MEDSI2016 - Classification: Light Sources / Insertion Devices

Paper	Title	Page
TUPE39	Feasibility of a 4.5-T Cryogenic Permanent-Magnet Wavelength Shifter
	C.-H. Chang, H.-H. Chen, J.C. Huang, C.-S. Hwang, Y.T. Yu NSRRC, Hsinchu, Taiwan C.-S. Hwang NCTU, Hsinchu, Taiwan
	Funding: Work supported by the Ministry of Science and Technology, ROC under Contract No. MOST 103-2221-E-213-001-MY2 A three-pole wavelength shifter with a cryogenic permanent magnet is designed to extend the critical photon energy in a 3-GeV storage ring to 27-keV Xrays. The cryogenic wavelength shifter has a PrFeB permanent magnet and a vanadium-cobalt-steel (Permendur) pole to produce a magnetic field of flux density 4.5 T at fixed gap 5 mm. The magnet structure is optimized to prevent irreversible demagnetization of the permanent magnet near 300 K. A 77-K cryo-cooler is used to cool the magnets and to maintain the magnets at a uniform temperature, 77 K, in the vacuum vessel. This work describes the advanced design of the magnetic field and the simulations of the cooling temperature for the compact wavelength-shifter magnet.
	Poster TUPE39 [1.949 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE40	Cryo-Ready Undulator U15: Passing SOLEIL’s 2 Meters Threshold in Useful Magnetic Length	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
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE41	Design and Development of a System of Hybrid Type to Measure the Magnetic Field of a Cryogenic Undulator	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
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE42	Insertion Device Installation Status at MAX IV
	A. Thiel MAX IV Laboratory, Lund University, Lund, Sweden
	At present the first five insertion devices have been installed in the 3GeV-ring of MAX IV. Two of these are in house built Apple II devices with period lengths 48mm and 53mm. These two undulators cover the entire available straight section length and are designed for a minimum mechanical gap of 11mm. The flat extruded aluminium vacuum chamber is supported by 5 points of suspension in order to minimize bending effects. Magnetic and mechanical shimming was finished and both undulators have been fiducialized before the installation. The final alignement in the ring bases on their magnetic centre as reference. With the weight of 13.5t per undulator ground transportation was demanding. A special transport frame has been designed and mounted to ease air cushion and fork lift transport.
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WECA03	Experience With the Commissioning of the U15-Undulator for SwissFEL-Aramis Beamline and New Developments for the Athos Beamline	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
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WECA04	Horizontal-Gap Vertically-Polarizing Undulator (HGVPU) Design Challenges and Resolutions	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
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

TUPE39

Feasibility of a 4.5-T Cryogenic Permanent-Magnet Wavelength Shifter

C.-H. Chang, H.-H. Chen, J.C. Huang, C.-S. Hwang, Y.T. Yu
NSRRC, Hsinchu, Taiwan
C.-S. Hwang
NCTU, Hsinchu, Taiwan

Funding: Work supported by the Ministry of Science and Technology, ROC under Contract No. MOST 103-2221-E-213-001-MY2
A three-pole wavelength shifter with a cryogenic permanent magnet is designed to extend the critical photon energy in a 3-GeV storage ring to 27-keV Xrays. The cryogenic wavelength shifter has a PrFeB permanent magnet and a vanadium-cobalt-steel (Permendur) pole to produce a magnetic field of flux density 4.5 T at fixed gap 5 mm. The magnet structure is optimized to prevent irreversible demagnetization of the permanent magnet near 300 K. A 77-K cryo-cooler is used to cool the magnets and to maintain the magnets at a uniform temperature, 77 K, in the vacuum vessel. This work describes the advanced design of the magnetic field and the simulations of the cooling temperature for the compact wavelength-shifter magnet.

Poster TUPE39 [1.949 MB]

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE40

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

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

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE41

Design and Development of a System of Hybrid Type to Measure the Magnetic Field of a Cryogenic Undulator

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

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE42

Insertion Device Installation Status at MAX IV

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

At present the first five insertion devices have been installed in the 3GeV-ring of MAX IV. Two of these are in house built Apple II devices with period lengths 48mm and 53mm. These two undulators cover the entire available straight section length and are designed for a minimum mechanical gap of 11mm. The flat extruded aluminium vacuum chamber is supported by 5 points of suspension in order to minimize bending effects. Magnetic and mechanical shimming was finished and both undulators have been fiducialized before the installation. The final alignement in the ring bases on their magnetic centre as reference. With the weight of 13.5t per undulator ground transportation was demanding. A special transport frame has been designed and mounted to ease air cushion and fork lift transport.

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WECA03

Experience With the Commissioning of the U15-Undulator for SwissFEL-Aramis Beamline and New Developments for the Athos Beamline

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

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WECA04

Horizontal-Gap Vertically-Polarizing Undulator (HGVPU) Design Challenges and Resolutions

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

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)