Keyword: vacuum
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MOPE09 Preliminary Design and Test of Damping Mechanism for Reducing Vibration of TPS SR Vacuum Chamber ion, damping, site, experiment 20
 
  • K.H. Hsu, M.L. Chen, C.M. Cheng, H.C. Ho, D.-G. Huang, C.K. Kuan, W.Y. Lai, C.J. Lin, S.Y. Perng, T.C. Tseng, H.S. Wang
    NSRRC, Hsinchu, Taiwan
  
  Since flow-induced vibration of vacuum chamber effects of the stability of the electron beam storage ring in Taiwan Photon Source (TPS), a damping mechanism was designed and installed to reduce vibration. The damping mechanism is composed of a clamper of vacuum chamber, a fixed fixture on the girder and a sandwiched stain-less steel support with damping materials inside. Different kinds of materials were applied in the damping mechanism for vacuum chamber. The vibration of vacuum chamber were obtained and compared. The design and vibration measurement results of damping mechanism for vacuum chamber are presented in this paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE09  
About • paper received ※ 11 September 2016       paper accepted ※ 14 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, controls, 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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MOPE16 Development of the RIXS Manipulator ion, scattering, operation 35
 
  • H. Jöhri, C. Hess, L. Nue, L. Patthey, T. Schmitt
    PSI, Villigen PSI, Switzerland
  
  The RIXS Manipulator (RIXS = Resonant Inelastic X-ray Scattering) is a further development of the Carving Manipulator. The carving manipulator has six independent degree of freedom. (Three translations and three rotations). All three rotations are exactly in the middle of the sample surface. The head of the manipulator is in UHV and the sample can be cooled down to 10K. For the RIXS manipulator there is a new requirement to have a field of view from 0-180°. There are mainly two parts in the carving manipulator that set the probe in the shadow of the beam at small angles. - A bellow - The bearings To solve these problems we shifted the bellow behind the pivot point. This give some strange movements of the bellows and we had to analyse this in a separate test installation. For the bearings, we developed a goniometer bearing with ceramic bearing shells. Meanwhile the RIXS manipulator is implemented and in routine operation  
poster icon Poster MOPE16 [1.357 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE16  
About • paper received ※ 09 September 2016       paper accepted ※ 14 September 2016       issue date ※ 22 June 2017  
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MOPE26 Front End Photon Shutter Water Leak to Vacuum at the Canadian Light Source ion, photon, operation, cavity 60
 
  • G.R. Henneberg, M.J.P. Adam, G.R. Barkway
    CLS, Saskatoon, Saskatchewan, Canada
  
  In early July 2016 CLS experienced a water to vacuum leak in the storage ring. The source of the leak was a pin hole in the absorbing surface of Photon Shutter 1 in the front end of the HXMA Beamline. The leak was caused by high velocity cooling water erosion of the internal cooling water path of the copper photon shutter block. The poster will present the root cause analysis of the leak, implications for other identical photon shutters and currently in service and the current remedial action plan.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE26  
About • paper received ※ 11 September 2016       paper accepted ※ 23 September 2016       issue date ※ 22 June 2017  
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MOPE27 The Influences of Material Properties to Micro Damages on Vacuum Chamber CF Flanges ion, FEL, simulation, diagnostics 63
 
  • S. Vilcins, M. Holz, M. Lemke, D. Nölle, Ch. Wiebers
    DESY, Hamburg, Germany
  
  The European-XFEL, a 3.3 km long X-Ray laser facility, powered by a 17.5 GeV superconducting linear accelerator, is located at DESY in Hamburg [1]. For the diagnostics ultra-high vacuum components with high mechanical precision and strict requirements on particle cleanliness had to be developed, designed and produced. For the screen system of the facility, enabling to observe the size and shape of the electron beam, massive vessels, precisely milled out of stainless steel blocks 1.4435 (316L) have been produced. For these chambers all flange-connections are milled into these blocks. This paper will report onμdamages in these integrated knife edges and will present simulations of the damage mechanisms. It will also describe the influences of material properties of two different stainless steel brands, effects on the ¿knife edge¿ due to the penetration into the gaskets as well as the non-elastic deformation of the sealing area. The dependence of tightening forces under special conditions, like the very clean conditions in particle free applications due to the non-lubricated conditions will be reported. A ¿cooking recipe¿ to avoid suchμdamages will be given.  
poster icon Poster MOPE27 [0.187 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE27  
About • paper received ※ 09 September 2016       paper accepted ※ 23 September 2016       issue date ※ 22 June 2017  
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MOPE28 Vacuum System of SESAME Storage Ring ion, storage-ring, simulation, injection 71
 
  • M.A. Al-Najdawi, H. Al-Mohammad, E. Huttel, F. Makahleh, M.M. Shehab
    SESAME, Allan, Jordan
  
  Funding: N/A
SESAME* is a third-generation synchrotron light source under construction near Amman (Jordan). The storage ring has 16 Dipole arc chambers, 8 short and 8 long straight chambers. The general layout and detailed design of the vacuum chambers, crotch absorbers, RF bellows, injection and RF sections will be presented in this contribution, also the testing of the chambers prototype, bake out process and final installation.
* Synchrotron-light for Experimental Science and Applications in the Middle East 		 
poster icon Poster MOPE28 [2.696 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE28  
About • paper received ※ 10 September 2016       paper accepted ※ 14 September 2016       issue date ※ 22 June 2017  
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MOPE29 Vacuum System of HLS-II Storage Ring ion, storage-ring, synchrotron, MMI 74
 
  • Y. Wang, L. Fan, Y.Z. Hong, X.T. Pei, W. Wei, B. Zhang
    USTC/NSRL, Hefei, Anhui, People’s Republic of China
  
  Hefei Light Source (HLS) has been operated for more than twenty-five years. From 2010 to 2014, the upgrading project of HLS has been carried out and the new machine is called HLS-II. The main improvement include: the emittance is reduced to 40 nm·rad, 3 new insertion devices (2 IVU and 1 EPU undulators) are added and the injection energy increases to 800 MeV. The typical life time is 300 mins at 300mA, 800 MeV. The average pressure of static and dynamic vacuum are below 2·108 Pa and 1.2·10-7 Pa respectively. The design, installing and commissioning of the vacuum system of the storage ring are detailed stated in in this paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE29  
About • paper received ※ 09 September 2016       paper accepted ※ 23 September 2016       issue date ※ 22 June 2017  
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MOPE30 The Development of CuCrZr High Heat Load Absorber in TPS ion, synchrotron, radiation, synchrotron-radiation 77
 
  • I.C. Sheng, C.K. Chan, C.-C. Chang, C. Shueh, L.H. Wu
    NSRRC, Hsinchu, Taiwan
  • S.K. Sharma
    BNL, Upton, Long Island, New York, USA
  
  TPS project in National Synchrotron Radiation Research Center (NSRRC) in Taiwan has reached 500mA design goal. Several upgrades and design enhancements is also under development. CuCrZr copper alloy material has been selected to examine its UHV compatibility, machinability and high heat load sustainability. Most importantly, the absorber is made entirely by CuCrZr (including two end flanges) and installed in the mid-section of double minimum of tandem EPU48 undulators to shadow beam miss-steered synchrotron radiation from upstream EPU. Both the result and fabrication time (without brazing) are promising.  
poster icon Poster MOPE30 [0.547 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE30  
About • paper received ※ 06 September 2016       paper accepted ※ 19 September 2016       issue date ※ 22 June 2017  
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MOPE37 Diamond Multi-Bend Achromats for Low Emittance and New Insertion Devices ion, alignment, emittance, storage-ring 90
 
  • J. Kay, N.P. Hammond
    DLS, Oxfordshire, United Kingdom
  
  Diamond Light Source is pioneering the move to a Multi Bend Achromat storage ring lattice for low emittance combined with the creation of new straight sections available for Insertion Devices (ID). Diamond is at an advanced stage of replacing one Double Bend Achromat (DBA) cell of the existing storage ring with a Double Double Bend Achromat (DDBA). The DDBA cell which is to be installed in Autumn 2016 has 4 dipoles and has been designed with a new straight section in the middle. This allows a new ID source point to be installed on an existing Bending Magnet port in the shield wall for a new micro-focus protein crystallography beamline called VMX-m. This same principle will be applied to the proposed Diamond II project which will be based on a Double Triple Bend Achromat with 6 dipoles per cell achieving even lower emittance whilst providing many more IDs. This paper describes the engineering challenges of these projects.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE37  
About • paper received ※ 09 September 2016       paper accepted ※ 15 September 2016       issue date ※ 22 June 2017  
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MOPE40 Designing the Flash II Photon Diagnostic Beamline and Components ion, diagnostics, experiment, photon 96
 
  • D. Meissner, M. Brachmanski, M. Hesse, U. Jastrow, M. Kuhlmann, H. Mahn, F. Marutzky, E. Plönjes-Palm, M. Röhling, H. Schulte-Schrepping, K.I. Tiedtke, R. Treusch
    DESY, Hamburg, Germany
  
  From 2013 to 2016 the free electron laser FLASH at DESY in Hamburg, Germany was upgraded with a second undulator line, photon diagnostic line, beam distribution and experimental hall connected to the same linear accelerator. This paper shows the layout of the photon diagnostic section and an overview of the civil engineering challenges. The mechanical design of selected components, e.g. vacuum components, diagnostic equipment and safety related components is presented.  
poster icon Poster MOPE40 [1.081 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE40  
About • paper received ※ 08 September 2016       paper accepted ※ 21 September 2016       issue date ※ 22 June 2017  
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MOPE41 Design and Construction of a PW Experimental System of HV Chamber Adaptable, Modular and Stable ion, laser, experiment, resonance 99
 
  • A. Carballedo, C. Colldelram, J.R. García, R. Monge, L. Nikitina
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  • J. Hernandez-Toro, L. Roso
    CLPU, Villamayor, Spain
  
  Funding: This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement no 654148 Laserlab-Europe
In the recent years, the number of high power lasers devoted to particle acceleration has increased in Europe. Additionally to this, some synchrotrons and accelerators are integrating these lasers in its lines, increasing the scientific synergies. The HP laser must be transported in HV. The use of HV also permits good cleanliness in the optical set up. As addition, is necessary to create an adaptable and modular design where several chambers could be assembled together. One additional constrain is the stability. A new model of HV chambers is presented. These consist in a frame where the walls are exchangeable panels, which make easier the introduction of a new configuration of ports. The system was designed as construction blocks. For a proper connection of the chambers a new interior fixation and pushers system was designed. Thanks to this, coupling new HV chambers, the volume total can be also easily modified. Finally, a third generation decoupled system is integrated inside, consisting of a stable breadboard, this supported by six columns that implement a preloaded kinematical mount, providing both an outstanding stability and a fine regulation (1st RM: 77Hz). 		 
poster icon Poster MOPE41 [0.938 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE41  
About • paper received ※ 09 September 2016       paper accepted ※ 20 September 2016       issue date ※ 22 June 2017  
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TUPE04 Coherent Soft X-Ray EPU Vacuum Chamber Thermal Analysis for Synchrotron Radiation Protection ion, synchrotron-radiation, synchrotron, radiation 159
 
  • H.C. Fernandes, P.L. Cappadoro, D.A. Harder, D.A. Hidas, C.A. Kitégi, M. Musardo, J. Rank, T. Tanabe
    BNL, Upton, Long Island, New York, USA
  
  Funding: Department of Energy
The purpose of this study was to determine the effect of beam mis-steering, on the temperature of the vacuum chamber. The chamber used for this study was for the Coherent Soft X-Ray (CSX) Elliptically Polarizing Undulator (EPU). Finite Element Analysis was conducted on the vacuum chamber to determine the temperature distribution on the chamber for set values of beam mis-steer, for NSLS-II. These results were then compared with on-site temperature measurements taken using RTD¿s, as well as thermal sensitive cameras. The accuracy of these results was analyzed and further FEA studies were proposed for steeper beam mis-steers and beam offsets. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE04  
About • paper received ※ 09 September 2016       paper accepted ※ 20 September 2016       issue date ※ 22 June 2017  
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TUPE09 Thermo-Fluid Study of the UPC Race-Track Microtron Cooling System ion, linac, microtron, simulation 173
 
  • X. Escaler, V. Blasco, Yu.A. Kubyshin, J.A. Romero, A. Sanchez
    UPC, Barcelona, Spain
  • M. Prieto
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  • V.I. Shvedunov
    SINP MSU, Moscow, Russia
  
  The cooling system of the race-track microtron (RTM), which is under construction at the Universitat Politècnica de Catalunya (UPC), has been simulated by means of a computational fluid dynamics (CFD) software. The hydraulic and thermal performance of the system has been studied for various operation conditions. Firstly, the hydraulic model has been validated by comparison with experimental measurements at different flow rates. Then, the cooling fluid temperatures and the pressure losses of the system have been determined and the capacity of the current design to remove the generated heat at nominal power has been confirmed. Finally, the wall maximum and average temperatures and heat transfer coefficients inside the magnets and the accelerating structure have been calculated. These results have allowed us to localize sections of the cooling system with a low convection due to detached flows where, therefore, a risk of zones of high temperatures exists. An optimization of the cooling circuit with the aim to reduce such high temperature zones has been proposed.  
poster icon Poster TUPE09 [0.552 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE09  
About • paper received ※ 02 September 2016       paper accepted ※ 21 September 2016       issue date ※ 22 June 2017  
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TUPE14 Study, Design and Optimization Analysis of the ALBA LOREA Dipole Vacuum Chamber and Crotch Absorbers Based on Finite Element Analysis ion, dipole, radiation, simulation 191
 
  • M. Quispe, J. Campmany, J.J. Casas, C. Colldelram, A. Crisol, J. Marcos, G. Peña, M. Tallarida
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  This work deals with the FEA study, design and optimization of the LOREA dipole vacuum chamber and Glidcop Al-15 crotch absorbers. At present LOREA is the ninth beam-line being designed at ALBA with an Insertion Device (ID) consisting of an Apple II-type helical undulator. For the standard dipole chamber the vertical polarized light hits the walls because of the very narrow vertical aperture between the cooling channels. In vertical mode the ID vertical divergence equals ± 2.2 mrad and the peak power density and total power are 5.6 kW/mrad² and 5.5 kW, respectively. Due to the high power a temperature as high as more than 600 °C is calculated. In consequence the dipole chamber has to be modified and the absorbers have to withstand the Bending Magnet (BM) and ID radiation. The new absorbers have to be thicker and its cooling channels are farer from BM power deposition than the standard absorbers. The thermal mechanical simulations show good results, the new absorbers are in a safe range, the maximum temperature, stress and strain are 309.2 °C, 164.2 MPa and 0.14%, respectively. The main ALBA Storage Ring design parameters used in the simulations are: 3 GeV, 400 mA and 1.42 T (BM).  
poster icon Poster TUPE14 [1.524 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE14  
About • paper received ※ 09 September 2016       paper accepted ※ 15 September 2016       issue date ※ 22 June 2017  
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TUPE18 Design and FEA of a 3D Printed Detector Window Frame ion, detector, scattering, experiment 201
 
  • W. Tizzano
    DLS, Oxfordshire, United Kingdom
  
  The purpose of the project was to design and simulate a window assembly to be used in GISAX/GIWAX experiments. The window lies between the sample and the WAXS** detector, a modified, in-vacuum detector, with modules removed to allow scattered radiation to pass through to a SAXS*** detector positioned downstream. The window uses 75um thick Kapton HN film and given the size, pressure and the short distance to the sensors, it was necessary to support it on a frame. To avoid any information loss from shadowing of the detector, a frame was designed so that shadows will be projected into the gaps between the detector modules. The geometry was such that DMLS**** was an effective way of producing the item. Given the slenderness of the structure and the forces it supports, the material approaches or exceeds its yield point, so a bilinear, isotropic, hardening material model was chosen; moreover, large deflections were enabled. Also, the contacts were modelled with augmented Lagrange frictional formulation. All these assumptions made the analysis strongly non-linear.
*Grazing Incidence Small/Wide Angle X-ray scattering
**Wide Angle X-ray Scattering
***Small Angle X-ray Scattering
****Digital Metal Laser Sintering 		 
poster icon Poster TUPE18 [7.079 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE18  
About • paper received ※ 09 September 2016       paper accepted ※ 23 September 2016       issue date ※ 22 June 2017  
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TUPE19 Application of a NEG Coated Chamber at the Canadian Light Source ion, storage-ring, undulator, survey 205
 
  • S.Y. Chen, D. Bertwistle, K. Kei, C. Murray, T.M. Pedersen
    CLS, Saskatoon, Saskatchewan, Canada
  
  In the Fall of 2015 a 4800 mm long NEG coated chamber was installed in the Canadian Light Source in cell 9 straight section. The chamber will occupy to majority of the straight length. The chambers vacuum has been monitored for +1 year and no obvious issues has been found. The chamber body is 10 mm thick and the aperture is an ellipse with a 8 mm height and a 65 mm width. A design feature of the chamber is a lack of support in-between the ends of the chamber. The lack of support space is due to the double elliptically polarizing undulator (54 mm, and 180 mm period). This proceeding details the following: a.The structure design and Finite Element Analysis for the deflection and strength; b.Heat loads and cooling calculation; c.Supports design; d.Deflection and correction with the supports; e.Current strips installation f.Activation;  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE19  
About • paper received ※ 15 September 2016       paper accepted ※ 23 September 2016       issue date ※ 22 June 2017  
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TUPE21 CLSI BMIT’s Super-Conducting Wiggler Cryogenic Safety Improvements* ion, wiggler, cryogenics, operation 209
 
  • L.X. Lin, T.W. Wysokinski
    CLS, Saskatoon, Saskatchewan, Canada
  
  4.1 T superconducting (SC) wiggler on CLS Biomedical Imaging and Therapy (BMIT) beamline [1-4] developed a critical problem in the cryogenic safety relief and refill paths. Ice blockage formed and prevented helium gas from relieving during liquid helium (LHe) refill. This resulted in an internal pressure built up, which caused expelling of the LHe and cold gas helium (GHe) from the wiggler cryostat. Several improvements were performed over the years including replacement of the original rupture disk, the pressure relief valves and installation of metal O-ring seals at external ports. Following these improvements, a major upgrade on the wiggler safety relief path was implemented by adding a new vent pipe directly connected to the cryostat for safety exhaust. The LHe refill path was also modified to eliminate possibility of ice blockage. During initial tests after the up-grades, we experienced significant heat load increase which was linked to the thermal acoustic oscillations in the LHe transfer line. The problem was resolved by improving the insulation vacuum in the transfer line and adding a super insulation assembly into the direct vent pipe along with a plug at the refill path.
*Work supported by Budker Institute of Nuclear Physics under contract No. C60109-029
¿ Linda. Lin@lightsource.ca
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE21  
About • paper received ※ 08 September 2016       paper accepted ※ 22 September 2016       issue date ※ 22 June 2017  
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TUPE23 Glidcop Brazing in Sirius’ High Heat Load Front-End Components ion, synchrotron, operation, photon 216
 
  • G.V. Claudiano, O.R. Bagnato, P.T. Fonseca, F.R. Francisco, R.L. Parise, L.M. Volpe
    LNLS, Campinas, Brazil
  
  Sirius is a 4th generation synchrotron light source in project. Some of Sirius’ beamlines will have a very high power density, more than 50 kW/mrad², to be dissipated in components that have a limited space condition. Thus, the refrigeration of these components is complex when one has in mind that the coolant flow cannot be too turbulent in order to not induce much vibration in the components. Oxygen Free Electrolytic Cu (OFEC) has been replaced by the Glidcop, on 4th generation synchrotron applications, due to its good thermal conductivity and preservation of mechanical properties after heating cycles. However, as this material is not very workable in terms of union with other materials, which led to the development of a brazing process for Glidcop and stainless steel union. Glidcop samples were submitted to a Cu-electroplating process and a silver base alloy (BVAg-8) was used to join the parts in a high vacuum furnace. Electroplating was used to improve the filler metal wettability. The results were very satisfactory, ensuring water and vacuum tightness. A desirable characteristic not yet proved is the virtual leak property. This paper will discourse about this brazing method.  
poster icon Poster TUPE23 [1.553 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE23  
About • paper received ※ 09 September 2016       paper accepted ※ 22 September 2016       issue date ※ 22 June 2017  
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TUPE25 Metallurgical Evaluation of Dissimilar Metal Joints for Accelerator Vacuum Chamber Construction at the Advanced Photon Source Upgrade Project ion, ECR, interface, laser 220
 
  • G. Navrotski, B. Brajuskovic
    ANL, Argonne, Illinois, USA
  
  Funding: Funding provided by the Advanced Photon Source, U.S. Department of Energy, Office of Science, Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
Tubular vacuum chamber assemblies made of aluminum, copper and stainless steel alloys will be used in the new Multi Bend Achromat (MBA) storage ring that is being developed at Advanced Photon Source (APS). Details of the new lattice magnet system design and ring impedance considerations continue to drive these vacuum chambers to smaller dimensions and thinner walls with tighter geometric tolerances under higher thermal loads. It is important to carefully evaluate the methods used to join these dissimilar metal components looking for compromise in primary strength, permeability, electrical and thermal properties while still creating structures that are ultra-high vacuum compatible and leak-tight. This paper visually details the underlying metallurgical changes that occur when joining various combinations of aluminum, OFE copper, GlidCop® and stainless steel using brazing, bonding and welding techniques. Each of the techniques has its advantages and disadvantages with engineering and economic consequences. 		 
poster icon Poster TUPE25 [2.312 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE25  
About • paper received ※ 07 September 2016       paper accepted ※ 15 September 2016       issue date ※ 22 June 2017  
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TUPE29 Integration of a Stripline Kicker Prototype for CLIC Project Into ALBA Storage Ring ion, kicker, synchrotron, distributed 230
 
  • R. Monge, J.C. Giraldo, J. Ladrera Fernández, M.L. Llonch, L. Nikitina, M. Pont, M. Quispe
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  The Compact Linear Collider (CLIC) project is an international collaboration with CERN for developing a high-energy and high-luminosity machine which accelerates and collides electrons and positrons at energies up to several tera-electron volts. The extraction system for the Damping Rings of the CLIC shall follow very tight requirements in order to maintain the ultra-low emittance of the extracted bunches. A first prototype of the extraction kicker based on stripline technologies has been built and characterized at CERN without beam. The stripline chamber will be shortly installed in the ALBA Synchrotron to be tested under beam. In situ measurements of the impedance, transversal field homogeneity and flat-top ripple aims to complete its characterization. This contribution presents the design of the set up for the integration of the stripline chamber in one of the medium straight sections of ALBA storage ring.  
poster icon Poster TUPE29 [4.469 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE29  
About • paper received ※ 09 September 2016       paper accepted ※ 15 September 2016       issue date ※ 22 June 2017  
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TUPE31 Manufacturing of Photon Beam-Intercepting Components from CuCrZr ion, photon, operation, synchrotron 233
 
  • F.A. DePaola, C. Amundsen, S.K. Sharma
    BNL, Upton, Long Island, New York, USA
  
  Photon beam-intercepting components in synchrotron light sources have usually been made as water-cooled Glidcop bodies brazed to stainless steel conflate flanges. This fabrication method involves many manufacturing steps which result in increased cost, long procurement time and lower manufacturing reliability. A new design approach was recently proposed which simplifies fabrication by eliminating brazing and utilizes a readily available copper alloy, CuCrZr. This paper describes the manufacturing experience gained at NSLS-II from fabricating many components of this new design. Results of an investigation of various techniques for joining CuCrZr to itself and to SS304 and AL-6061 are also presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE31  
About • paper received ※ 09 September 2016       paper accepted ※ 15 September 2016       issue date ※ 22 June 2017  
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TUPE32 A Girder-Free Magnet Support System Design ion, alignment, storage-ring, brightness 236
 
  • S.K. Sharma
    BNL, Upton, Long Island, New York, USA
  
  Magnet support systems for the new light sources are required to satisfy several rigorous performance specifications. The support system must be rigid so that its static deflection under its own weight and the combined weight of the magnets is small and repeatable. For vibration stability the lowest natural frequency of the magnet-support assembly should be greater than 50 Hz. To meet thermal stability requirements it is desirable to minimize bending deformation of the support system when subjected to temperature changes. In addition, the magnet support system should be easy to transport, easy to align, and cost effective. Altogether these requirements are difficult to satisfy, especially if the main structural component of the support system is a girder of length greater than 3 meters. In this paper we propose a magnet support system design consisting of column-type supports joined by removable C-beams. The column-type supports provide a superior stability performance without compromising the alignment capability. Analysis results are presented to characterize the performance of this support system.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE32  
About • paper received ※ 09 September 2016       paper accepted ※ 15 September 2016       issue date ※ 22 June 2017  
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TUPE33 NSLS-II Beam Aperture Slit Vibration Studies ion, controls, 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, undulator, cryogenics, controls 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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WEAA02 X-Ray Absorber Design and Calculations for the EBS Storage Ring ion, SRF, storage-ring, scattering 257
 
  • F. Thomas, J.C. Biasci, D. Coulon, Y. Dabin, T. Ducoing, F. Ewald, E. Gagliardini, P. Marion
    ESRF, Grenoble, France
  • F. Thomas
    ILL, Grenoble, France
  
  The Extremely Brilliant Source (EBS) of the ESRF will hold new type of X-Ray absorbers: a new material will be used (CuCr1Zr suggested by *) together with a novel design integrating: - CF flange are machined in the absorber body. No weld, no braze. - Optimized toothed surface profile, reducing the induced thermal stresses. - Compton and Rayleigh scattering integrated blocking shapes. - Concentric cooling channels. A brief overview of the new design and concepts will be given. The presentation will then focus on thermo-mechanical absorber ANSYS calculations, combining both Computational Fluid Mechanics (CFD). The calculations and the calculation process will be discussed as well as the design criteria chosen by the team. The CFD calculations will show that an heat transfer coefficient between the water and the copper part can be estimated as well as the pressure drop through the absorber. Finally, the stress analysis will be emphasized. The type of stresses (tensile, compressive or shear) and their nature (primary or secondary) will be linked to the choice of design criteria.
* S. Sharma, "A Novel Design of High Power Masks and Slits", Proc. of MEDSI2014, Australia (2014). 		 
slides icon Slides WEAA02 [1.968 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEAA02  
About • paper received ※ 11 September 2016       paper accepted ※ 16 September 2016       issue date ※ 22 June 2017  
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WEAA04 Novel Numerical Method for Calculating the Shadow Projection and Collisions of a Multi-Axis Goniometer at Diamond ion, detector, factory, alignment 267
 
  • V. Grama, A. Wagner
    DLS, Oxfordshire, United Kingdom
  
  Beamline I23 is a long-wavelength macromolecular crystallography beamline at Diamond Light Source. The end station is a unique instrument with a bespoke cryogenically cooled multi-axis goniometer and a large curved Pilatus 12M detector in a high vacuum environment. As experiments become limited by radiation damage to the crystals, optimised strategies are needed to orient crystals in the most efficient way to obtain a complete dataset with a minimal X-ray dose. Two key factors affect the optimisation strategies. Firstly, shadowing on the detector by the goniometer resulting in data loss in this region and secondly, collisions between the goniometer and other components in the end station restricting the available angular range for sample centering and data collection. This paper discusses the numerical methods for calculating the shadowing of a multi-axis goniometer on a semi-cylindrical detector and the calculation of the allowable angles for various conditions to prevent collisions with neighbouring components.  
slides icon Slides WEAA04 [61.267 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEAA04  
About • paper received ※ 07 September 2016       paper accepted ※ 16 September 2016       issue date ※ 22 June 2017  
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WEBA03 Recent Progress on the Design of High-Heat-Load Components ion, photon, SRF, dipole 277
 
  • S.K. Sharma, C. Amundsen, F.A. DePaola, F.C. Lincoln, J.L. Tuozzolo
    BNL, Upton, Long Island, New York, USA
  
  A new design was recently proposed for the high power masks and slits of the front-ends at the 2014 MEDSI Conference. The main features of the new design are integrated knife edges in high conductivity copper alloys, interception of the photon beam only on horizontal surfaces, replacing Glidcop® with readily available CuCrZr, and thermal optimization with internal fins. Numerous components based on this design have been built for NSLS-II front-ends and some of the design features have been incorporated into other high-heat-load components such as beamline masks and crotch absorbers. In this paper we describe recent progress at NSLS-II in further advancing this design approach by FE analysis, fabrication and testing.  
slides icon Slides WEBA03 [4.523 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEBA03  
About • paper received ※ 09 September 2016       paper accepted ※ 16 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, FEL, controls 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, controls, 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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WEPE01 Combined Fixed Mask, Photon Shutter, Safety Shutter, and Collimator Design for BXDS IVU at the CLS ion, radiation, photon, operation 309
 
  • M.J.P. Adam, C. Bodnarchuk
    CLS, Saskatoon, Saskatchewan, Canada
  
  Funding: Canadian Foundation for Innovation
The first shutter assembly outside of the Front End (FE) for Brockhouse X-Ray Diffraction and Scattering Sector (BXDS) beamline required a unique design solution to accommodate all components into required safety shutter position. Located between the IVW high energy wiggler monochromator and POE1 wall, the total envelope size approximated 1m x 0.660m (LxW). Accommodating a smaller space required an alternative shutter design than traditionally used implemented at the CLS. The alternative proposed design combined the collimator (CLM), safety shutter (SSH), photon shutter (PSH) and Fixed Mask (FM) into one chamber. Finite Element Analysis (FEA) was conducted on the FM and PSH assembly to verify that geometric designs were adequate for reasonable operation in the beamline. FEA was used to determine the steady-state thermal and static-structural response in both operating positions. Missteer was analyzed for both operating positions to a maximum of 2.5mm (commonly accepted missteer used at the CLS) from center. Finally, two extreme position (5mm) analyses were completed for determination of potential, but unlikely operating conditions. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE01  
About • paper received ※ 11 September 2016       paper accepted ※ 21 September 2016       issue date ※ 22 June 2017  
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WEPE02 Performance Evaluation of Fast Closing Shutter System at the SPring-8 Front-end ion, experiment, storage-ring, ECR 312
 
  • S. Takahashi
    JASRI/SPring-8, Hyogo, Japan
  • M. Sano, A. Watanabe
    Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Hyogo, Japan
  
  The fast closing shutter (FCS) system plays an important role in protecting the ultra-high vacuum in the SPring-8 storage ring from a sudden vacuum accident in the beam-lines. In order to predict the transit time of the shock wave and the following pressure increase, a shock tube system with an inner diameter of 35 mm and a total length of 10 m was prepared to measure the shock Mach number. Experiments have been conducted that simulated an inrush of the atmosphere into the high-vacuum (~10-3 Pa) pipe by using a trigger system that combines of a thin cellophane diaphragm with a plunger. Special ionization gauges with a high-speed amplifier are distributed about every 1 m to detect the transit time of the shock wave and to measure the pressure in a low-pressure chamber after the actuation of the FCS system. By inserting vacuum components with various cross-sectional shapes including actual front-end components into the shock tube, the attenuation in the shock wave was systematically investigated.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE02  
About • paper received ※ 06 September 2016       paper accepted ※ 16 September 2016       issue date ※ 22 June 2017  
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WEPE04 Design of X-Ray Beam Position Monitor for High Heat Load Front Ends of the Advanced Photon Source Upgrade ion, detector, radiation, undulator 318
 
  • S.H. Lee, J. Mulvey, M. Ramanathan, B.X. Yang
    ANL, Argonne, Illinois, USA
  
  Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357
Accurate and stable x-ray beam position monitors (XBPMs) are key elements in obtaining the desired user beam stability in the Advanced Photon Source (APS). Currently, the APS is upgrading its facility to increase productivity and to provide far more highly coherent and brilliant hard x-rays to beamline experiments with a new storage ring magnet lattice based on a multi-bend achromat (MBA) lattice. To improve the beam stability, one of the proposed beam diagnostics is the grazing-incidence insertion device x-ray beam position monitor (GRID-XBPM) for high heat load (HHL) front ends (FEs) at the APS. In this paper, final design of the GRID-XBPM and the high-power beam test results at beamline 27-ID-FE will be addressed. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE04  
About • paper received ※ 07 September 2016       paper accepted ※ 21 September 2016       issue date ※ 22 June 2017  
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WEPE06 High Heat Load Front Ends for Sirius ion, photon, storage-ring, radiation 324
 
  • L.M. Volpe, H.F. Canova, P.T. Fonseca, P.P.S. Freitas, A. Gilmour, A.S. Rocha, G.L.M.P. Rodrigues, L. Sanfelici, M. Saveri Silva, H. Westfahl Jr., H.G.P. de Oliveira
    LNLS, Campinas, Brazil
  
  Funding: Brazilian Ministry of Science, Technology, Innovation and Communication (MCTIC)
Currently under construction on Brazilian Synchrotron Light Laboratory Campus, Campinas/SP, Sirius is a 3GeV, 4th Generation Synchrotron Light Source. In this paper we describe the Front End that has been designed to transmit the intense synchrotron radiation generated by the insertion devices that will generate the most critical thermal stress, with a peak power density of 55.7 kW/mrad² and a total power of 9.3kW at 500mA in the storage ring. The functions of the main components and their location in the layout are described. Computational fluid dynamics (CFD) and structural simulations, that have been carried out to verify the performance under the high heat loads generated by Sirius, are also detailed along with the limits of temperature and stress that have been employed in the design. 		 
poster icon Poster WEPE06 [1.415 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE06  
About • paper received ※ 11 September 2016       paper accepted ※ 19 September 2016       issue date ※ 22 June 2017  
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WEPE07 A High Heat Load Front-End for the Superconducting Wiggler Beamline at SSRF ion, SRF, photon, radiation 327
 
  • Y. Li, D. Jia, S. Xue, M. Zhang, W. Zhu
    SINAP, Shanghai, People’s Republic of China
  
  A superconducting wiggler (SCW) will be first employed to generate high energy X-rays for ultra-hard X-ray applications beamline at Shanghai synchrotron radiation facility (SSRF). The front-end will handle a heat load of 44.7 kW with a peak power density of 45 kW/mrad², which is much higher than the commissioned ones at SSRF. Overall design of the high heat load front-end has been completed, including one short absorber with a length of 300 mm and three long absorbers longer than 500 mm. Long absorbers have been designed to be made by medium speed wire-cut electrical discharge machining (WEDM-MS) or electron beam welding (EBW). Thermal analyses of all absorbers have also been done to comply with the failure criteria of SSRF.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE07  
About • paper received ※ 08 September 2016       paper accepted ※ 16 September 2016       issue date ※ 22 June 2017  
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WEPE09 Designing the Photon Beamline Frontends in the PETRAIII Extension Project ion, photon, wiggler, damping 330
 
  • H. Krüger, W.A. Caliebe, M. Degenhardt, M. Hesse, F. Marutzky, H.-B. Peters, R. Peters, M. Röhling, H. Schulte-Schrepping, B. Steffen
    DESY, Hamburg, Germany
  
  The new insertion device beamlines in the PETRAIII extension project are arranged in three new sector types. Following will present the designs of the photon beamlines frontends for these sectors. The designs are based on the original design concept developed for the photon beamline frontends at PETRAIII. The aim of this generic approach was to minimize the number of specialized components for all beamlines. The existing girder concept allows a fast and reliable installation phase. The newly designed frontends aimed at using the same proven components and minimizing of the number of girder variations. There will be 4 new sectors with two undulator IDs in each sector. The canting angle between the undulators has been increased from 5mrad to 20mrad in difference to the generic beamlines. Additionally, two of the straight sections are modified. One straight section will be transformed in a side station sector with a 1mrad canting angle. The other straight section with the 40m long damping wiggler will be used as a single beamline with a hard X-ray source. The modifications of the original frontend design, the components and the deviations between the sector types are being presented.  
poster icon Poster WEPE09 [4.799 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE09  
About • paper received ※ 09 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, experiment, electron, controls 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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WEPE22 F-Switch: Novel ’Random Access’ Manipulator for Large Numbers of Compound Refractive Lenses ion, operation, FEL, alignment 345
 
  • G.M.A. Duller, D.R. Hall, A. Stallwood
    DLS, Oxfordshire, United Kingdom
  
  The F-Switch is a new concept of device for the manipu-lation of large arrays of 2D CRLs or similar disc-shaped optical elements (12mm dia, 2mm thick) under high vac-uum. Unlike the well-known transfocator devices the optical elements are randomly selectable. This enables a number of potential modes of operation, including the fine adjustment of focal length by adjusting the effective lens centre position when using CRLs or the use of some positions within the array to implement filters or reference foils. Actuation and guidance is achieved within the thickness of the element, so that the overall length of the device is minimised. The device has been in user operation on the I04 MX beamline at Diamond Light Source (DLS) since 2015. Another device is being assembled for use on the I11 beamline at DLS. It is also hoped to install another device on the I03 beamline. We present details of the mechanical design of the F-Switch and some examples of its operation.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE22  
About • paper received ※ 10 September 2016       paper accepted ※ 21 September 2016       issue date ※ 22 June 2017  
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WEPE37 Upgrade of the Super Advanced X-Ray Spectrometer (SAXES) of the RIXS Endstation for Better Resolution and Larger Detector Size ion, GUI, detector, scattering 367
 
  • St. Maag, P. Hirschi, L. Nue, T. Schmitt, X. Wang
    PSI, Villigen PSI, Switzerland
  
  The RIXS endstation of ADRESS beamline at Swiss Light Source (SLS) is equipped with an ultrahigh resolution X-ray spectrometer. The spectrometer with a length of 5 m is installed on a rotating girder platform and allows varying scattering angles from 30° to 130°. The position of the CCD detector is longitudinally adjustable on the girder and vertically adjustable on a moving frame to allow an angle between 2° to 15° in the vertical plane. In the scope of a CCD camera upgrade, the modification of the vertical alignment of the guiding structure and ultra-high vacuum tanks became necessary. The new camera with a higher resolution and larger detector size weights around 25 kg. It is required to have a vibration amplitude well below 2 micrometer. We will present the critical design parameters of the upgrade, and the effort to increase bending stiffness of vacuum guide structure while keeping major geometry parameters. In addition, kinematic overdeterminacy was removed. After the upgrade we performed vibration measurements verifying that dynamic stability of the camera is improved, and design goal is reached. The site acceptance test confirmed the proper operation of the new mechanism.  
poster icon Poster WEPE37 [7.016 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE37  
About • paper received ※ 09 September 2016       paper accepted ※ 16 September 2016       issue date ※ 22 June 2017  
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WEPE39 Fabrication, Assembly, and Metrology Methods to Optimize an Adjustable Exit Slit for a Soft X-ray Beamline ion, feedback, insertion, site 374
 
  • J.H. Takakuwa, C.D. Hernikl, T.M. Lipton, T.A. Stevens, T. Warwick
    LBNL, Berkeley, California, USA
  
  Exit slit edge geometry and paired edge parallelism can directly impact performance of a synchrotron beamline. At the same time, maximizing the performance of an existing design is often a financial and logistical necessity. The construction project for beamline 7.0.1 (BL7.0.1, COherent Scattering and MICroscopy (COSMIC)) at the Advanced Light Source (ALS) facility located at Lawrence Berkeley National Laboratory (LBNL) consists of two branch lines, each of which has vertical and horizontal slit assemblies. These assemblies were fabricated from a preexisting design, positively impacting project schedule and budget. Apart from orientation, the slit assemblies are identical. The goal for parallelism is ± 2 microns over the full 25 mm length. The each slit blade edge can travel ± 5 mm about the beam center with the resolution of a micron; slits can scan over that range with a nominal size of about 10 microns. A variety of fabrication and metrology techniques were implemented to maximize the performance of the current design and future areas of improvement in fabrication, metrology, and design were identified.  
poster icon Poster WEPE39 [3.111 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE39  
About • paper received ※ 07 September 2016       paper accepted ※ 16 September 2016       issue date ※ 22 June 2017  
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WEPE40 Two-rotation Mechanism for an in Vacuum Beamstop ion, detector, scattering, experiment 378
 
  • J.B. González Fernández, C. Colldelram, A. Fontserè Recuenco, G. Jover-Mañas, J. Ladrera Fernández, M. Malfois, J.C. Martínez Guil
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  At Small-angle X-ray Scattering beamlines (SAXS), beamstops are needed to block the intense primary beam that has not been scattered by the sample in order to protect the detector from any damage. Beamstops are usually confined inside a vacuum tube minimizing air space between the sample and the detector. For certain experiments, a motorized beamstop is required to achieve a precise positioning in different regions of the detector active area. ALBA has developed a new motorized beamstop* consisting of a two-rotation mechanism inside vacuum that composes a movement able to cover all range of the active area of the detector. The presented solution involves a main rotation reached by a gear and a worm drive actuated by a stepper motor and a second rotation relative to the main one produced by a piezo rotation stage. For each position appears two different solutions. This characteristic permits take two equivalent images in the detector with the same beamstop position but different orientation in the beamstop support; thus permitting the compensation of the support shadow on the active area of the detector.
* Patent Registered 		 
poster icon Poster WEPE40 [2.217 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE40  
About • paper received ※ 08 September 2016       paper accepted ※ 16 September 2016       issue date ※ 22 June 2017  
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THAA02 Mechanical Engineering of a Cryo STXM at CLS ion, laser, cryogenics, radiation 381
 
  • C.N. Regier, A.F.G. Leontowich, D.M. Taylor
    CLS, Saskatoon, Saskatchewan, Canada
  
  A Scanning Transmission X-ray Microscope (STXM) is a useful imaging tool, but its application to certain types of samples is limited by significant rates of x-ray damage to the sample. Cooling samples to liquid nitrogen temperatures can delay radiation damage, but must be done in a vacuum environment to prevent rapid formation of ice on the sample. The Canadian Light Source (CLS) has constructed a Cryo-STXM, which can maintain sample temperatures at 100 K in an ultra-high vacuum environment and rotate the samples in the beam to collect tomographic data sets. This presentation will discuss the mechanical engineering aspects of the development of this Cryo-STXM including the finite element analysis (FEA) for stresses and vibrations, and present the performance parameters being achieved by the instrument.  
slides icon Slides THAA02 [4.645 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-THAA02  
About • paper received ※ 11 September 2016       paper accepted ※ 16 September 2016       issue date ※ 22 June 2017  
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THAA04 Upgrading a Transmission SAX/WAX Beamline to Allow High Quality GISAX/GIWAX Experiments for Soft Matter Thin Films ion, detector, scattering, alignment 390
 
  • A.R. Marshall
    DLS, Oxfordshire, United Kingdom
  
  The project required a sample environment to deliver experiments in vacuum or helium, with high humidity, including capacity to use aggressive solvents. The compact, transportable system incorporates a high precision in-vacuum manipulator/ positioning stage (with repeatability better than1 µm/ 1 mdeg) allowing for multiple sample configurations. Current sample mounts include in-situ film formation (Doctor Blade), thermal annealing/drying heater stage, sample cooling and multiple sample stages; the system has been designed to accommodate many sample substrate formats. The existing end station camera system has been upgraded to include two, in-vacuum, WAXS and SAXS area detectors, which are custom builds based on the Pilatus 6M. The SAX detector module includes three in vacuum, independent ,configurable SAXS beam stop manipulators to block GISAXS transmitted, reflected and specular flare as well as isotropic and anisotropic SAX, a photon sensitive detector shutter plate is included. The 4 mm diameter tungsten beamstops each include a miniature photodiode to measure beam intensity and can be positioned to within 10 µm precision in X and Y over 300 mm x 250 mm motion range.  
slides icon Slides THAA04 [6.245 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-THAA04  
About • paper received ※ 09 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, controls, hardware, 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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FRAA01 Engineering Challenges on the I14 Nanoprobe Beamline ion, detector, optics, cryogenics 398
 
  • A. Peach, F. Cacho-Nerin, J. Parker, P.D. Quinn
    DLS, Oxfordshire, United Kingdom
  
  An overview of the double branch 185m I14 Nano-probe beam-line under construction at DLS will be presented together with the end-station design in further detail. The end station consists of a split vacuum vessel containing a KB mirror configuration (at UHV) and the sample environment (at HV) which is just 50mm from the end of the final KB optic. An in-vacuum detector is mounted between the KB and the sample whilst two externally mounted detectors will operate between 0.25m & 3m from the sample. Four cryogenic samples can be brought into the vessel at a time and transferred remotely to the sample position with cooling provided by a Helium pulse tube cooler. With an initial 50nm size beam, stability is absolutely critical and careful attention has been paid in the design to mitigate any thermal and structural sources of vibration. An array of interferometers reference the KB mirrors and sample position and will be used to actively correct for any drifts. The very tight space constraints involved have greatly increased the complexity and duration of the design but testing of prototypes is now underway. The system is scheduled for build and test through the Autumn 2016.  
slides icon Slides FRAA01 [15.581 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-FRAA01  
About • paper received ※ 09 September 2016       paper accepted ※ 23 September 2016       issue date ※ 22 June 2017  
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FRAA03 Mechanical Design of MIRAS, Infrared Microspectroscopy Beam Line at ALBA Synchrotron ion, simulation, extraction, radiation 403
 
  • L.R.M. Ribó, C. Colldelram, A. Crisol, A.A. Gevorgyan, R. Monge, J. Nicolás, L. Nikitina, M. Quispe, I. Sics, I. Yousef
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  • P. Dumas
    SOLEIL, Gif-sur-Yvette, France
  • G. Ellis
    CSIC, Madrid, Spain
  
  The infraredμspectroscopy beam line has been an In House project fully developed at ALBA as a result of a collaboration of different teams during the period 2014 where the design started to 2016 It is composed by a retractile mirror to extract the IR light from the bending magnet radiation and a system of 8 transport mirrors located by positioning systems designed for a high stability performance, to transport the extracted light outside the tunnel until the first End Station  
slides icon Slides FRAA03 [5.469 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-FRAA03  
About • paper received ※ 09 September 2016       paper accepted ※ 20 September 2016       issue date ※ 22 June 2017  
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FRBA01 A New Crystal Bender for the ID31 Laue-Laue Monochromator ion, SRF, controls, cryogenics 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, controls 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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FRBA03 Design of the Diamond Light Source DMM for the VMXi Beamline ion, optics, GUI, radiation 420
 
  • D.J. Butler, J.H. Kelly
    DLS, Oxfordshire, United Kingdom
  
  A Double Multilayer Monochromator (DMM) was designed in-house for the VMXi beam-line. This paper describes the novel engineering solutions employed to build a high stability instrument. PiezoMotor® actuators drive sine-arm Bragg axes for both optics providing the coarse and fine motion in a single actuator. The long translation of the second multilayer is driven externally via a linear shift to eliminate in-vacuum pipe & cable motions. A high stability air bearing translates the whole DMM across the two multilayer stripes. The optics are water cooled via an Indium / Gallium eutectic alloy bath to minimise coupled vibrations. The DMM is operational on the VMXi beam-line, experimental and performance data is presented.  
slides icon Slides FRBA03 [8.899 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-FRBA03  
About • paper received ※ 09 September 2016       paper accepted ※ 19 September 2016       issue date ※ 22 June 2017  
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