project at the Shanghai Synchrotron Radiation Facility (SSRF). The mechanical design and finite element analyses of the miniature dynamic mirror bender, as well as its initial mechanical test results with laser interferometer are described in this paper.
* R. Barrett, J. Härtwig, C. Morawe et al, Synchrotron Radiation News, 23, No.1, 36-42(2010)
** U.S. Patent granted No. 6,984, 335, D. Shu, T. S. Toellner, and E. E. Alp, 2006.
 		 
slides icon Slides TUAA01 [7.411 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUAA01  
About • paper received ※ 10 September 2016       paper accepted ※ 23 September 2016       issue date ※ 22 June 2017  
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TUAA02 Earth, Wind, and Fire: The New Fast Scanning Velociprobe ion, optics, GUI, coupling 112
 
  • C.A. Preissner, J. Deng, C. Jacobsen, B. Lai, F.S. Marin, J. Maser, S.T. Mashrafi, C. Roehrig, S. Sullivan, S. Vogt
    ANL, Argonne, Illinois, USA
  
  Funding: Argonne is managed by UChicago Argonne, LLC, for the U.S. Department of Energy under contract DE-AC02-06CH11357.
The Advanced Photon Source Upgrade (APS-U) project will include a suite of new beam-lines. In preparation for this, a team at the APS is developing an X-ray microscope with a novel granite (Earth), air bearing (Wind) supported stage to take advantage of the two orders of magnitude increased coherent flux (Fire) that will be available with the APS-U. The instrument will be able to operate as a scanning probe for fluorescence microscopy and as a ptychoprobe for the ultimate in spatial resolution. Both are combined with tomography. The goals for the instrument while operating at the current APS are to demonstrate fast scanning of large samples at high resolution and ptychography at the highest resolution (speed and resolution limited by available flux). This presentation will discuss the unique mechanics, interferometry scheme, the advanced scanning control, and instrument integration. 		 
slides icon Slides TUAA02 [25.518 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUAA02  
About • paper received ※ 10 September 2016       paper accepted ※ 20 September 2016       issue date ※ 22 June 2017  
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TUBA01 The Design of a Precision Mechanical Assembly for a Hard X-ray Polarizer ion, experiment, simulation, synchrotron-radiation 116
 
  • S.P. Kearney, D. Shu, T.S. Toellner
    ANL, Argonne, Illinois, USA
  
  Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357
Hard x-ray polarisers are commonly applied in synchrotron radiation research to produce photons in a pure polarization state, and as polarization filters to analyse the photon’s polarization state after their interaction with a sample medium. We present the design of a mechanical assembly suitable for a hard X-ray polariser that requires multiple degrees of freedom with the base stage capable of handling at least 2-3 kg loads. The intermediary stages (roll, yaw, and translation directions) consist of commercially available tip/tilt and translational stages (Kohzu Precision Co., LTD). However, the requirements of the pitch stage are much more demanding and require a custom-designed flexure-based rotation stage. The design and analysis of this flexure-based rotation stage will be discussed in this study. This will include FEA analysis of the dynamic response and rotation range capabilities which will then be compared to mechanical performance test results using laser interferometers and accelerometer sensors. 		 
slides icon Slides TUBA01 [1.586 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUBA01  
About • paper received ※ 09 September 2016       paper accepted ※ 20 September 2016       issue date ※ 22 June 2017  
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TUBA04 Mechanical Design and Development of Compact Linear Nanopositioning Flexure Stages with Centimeter-Level Travel Range and Nanometer-Level Resolution ion, GUI, laser, photon 124
 
  • D. Shu, J.W.J. Anton, S.P. Kearney, B. Lai, W. Liu, J. Maser, C. Roehrig, J.Z. Tischler
    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.
Nanopositioning techniques present an important capability to support the state-of-the-art synchrotron radiation instrumentation research for the APS operations and upgrade project. To overcome the performance limitations of precision ball-bearing-based or roller-bearing-based linear stage systems, two compact linear nanopositiioning flexure stages have been designed and developed at the APS with centimeter-level travel range and nanometer-level resolution for x-ray experimental applications. The APS T8-54 linear flexure stage is designed to perform a precision wire scan as a differential aperture for the 3-D diffraction microscope at the APS sector 34, and the APS T8-56 linear flexure stage is designed for a horizontal sample scanning stage for a hard x-ray microscope at the APS sector 2. Both linear flexure stages are using a similar improved deformation compensated linear guiding mechanism which was developed initially at the APS for the T8-52 flexural linear stage *. The mechanical design and finite element analyses of the APS T8-54 and T8-56 flexural stages, as well as its initial mechanical test results with laser interferometer are described in this paper.
* U.S. Patent granted No. 8,957, 567, D. Shu, S. Kearney, and C. Preissner, 2015.
 		 
slides icon Slides TUBA04 [7.057 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUBA04  
About • paper received ※ 10 September 2016       paper accepted ※ 20 September 2016       issue date ※ 22 June 2017  
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TUCA05 The New High Dynamics DCM for Sirius ion, synchrotron, GUI, feedback 141
 
  • R.R. Geraldes, R.M. Caliari, G.B.Z.L. Moreno, L. Sanfelici, M. Saveri Silva, N.M. Souza Neto, H.C.N. Tolentino, H. Westfahl Jr.
    LNLS, Campinas, Brazil
  • T.A.M. Ruijl, R.M. Schneider
    MI-Partners, Eindhoven, The Netherlands
  
  Funding: Brazilian Ministry of Science, Technology, Innovation and Communication
The monochromator is known to be one of the most critical optical elements of a synchrotron beamline, since it directly affects the beam quality with respect to energy and position. The new 4th generation machines, with emittances in the range of order of 100 pm rad, require even higher stability performances, in spite of the still conflicting factors such as high power loads, power load variation, and vibration sources. A new high-dynamics DCM (Double Crystal Monochromator) is under development at the Brazilian Synchrotron Light Laboratory for the future X-ray undulator and superbend beamlines of Sirius. Aiming at an inter-crystal stability of a few tens of nrad (even during the Bragg angle motion for flyscans) and considering the limitations of current DCM implementations, several aspects of the DCM engineering are being revisited. In order to achieve a highly repeatable dynamic system, with a servocontrol bandwidth in the range of 200 Hz to 300 Hz, solutions are proposed for a few topics, including: actuators and guides, metrology and feedback, LN2 indirect cooling, crystal clamping, thermal management and shielding. The concept of this high-dynamics DCM will be presented. 		 
slides icon Slides TUCA05 [2.254 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUCA05  
About • paper received ※ 11 September 2016       paper accepted ※ 20 September 2016       issue date ※ 22 June 2017  
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TUPE13 Numerical Simulation of the ALBA Synchrotron Light Source Cooling System Response to Pump Start-Up and Shut-Down ion, synchrotron, simulation, network 187
 
  • X. Escaler, D. Juan Garcia
    UPC, Barcelona, Spain
  • J.J. Casas, C. Colldelram, M. Prieto, M. Quispe
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  The ALBA Synchrotron Light Source cooling system is submitted to regular pump start-ups and shut-downs. Moreover, pumps can trip due to motor power failures. As a result, the piping system can be subjected to surges and pressure oscillations. The 1D thermo-fluid simulation software Flowmaster has been used to predict these transient conditions taking into account the fluid compressibility, the pipe elasticity, the characteristic time response of the check valves and the pump/motors moments of inertia. During pump start-ups, significant pressure rises are detected that can be reduced by readjusting the PID controller parameters. Unexpected pump shut-downs do not appear to provoke significant water hammer conditions. However, pressure fluctuations are generated mainly in the same pumping line but also in the rest of the system due to the particular common return configuration. In all the cases the pressure regulation mechanisms acting on the pump rotating speeds serve to attenuate the consequences of these transients. Finally, the feasibility of the model to simulate the effect on the system response of trapped air inside the pipes has also been evaluated.  
poster icon Poster TUPE13 [0.743 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE13  
About • paper received ※ 07 September 2016       paper accepted ※ 22 September 2016       issue date ※ 22 June 2017  
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TUPE22 Low-Order Aberrations Correction of Extreme Ultraviolet Imaging Objective with Deformable Multilayer Mirrors ion, alignment, optics, software 213
 
  • M. Toyoda, R. Sunayama, M. Yanagihara
    Tohoku University, Institute of Multidisciplinary Research for Advanced Materials, Sendai, Japan
  
  For at-wavelength observation of a lithography mask, recently, we proposed an EUV microscope consisting of multilayer-mirror objective (operating wavelength: 13.5 nm, numerical aperture: 0.25). To provide diffraction-limited spatial resolution below 30 nm, reduction of wave aberrations of low order, i.e., spherical aberration, coma, and astigmatism, should be key technical challenge for the microscope. In this paper, firstly, we describe detail of optical design and instrumentation of the point diffraction interferometer (PDI), so as to provide high enough sensing accuracy of 100 pm, which would be required for an optical axis adjustment of the EUV objective. Next, experimental results of wave front correction on the EUV objective are reported. We corrected spherical aberration and coma by precisely aligning an optical axis of the mirrors, while effects of astigmatism were also minimized with a figure-deformable mirror which can control radius of curvature in two mutually orthogonal directions. We confirmed that these low order terms should be less than 0.3 nm RMS.  
poster icon Poster TUPE22 [3.217 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE22  
About • paper received ※ 06 September 2016       paper accepted ※ 22 September 2016       issue date ※ 22 June 2017  
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TUPE33 NSLS-II Beam Aperture Slit Vibration Studies ion, vacuum, alignment, storage-ring 239
 
  • C.J. Spataro, C. Amundsen, H. Bassan, S.K. Sharma
    BNL, Upton, Long Island, New York, USA
  
  Beam aperture slits mounted on stepper-motor driven X-Y stages are used in NSLS-II frontends to define the beam size and to limit thermal loads on downstream optical components. The X-Y stages have positional and resolution requirements of 1 µm and 0.1 µm, respectively. This is achieved by micro-stepping the stepper motor by a Delta-Tau GeoBrick-LV-NSLS-II controller. During the initial operation of the X-Y stages unacceptable levels of vibration when the stages were in motion, and an intermittent sharp squealing when they were at rest, were discovered. In this paper we present the studies that were undertaken to investigate these issues and the solutions that were implemented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE33  
About • paper received ※ 09 September 2016       paper accepted ※ 23 September 2016       issue date ※ 22 June 2017  
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TUPE41 Design and Development of a System of Hybrid Type to Measure the Magnetic Field of a Cryogenic Undulator ion, vacuum, undulator, cryogenics 251
 
  • C.H. Chang, S.D. Chen, J.C. Huang, C.-S. Hwang, C.K. Yang
    NSRRC, Hsinchu, Taiwan
  
  Cryogenic permanent-magnet undulators (CU) have currently become the most important scheme serving as sources of hard X-rays in medium-energy facilities worldwide. One such set (length 2 m, period length 15 mm) is under development for Taiwan Photon Source (TPS). To obtain a magnetic-field distribution of the cryogenic undulator after it is cooled to an operating target temperature below 80 K, a device of hybrid type combining a Hall probe and stretched-wire method has been designed and developed, to perform the field measurement at low temperature and in an ultra-high vacuum environment. The Hall probe is used to measure the field on axis in the transverse and vertical directions; the stretched wire is utilized to measure the field integral in the vertical and horizontal directions in the horizontal plane. Unlike a conventional field-measurement system in air, this innovative system must be located in an ultra-high vacuum environment with limited clearance. This paper describes mainly the entire system, including kernel components, control systems and preliminary test results in detail.  
poster icon Poster TUPE41 [1.374 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE41  
About • paper received ※ 08 September 2016       paper accepted ※ 15 September 2016       issue date ※ 22 June 2017  
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WECA03 Experience With the Commissioning of the U15-Undulator for SwissFEL-Aramis Beamline and New Developments for the Athos Beamline ion, undulator, vacuum, FEL 283
 
  • P. Boehler, M. Brügger, M. Calvi, H. Jöhri, A. Keller, M. Locher, T. Schmidt, L. Schulz
    PSI, Villigen PSI, Switzerland
  
  The development of the U15 undulator was presented at the MEDSI Conference 2012 in Shanghai. Meanwhile the undulator line is finished. The presentation will explain the experience with the production, the assembling and the commissioning of the undulators. We succeeded to implement a robotic system, that did the final adjustment of all the magnets automatically. Therefore, we were able to reduce the time for the adjustment of the magnets dramatically. A whole loop with measuring, adjustment of the columns and final adjustment with the robotic system for the magnets takes 3 days. The presentation will explain these steps. For the next beam-line, 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 vacuum-pipe with only 0.2mm of wall thickness.  
slides icon Slides WECA03 [11.263 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WECA03  
About • paper received ※ 09 September 2016       paper accepted ※ 16 September 2016       issue date ※ 22 June 2017  
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WECA04 Horizontal-Gap Vertically-Polarizing Undulator (HGVPU) Design Challenges and Resolutions ion, undulator, vacuum, alignment 288
 
  • O.A. Schmidt, E. Gluskin, D.P. Jensen Jr., G. Pile, N.O. Strelnikov, K.J. Suthar, E. Trakhtenberg, I. Vasserman, J.Z. Xu
    ANL, Argonne, Illinois, USA
  
  The Horizontal-Gap Vertically-Polarizing Undulator (HGVPU) is a compact, innovative, variable-gap insertion device developed by Argonne National Laboratory for the LCLS-II HXR beamline at SLAC. A full sized 3.4-meter-long prototype has been built and fully tested meeting all LCLS-II undulator specifications. An array of conical springs compensates the attractive magnetic forces of the undulator jaws. These springs are designed to exhibit non-linear spring characteristics that can be closely tuned to match the force curve exerted by the magnetic field, thereby minimizing the overall deflection of the strongbacks. The HGVPU also utilizes the existing LCLS-I support and motion system along with other existing equipment and infrastructure, thus lowering overall cost and installation downtime.  
slides icon Slides WECA04 [12.616 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WECA04  
About • paper received ※ 10 September 2016       paper accepted ※ 03 October 2016       issue date ※ 22 June 2017  
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WECA07 Engineering Challenges of the VMXi Beamline ion, detector, feedback, MMI 304
 
  • J.H. Kelly
    DLS, Oxfordshire, United Kingdom
  
  The in-situ versatile macromolecular X-tallography (VMXi) beamline delivers a high flux density, taking data directly from crystallisation experiments within the plate, using a fully automated endstation. A double multilayer monochromator (DMM) was designed in-house to deliver a 60 fold increase in flux. Two robots and an automated load-lock pass the plates from the crystallisation storage units to the goniometer. A compact endstation was designed to accept the high flux and take data with acquisition times down to a millisecond. This paper gives an overview of the beamline layout and the interesting pieces of engineering design. The beamline is planned to take first user at the end of 2016.  
slides icon Slides WECA07 [5.292 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WECA07  
About • paper received ※ 08 September 2016       paper accepted ※ 23 September 2016       issue date ※ 22 June 2017  
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WEPE15 High Frequency UHV Mechanical X-Ray Beam Chopper ion, vacuum, experiment, electron 339
 
  • N González, C. Colldelram, C. Escudero, S. Ferrer
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  A mechanical chopper* has been designed and built to perform X-ray Absorption Spectroscopy (XAS) experiments with operating liquid electrochemical cells at NAPP end station of ALBA Synchrotron (BL24, CIRCE). When operating the cell, to separate the weak currents induced by the X-ray absorption process at the electrode in contact with the electrolyte (TEY signal) from the faradaic current set between the electrodes, the incoming beam must be chopped at a certain frequency (w). Then, using a lock in amplifier, the signal at this frequency w can be extracted and measured. When the chopper is located in the beam path, it produces pulses with a frequency w, modulating the TEY signal. The chopper developed at ALBA, with variable frequency, improves previous designs which used piezo-actuated choppers constrained to work at fixed oscillating frequencies**. The design consists of a slotted disk that spins around an axis by means of an UHV stepper motor. A LED and photodiode based UHV sensor ensures that frequency drifts do not affect the measurements. The motor is hold by an internally water cooled OFHC support, which allows long duration experiments at high speeds without stopping.
* Patent Registered
** Velasco-Velez et al, Science 2014, 346, 831-834 		 
poster icon Poster WEPE15 [4.043 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE15  
About • paper received ※ 09 September 2016       paper accepted ※ 16 September 2016       issue date ※ 22 June 2017  
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WEPE24 Live Animal Imaging Program at Bio-Medical Imaging and Therapy Facility at the Canadian Light Source ion, experiment, synchrotron, radiation 348
 
  • M.A. Webb, G. Belev, C.D. Miller, T.W. Wysokinski, N. Zhu
    CLS, Saskatoon, Saskatchewan, Canada
  • M. Gibbons
    University of Saskatchewan, Saskatoon, Canada
  
  The live animal imaging program at the Bio-Medical Imaging and Therapy (BMIT) facility at the Canadian Light Source has been developing for the last 5 years and continues to grow. It is expected to become a large portion of the user activity as numerous groups work towards the goal of live animal studies. Synchrotron-based imaging of live animals is an opportunity for great science that also brings challenges and specific requirements for the experimental end-station. The beamline currently provides basic support and has been improving the facilities available. For example, there have been changes to the lab to allow for longer rodent housing and improved housing during measurements. Remote control of heat lamps and of flow rate for gas anaesthesia allow a veterinarian or animal care worker to make adjustments without interrupting the imaging. Integration of user equipment such as heart/breathing monitoring and ultrasound equipment with the beamline systems can be used for gating control of imaging. Future improvements will be done with consultation with university veterinarians and the user groups.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE24  
About • paper received ※ 10 September 2016       paper accepted ※ 21 September 2016       issue date ※ 22 June 2017  
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THBA01 An Endstation with Cryogenic Coils Contributing to a 0.5 Tesla Field and 30-400k Sample Thermal Control ion, hardware, vacuum, scattering 396
 
  • G.A. Scharfstein, D. Arbelaez, J.-Y. Jung
    LBNL, Berkeley, California, USA
  
  The Engineering Division of Lawrence Berkeley National Laboratory presents a design for an End Station to enable X-ray Photon Correlation Spectroscopy (XPCS), which is a method to study temperature-induced fluctuation in hard and soft condensed matter systems. XPCS, when applied to a magnetic system, can yield information about how domains fluctuate as the system goes through a phase transition; these phase transitions can occur at low temperatures (< 100K) and at an applied magnetic field. Therefore, requirements for the End Station include a 0.5 Tesla field at the sample and temperature control of the sample from 30K to 400K.  
slides icon Slides THBA01 [10.200 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-THBA01  
About • paper received ※ 13 September 2016       paper accepted ※ 23 September 2016       issue date ※ 22 June 2017  
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FRBA01 A New Crystal Bender for the ID31 Laue-Laue Monochromator ion, SRF, cryogenics, vacuum 409
 
  • M. Magnin-Mattenet, P. Got, V. Honkimaki, A. Vivo
    ESRF, Grenoble, France
  
  The ID31 beamline is able to provide X-Ray energies ranging from 20 to 150keV. The energy range 50-150keVis covered by a Laue-Laue monochromator located at 100meters from the source. Two asymmetrically cut Si crystals equipped with benders, based on a new concept, provide an energy resolution ranging from few hundreds of eV down to the Darwin width of few eV. The bender principle, design, manufacture and first commissioning will be described. The virtual source, produced with a white beam transfocator, can be before or after the monochromator. Therefore the bending mechanism must allow both concave and convex configuration with bending radius from 20m to infinite. Each bender is equipped with two home made piezo-jacks in close loop with capacitive sensor. The system is liquid Nitrogen cooled. The thermal behaviour will be described in detail and thermo-mechanical finite element analysis presented.  
slides icon Slides FRBA01 [11.565 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-FRBA01  
About • paper received ※ 09 September 2016       paper accepted ※ 21 September 2016       issue date ※ 22 June 2017  
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FRBA02 The Nanobender: A New X-Ray Mirror Bender With Nanometer Figure Correction ion, optics, focusing, vacuum 413
 
  • C. Colldelram, J. Nicolás, P. Pedreira, L. Ribó, C. Ruget, I. Sics
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  • J.M. Casalta Escuer, C. Martín-Nuño Gonzalez, A. Tomas Justribo, D. Úbeda Gonzalez
    SENER, Cerdanyola del Vallès, Spain
  
  Over time X-Ray mirrors are demanded for better focusing, closer to sample refocusing, spot size as well as better beam uniformity at sample position. Based on the experience of ALBA Phase I beam lines a new alter-native design of a mirror bender* is proposed. The system includes two main functionalities: the mirror bender mechanism and mirror figure error correc-tion. Both mechanisms are based on the introduction of a force constrain on the mirror surface instead of a geometrical one. As being based on a force mechanism they could reach high resolution and especially for the correctors which can achieve nanometre resolution. The correctors are designed to provide high force stability in the mirror side, eliminating the crosstalk between bending and figure correction, and minimizing the sensitivity to drifts. With such controlled deformation of the mirror substrate it is possible to obtain the desired surface figure not only to correct mirror figure errors but also to adapt it to the incident wavefront, thus becoming adaptive system. The mechanical solutions are presented which are able to correct mirror surfaces with a resolution of 1 nm reaching slope errors below 100 nrad.
* Patent Registered 		 
slides icon Slides FRBA02 [4.766 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-FRBA02  
About • paper received ※ 03 October 2016       paper accepted ※ 08 May 2017       issue date ※ 22 June 2017  
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