MEDSI2016 - List of Keywords (undulator)

Paper	Title	Other Keywords	Page
MOPE31	Dynamic Performance of a Support System for BBA Components in SXFEL	ion, FEL, electron, quadrupole	80
	F. Gao, R.B. Deng, Y.X. Dong, X. Hu, Z. Jiang, S. Sun, L. Wang, Y.M. Wen SINAP, Shanghai, People’s Republic of China
	The electron beam orbit stability is very important for the Free Electron Laser (FEL) facility. The high beam position stability requirement results in the high position stability for the FEL key components, such as quadruple magnet (Q) and beam position monitor (BPM). This work focus on the research of the dynamic performance of a mechanical support system composed of mechanical supports - including sheets and adjustments - and a granite block mounted on them. It will be applied for the beam based alignment (BBA) Q magnet and BPM for the Soft X-ray FEL project (SXFEL). The Finite-element -FE- calculations of the model characteristics were carried out to guide the subsequent tests. The test results show that the support system can meet the requirement of the SXFEL project.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE31
About •	paper received ※ 09 September 2016 paper accepted ※ 14 September 2016 issue date ※ 22 June 2017
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TUPE15	Thermal Management and Crystal Clamping Concepts for the New High-Dynamics DCM for Sirius	ion, synchrotron, radiation, simulation	194
	M. Saveri Silva, R.R. Geraldes, A. Gilmour LNLS, Campinas, Brazil T.A.M. Ruijl, R.M. Schneider MI-Partners, Eindhoven, The Netherlands
	Funding: Brazilian Ministry of Science, Technology and Inovation 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). In order to achieve high-bandwidth control and stability of a few nrad, as well as to prevent unpredicted mounting and clamping distortions, new solutions are proposed for crystal fixation and thermal management. Since the design is based on flexural elements, it should be indeed highly predictable, so that the work was developed using mechanical and thermal FEA, including CFD. Efforts were made to predict thermal boundaries associated with the synchrotron beam, including incident, diffracted and scattered power, for which the undulator spectrum was employed in the Monte Carlo simulation package - FLUKA . "FLUKA: a multi-particle transport code", A. Ferrari, P.R. Sala, A. Fasso‘, and J. Ranft, CERN-2005-10 (2005), INFN/TC₀5/11, SLAC-R-773
	Poster TUPE15 [2.630 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE15
About •	paper received ※ 08 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017
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TUPE19	Application of a NEG Coated Chamber at the Canadian Light Source	ion, vacuum, storage-ring, 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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TUPE38	Progress and Mechanical Engineering of FEL Projects at SINAP	FEL, ion, electron, linac	246
	L. Yin, W. Fang, X. Hu, S. Sun, L. Wang, L.Y. Yu, W. Zhang SINAP, Shanghai, People’s Republic of China
	Free electron laser (FEL) technology is the next focus at Shanghai Institute of Applied Physics (SINAP). Shanghai Deep Ultraviolet Free-Electron Laser (SDUV-FEL), a test facility for new FEL principles, was operated for 5 years and got a series of important results. Dalian Coherent Light Source (DCLS), a 50~150nm wavelength FEL user facility based on a 300MeV linac located at Dalian Institute of Chemical Physics, started beam commissioning in August. Shanghai X-ray Free-Electron Laser (SXFEL), a soft X-ray FEL test facility based on an 840MeV linac, will be installed in this month and the commissioning is scheduled at the beginning of 2017. The Progress of the FEL projects and the mechanical engineering in the design and construction are presented.
	Poster TUPE38 [8.096 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE38
About •	paper received ※ 07 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017
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TUPE40	Cryo-Ready Undulator U15: Passing SOLEIL’s 2 Meters Threshold in Useful Magnetic Length	ion, electron, FEL, storage-ring	249
	M. Tilmont, F. Briquez, N. Béchu, L. Chapuis, M.-E. Couprie, J.M. Dubuisson, J.P. Duval, C. Herbeaux, A. Lestrade, J.L. Marlats, M. Sebdaoui, K.T. Tavakoli, C. de Olivera SOLEIL, Gif-sur-Yvette, France
	The U15 is an in-vacuum undulator designed to operate at room temperature and at 70K. It is the first in-vacuum undulator designed, assembled and which will be used in SOLEIL’s storage ring that have support beams for magnets longer than 2 meters. A clear gap is felt in the technologies used for manufacturing and assembling compared to our standard 2m length in-vacuum undulators. This is due, in part, to the tolerances imposed by the maximum phase error admissible in SOLEIL’s storage ring. The poster will shine lights on those difficulties from a design and manufacturing point of view.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE40
About •	paper received ※ 11 September 2016 paper accepted ※ 21 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, 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 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, vacuum, 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 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, controls, 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 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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WECA06	Mechanical Engineering Solutions for COXINEL Project	ion, electron, laser, quadrupole	299
	K.T. Tavakoli, T. André, I.A. Andriyash, C. Basset, C. Benabderrahmane, P. Berteaud, S. Bobault, S. Bonnin, F. Bouvet, F. Briquez, L. Chapuis, M.-E. Couprie, D. Dennetière, Y. Dietrich, J.P. Duval, M. El Ajjouri, T.K. El Ajjouri, C. Herbeaux, N. Hubert, M. Khojoyan, M. Labat, N. Leclercq, A. Lestrade, A. Loulergue, O. Marcouillé, F. Marteau, A. Mary, P. N’gotta, F. Polack, P. Rommeluère, M. Sebdaoui, F. Thiam, M. Valléau, J. Vétéran, D. Zerbib, C. de Olivera SOLEIL, Gif-sur-Yvette, France J. Gautier, G. Lambert, V. Malka, J.Y. Roussé, K. Ta Phuoc, C. Thaury LOA, Palaiseau, France E. Roussel Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	Funding: European Research Council (ERC) advance grant COXINEL (COherent Xray source INferred from Electrons accelerated by Laser) is a European Research Council (ERC) advance grant aims at demonstrating Free Electron Laser amplification at 200 nm with 180 MeV electrons generated by laser plasma acceleration. A special electron beam transfer line with adequate diagnostics has been designed for this project. Strong-focusing variable-field permanent magnet quadrupoles, energy de-mixing chicane and a set of conventional quadrupoles condition the electron beam before its entrance to an In-Vacuum U20 undulator. This presentation describes some of the features incorporated into the design of the magnets, girders, vacuum vessels and diagnostic equipment for this experimental machine. Progress on the equipment preparation and installation is presented as well.
	Slides WECA06 [33.987 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WECA06
About •	paper received ※ 02 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017
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WEPE03	Beamline Front Ends at the 2.5-GeV Photon Factory Storage Ring	photon, ion, wiggler, storage-ring	315
	H. Miyauchi, S. Asaoka, T. Tahara KEK, Ibaraki, Japan
	Since the first commissioning in 1982, the 2.5-GeV Photon Factory storage ring has been upgraded three times in 1986, 1997 and 2005, in order to reduce the beam emittance and to create new four short straight sections for in-vacuum short period undulators. To satisfy the new boundary conditions of the upgrades, the beamline front ends were re-designed. We look back on the history of the beamline front-end components at the Photon Factory.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE03
About •	paper received ※ 15 September 2016 paper accepted ※ 23 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, vacuum, radiation	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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WEPE18	APS 2-ID Beamline, Upgrade to Canted Configuration	ion, radiation, photon, synchrotron	342
	D. Capatina, M.A. Beno, M.V. Fisher, J.J. Knopp, B. Lai, E.R. Moog, C. Roehrig, S. Vogt ANL, Argonne, Illinois, USA
	Funding: Work at the Advanced Photon Source is supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. To provide independent operation of the two 2-ID beamline experimental stations, a new canted beamline design is being developed. The constraint of keeping the existing front end limits the canting angle. The optimal canting angle was determined to be 400 urad and is achieved by using a permanent magnet. A coil is added to the canting magnet to provide a steering adjustment of maxi-mum 40 to 50 urad. In order to increase the beam separation as well as to provide power filtering and higher harmonics rejection for the downstream optics, a dual mirror system with focusing capability is used as the first optic at approximately 28 m from the center of the straight section. The inboard mirror (2.6 mrad) reflects the inboard beam outboard while the outboard mirror (4.1 mrad) reflects the outboard beam inboard. The beam presented to the dual mirror system is defined by two 1 mm x 1 mm apertures. The maximum power absorbed by each mirror is 200 W. Two vertically deflecting monochromators with minimum offset of 17 mm are located in the First Optical Enclosure on the outboard branch. The monochromator for the inboard branch is located in the corresponding experimental station.
	Poster WEPE18 [3.357 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE18
About •	paper received ※ 07 September 2016 paper accepted ※ 19 September 2016 issue date ※ 22 June 2017
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Paper

Title

Other Keywords

Page

MOPE31

Dynamic Performance of a Support System for BBA Components in SXFEL

ion, FEL, electron, quadrupole

80

F. Gao, R.B. Deng, Y.X. Dong, X. Hu, Z. Jiang, S. Sun, L. Wang, Y.M. Wen
SINAP, Shanghai, People’s Republic of China

The electron beam orbit stability is very important for the Free Electron Laser (FEL) facility. The high beam position stability requirement results in the high position stability for the FEL key components, such as quadruple magnet (Q) and beam position monitor (BPM). This work focus on the research of the dynamic performance of a mechanical support system composed of mechanical supports - including sheets and adjustments - and a granite block mounted on them. It will be applied for the beam based alignment (BBA) Q magnet and BPM for the Soft X-ray FEL project (SXFEL). The Finite-element -FE- calculations of the model characteristics were carried out to guide the subsequent tests. The test results show that the support system can meet the requirement of the SXFEL project.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE31

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paper received ※ 09 September 2016 paper accepted ※ 14 September 2016 issue date ※ 22 June 2017

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TUPE15

Thermal Management and Crystal Clamping Concepts for the New High-Dynamics DCM for Sirius

ion, synchrotron, radiation, simulation

194

M. Saveri Silva, R.R. Geraldes, A. Gilmour
LNLS, Campinas, Brazil
T.A.M. Ruijl, R.M. Schneider
MI-Partners, Eindhoven, The Netherlands

Funding: Brazilian Ministry of Science, Technology and Inovation
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). In order to achieve high-bandwidth control and stability of a few nrad, as well as to prevent unpredicted mounting and clamping distortions, new solutions are proposed for crystal fixation and thermal management. Since the design is based on flexural elements, it should be indeed highly predictable, so that the work was developed using mechanical and thermal FEA, including CFD. Efforts were made to predict thermal boundaries associated with the synchrotron beam, including incident, diffracted and scattered power, for which the undulator spectrum was employed in the Monte Carlo simulation package - FLUKA *.
* "FLUKA: a multi-particle transport code", A. Ferrari, P.R. Sala, A. Fasso‘, and J. Ranft, CERN-2005-10 (2005), INFN/TC₀5/11, SLAC-R-773

Poster TUPE15 [2.630 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE15

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paper received ※ 08 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017

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TUPE19

Application of a NEG Coated Chamber at the Canadian Light Source

ion, vacuum, storage-ring, 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;

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE19

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paper received ※ 15 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017

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TUPE38

Progress and Mechanical Engineering of FEL Projects at SINAP

FEL, ion, electron, linac

246

L. Yin, W. Fang, X. Hu, S. Sun, L. Wang, L.Y. Yu, W. Zhang
SINAP, Shanghai, People’s Republic of China

Free electron laser (FEL) technology is the next focus at Shanghai Institute of Applied Physics (SINAP). Shanghai Deep Ultraviolet Free-Electron Laser (SDUV-FEL), a test facility for new FEL principles, was operated for 5 years and got a series of important results. Dalian Coherent Light Source (DCLS), a 50~150nm wavelength FEL user facility based on a 300MeV linac located at Dalian Institute of Chemical Physics, started beam commissioning in August. Shanghai X-ray Free-Electron Laser (SXFEL), a soft X-ray FEL test facility based on an 840MeV linac, will be installed in this month and the commissioning is scheduled at the beginning of 2017. The Progress of the FEL projects and the mechanical engineering in the design and construction are presented.

Poster TUPE38 [8.096 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE38

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paper received ※ 07 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017

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TUPE40

Cryo-Ready Undulator U15: Passing SOLEIL’s 2 Meters Threshold in Useful Magnetic Length

ion, electron, FEL, storage-ring

249

M. Tilmont, F. Briquez, N. Béchu, L. Chapuis, M.-E. Couprie, J.M. Dubuisson, J.P. Duval, C. Herbeaux, A. Lestrade, J.L. Marlats, M. Sebdaoui, K.T. Tavakoli, C. de Olivera
SOLEIL, Gif-sur-Yvette, France

The U15 is an in-vacuum undulator designed to operate at room temperature and at 70K. It is the first in-vacuum undulator designed, assembled and which will be used in SOLEIL’s storage ring that have support beams for magnets longer than 2 meters. A clear gap is felt in the technologies used for manufacturing and assembling compared to our standard 2m length in-vacuum undulators. This is due, in part, to the tolerances imposed by the maximum phase error admissible in SOLEIL’s storage ring. The poster will shine lights on those difficulties from a design and manufacturing point of view.

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE40

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paper received ※ 11 September 2016 paper accepted ※ 21 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, 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 TUPE41 [1.374 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE41

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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, vacuum, 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 WECA03 [11.263 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WECA03

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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, controls, 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 WECA04 [12.616 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WECA04

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paper received ※ 10 September 2016 paper accepted ※ 03 October 2016 issue date ※ 22 June 2017

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WECA06

Mechanical Engineering Solutions for COXINEL Project

ion, electron, laser, quadrupole

299

K.T. Tavakoli, T. André, I.A. Andriyash, C. Basset, C. Benabderrahmane, P. Berteaud, S. Bobault, S. Bonnin, F. Bouvet, F. Briquez, L. Chapuis, M.-E. Couprie, D. Dennetière, Y. Dietrich, J.P. Duval, M. El Ajjouri, T.K. El Ajjouri, C. Herbeaux, N. Hubert, M. Khojoyan, M. Labat, N. Leclercq, A. Lestrade, A. Loulergue, O. Marcouillé, F. Marteau, A. Mary, P. N’gotta, F. Polack, P. Rommeluère, M. Sebdaoui, F. Thiam, M. Valléau, J. Vétéran, D. Zerbib, C. de Olivera
SOLEIL, Gif-sur-Yvette, France
J. Gautier, G. Lambert, V. Malka, J.Y. Roussé, K. Ta Phuoc, C. Thaury
LOA, Palaiseau, France
E. Roussel
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy

Funding: European Research Council (ERC) advance grant
COXINEL (COherent Xray source INferred from Electrons accelerated by Laser) is a European Research Council (ERC) advance grant aims at demonstrating Free Electron Laser amplification at 200 nm with 180 MeV electrons generated by laser plasma acceleration. A special electron beam transfer line with adequate diagnostics has been designed for this project. Strong-focusing variable-field permanent magnet quadrupoles, energy de-mixing chicane and a set of conventional quadrupoles condition the electron beam before its entrance to an In-Vacuum U20 undulator. This presentation describes some of the features incorporated into the design of the magnets, girders, vacuum vessels and diagnostic equipment for this experimental machine. Progress on the equipment preparation and installation is presented as well.

Slides WECA06 [33.987 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WECA06

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paper received ※ 02 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017

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WEPE03

Beamline Front Ends at the 2.5-GeV Photon Factory Storage Ring

photon, ion, wiggler, storage-ring

315

H. Miyauchi, S. Asaoka, T. Tahara
KEK, Ibaraki, Japan

Since the first commissioning in 1982, the 2.5-GeV Photon Factory storage ring has been upgraded three times in 1986, 1997 and 2005, in order to reduce the beam emittance and to create new four short straight sections for in-vacuum short period undulators. To satisfy the new boundary conditions of the upgrades, the beamline front ends were re-designed. We look back on the history of the beamline front-end components at the Photon Factory.

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE03

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paper received ※ 15 September 2016 paper accepted ※ 23 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, vacuum, radiation

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.

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE04

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paper received ※ 07 September 2016 paper accepted ※ 21 September 2016 issue date ※ 22 June 2017

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WEPE18

APS 2-ID Beamline, Upgrade to Canted Configuration

ion, radiation, photon, synchrotron

342

D. Capatina, M.A. Beno, M.V. Fisher, J.J. Knopp, B. Lai, E.R. Moog, C. Roehrig, S. Vogt
ANL, Argonne, Illinois, USA

Funding: Work at the Advanced Photon Source is supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
To provide independent operation of the two 2-ID beamline experimental stations, a new canted beamline design is being developed. The constraint of keeping the existing front end limits the canting angle. The optimal canting angle was determined to be 400 urad and is achieved by using a permanent magnet. A coil is added to the canting magnet to provide a steering adjustment of maxi-mum 40 to 50 urad. In order to increase the beam separation as well as to provide power filtering and higher harmonics rejection for the downstream optics, a dual mirror system with focusing capability is used as the first optic at approximately 28 m from the center of the straight section. The inboard mirror (2.6 mrad) reflects the inboard beam outboard while the outboard mirror (4.1 mrad) reflects the outboard beam inboard. The beam presented to the dual mirror system is defined by two 1 mm x 1 mm apertures. The maximum power absorbed by each mirror is 200 W. Two vertically deflecting monochromators with minimum offset of 17 mm are located in the First Optical Enclosure on the outboard branch. The monochromator for the inboard branch is located in the corresponding experimental station.

Poster WEPE18 [3.357 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE18

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paper received ※ 07 September 2016 paper accepted ※ 19 September 2016 issue date ※ 22 June 2017

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