FLS2023 - Table of Session: TH1D (Working Group D: Key Technologies)

Paper	Title	Page
TH1D1	Application of Superconducting Undulator Technology for Hard X-ray Production at European XFEL
	B. Marchetti, S. Abeghyan, J.E. Baaderpresenter, S. Casalbuoni, M. Di Felice, U. Englisch, G. Geloni, V. Grattoni, D. La Civita, C. Lechner, S. Serkez, H. Sinn, M. Vannoni, M. Yakopov, P.Z. Ziolkowski EuXFEL, Schenefeld, Germany S. Barbanotti, W. Decking, H.-J. Eckoldt, A. Hauberg, K. Jensch, S. Lederer, L. Lilje, S. Liu, R. Ramalingam, T. Schnautz, R. Wichmann, T. Wohlenberg, I. Zagorodnov, R. Zimmermann DESY, Hamburg, Germany A.W. Grau KIT, Karlsruhe, Germany A.T. Potter Cockcroft Institute, Warrington, Cheshire, United Kingdom A.T. Potter The University of Liverpool, Liverpool, United Kingdom
	The advancement of superconducting undulator (SCU) technology is of strategic importance for the future development of the European XFEL facility. To build the know-how to implement superconducting undulators for its future upgrades, several projects are ongoing: a prototype SCU module (S-PRESSO) for an afterburner in the hard X-ray undulator line SASE2 is being procured; two test stands (SUNDAE1 and SUNDAE2) for the characterization of SCU are being developed; advanced SCU coils are designed and manufactured in house. In this presentation, we describe the status and plans of those projects and highlight their expected performances.
	Slides TH1D1 [2.645 MB]
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TH1D2	A Bulk Superconductor and its Application to Insertion Devices	224
	T. Kii Kyoto University, Kyoto, Japan
	Funding: This work was supported by KAKENHI JP17H01127 and JP22H03870 High-field short-period undulator will be one of the key technologies for the future light sources. Various approaches have been continued under the limitation of materials for permanent/superconducting magnets. A use of bulk superconductor is attractive for its high current density under existence of high magnetic field. The critical current density for rare-earth barium copper oxide (REBCO) bulk superconductor exceeds 10 kA/mm2 even at 10 K in a field range below about 3 T and exceeds 20 kA/mm2 at 4.2 K. In order to utilize the quite high current density in the bulk REBCO and to generate periodic magnetic field we proposed bulk superconductor staggered array undulator in 2006. Recently we have developed the third undulaor prototype which consists of 6T solenoid and 6 period of bulk REBCO array, and successfully demonstrated periodic field amplitude of 2.22 T for period length of 10 mm and undulator gap of 4.0 mm at 7 K. In the presentation, we will summarize properties and performances of bulk REBCO superconductors and discuss on the performance of bulk superconductor staggered array undulator and potential as an insertion device for the future light sources. T. Kii et al.: Proc. FEL2006 (2006) p. 653.
	Slides TH1D2 [2.682 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-FLS2023-TH1D2
About •	Received ※ 22 August 2023 — Revised ※ 23 August 2023 — Accepted ※ 31 August 2023 — Issued ※ 02 December 2023
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TH1D3	SCU Development at the LCLS for Future FELs
	P. Krejcik, G.J. Bouchard, G.L. Gassner, Z. Huang, E.M. Kraft, B. Lam, M.A. Montironi, C.D. Nantista, D.C. Nguyen, H.-D. Nuhn, Z.R. Wolf, Z. Zhang SLAC, Menlo Park, California, USA J.M. Byrd, J.D. Fuerst, E. Gluskin, Y. Ivanyushenkov, M. Kasa, M.F. Qian, Y. Shiroyanagi ANL, Lemont, Illinois, USA X. Permanyer ESS, Lund, Sweden
	A joint SLAC/ANL development program is underway at the LCLS to demonstrate the advantages of SCUs for FEL beamlines. SCUs offer significant advantages for future FEL beam lines in gain length, wavelength reach, and tunability. The program leverages the storage ring SCUs developed at ANL and addresses the issues of integration in FELs and attaining the necessary micron precision for BBA. Our new modular cryomodule design is extendable to a full-length FEL and integrates the additional FEL components such as the phase shifter, quadrupole and RFBPM into the cold mass to achieve a high packing fraction and minimize the average gain length. Initially, 2 such cryomodules will be installed as afterburners at the end of the existing hard x-ray FEL beam line at the LCLS in order to measure the gain length and validate the beam based alignment procedure based on precision motion control of the cold mass internal to the cryomodule. We report on the status of the testing of these critical components on our precision alignment test stand, and discuss future plans for multiple FEL beamlines to be housed in a single cryomodule as part of the future LCLS expansion program for more user stations.
	Slides TH1D3 [2.384 MB]
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TH1D4	Bi-periodic Undulator: Innovative Insertion Device for SOLEIL II	228
	A. Potet, F. Blache, P. Brunelle, M.-E. Couprie, O. Marcouillé, A. Mary, T. Mutin, A. Nadji, K. Tavakoli, C. de Oliveira SOLEIL, Gif-sur-Yvette, France
	SOLEIL II project will lead to optimize the production of photons by a modification of the present facility. The storage ring will be redesigned to reduce electron beam emittance, increase photon beam flux and brightness, and improve beamline resolution. The number of magnetic elements will be increased and the space reserved for insertion devices will be decreased by 30%. SOLEIL magnetic group searches for solutions to generate different magnetic periods in a smaller space to maintain the full spectral domain. Bi-Periodic undulator is an innovative and compact device allowing the use of two selectable magnetic periodicities by superimposition of magnets. The magnetic period can be switched from one value to its triple value by mechanical shift of magnetic arrays. A magnetic design has been performed and the construction of a prototype, including magnetic measurements and corrections, is under progress. The prototype will be installed in the storage ring with the goal to verify the feasibility of the model and to characterize the system. The magnetic fields, the radiation produced and the electron beam dynamics will be considered to have a complete knowledge on this undulator.
	Slides TH1D4 [2.442 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-FLS2023-TH1D4
About •	Received ※ 23 August 2023 — Revised ※ 26 August 2023 — Accepted ※ 31 August 2023 — Issued ※ 02 December 2023
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Paper

Title

Page

TH1D1

Application of Superconducting Undulator Technology for Hard X-ray Production at European XFEL

B. Marchetti, S. Abeghyan, J.E. Baaderpresenter, S. Casalbuoni, M. Di Felice, U. Englisch, G. Geloni, V. Grattoni, D. La Civita, C. Lechner, S. Serkez, H. Sinn, M. Vannoni, M. Yakopov, P.Z. Ziolkowski
EuXFEL, Schenefeld, Germany
S. Barbanotti, W. Decking, H.-J. Eckoldt, A. Hauberg, K. Jensch, S. Lederer, L. Lilje, S. Liu, R. Ramalingam, T. Schnautz, R. Wichmann, T. Wohlenberg, I. Zagorodnov, R. Zimmermann
DESY, Hamburg, Germany
A.W. Grau
KIT, Karlsruhe, Germany
A.T. Potter
Cockcroft Institute, Warrington, Cheshire, United Kingdom
A.T. Potter
The University of Liverpool, Liverpool, United Kingdom

The advancement of superconducting undulator (SCU) technology is of strategic importance for the future development of the European XFEL facility. To build the know-how to implement superconducting undulators for its future upgrades, several projects are ongoing: a prototype SCU module (S-PRESSO) for an afterburner in the hard X-ray undulator line SASE2 is being procured; two test stands (SUNDAE1 and SUNDAE2) for the characterization of SCU are being developed; advanced SCU coils are designed and manufactured in house. In this presentation, we describe the status and plans of those projects and highlight their expected performances.

Slides TH1D1 [2.645 MB]

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

TH1D2

A Bulk Superconductor and its Application to Insertion Devices

224

T. Kii
Kyoto University, Kyoto, Japan

Funding: This work was supported by KAKENHI JP17H01127 and JP22H03870
High-field short-period undulator will be one of the key technologies for the future light sources. Various approaches have been continued under the limitation of materials for permanent/superconducting magnets. A use of bulk superconductor is attractive for its high current density under existence of high magnetic field. The critical current density for rare-earth barium copper oxide (REBCO) bulk superconductor exceeds 10 kA/mm2 even at 10 K in a field range below about 3 T and exceeds 20 kA/mm2 at 4.2 K. In order to utilize the quite high current density in the bulk REBCO and to generate periodic magnetic field we proposed bulk superconductor staggered array undulator in 2006*. Recently we have developed the third undulaor prototype which consists of 6T solenoid and 6 period of bulk REBCO array, and successfully demonstrated periodic field amplitude of 2.22 T for period length of 10 mm and undulator gap of 4.0 mm at 7 K. In the presentation, we will summarize properties and performances of bulk REBCO superconductors and discuss on the performance of bulk superconductor staggered array undulator and potential as an insertion device for the future light sources.
* T. Kii et al.: Proc. FEL2006 (2006) p. 653.

Slides TH1D2 [2.682 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-FLS2023-TH1D2

About •

Received ※ 22 August 2023 — Revised ※ 23 August 2023 — Accepted ※ 31 August 2023 — Issued ※ 02 December 2023

Cite •

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

TH1D3

SCU Development at the LCLS for Future FELs

P. Krejcik, G.J. Bouchard, G.L. Gassner, Z. Huang, E.M. Kraft, B. Lam, M.A. Montironi, C.D. Nantista, D.C. Nguyen, H.-D. Nuhn, Z.R. Wolf, Z. Zhang
SLAC, Menlo Park, California, USA
J.M. Byrd, J.D. Fuerst, E. Gluskin, Y. Ivanyushenkov, M. Kasa, M.F. Qian, Y. Shiroyanagi
ANL, Lemont, Illinois, USA
X. Permanyer
ESS, Lund, Sweden

A joint SLAC/ANL development program is underway at the LCLS to demonstrate the advantages of SCUs for FEL beamlines. SCUs offer significant advantages for future FEL beam lines in gain length, wavelength reach, and tunability. The program leverages the storage ring SCUs developed at ANL and addresses the issues of integration in FELs and attaining the necessary micron precision for BBA. Our new modular cryomodule design is extendable to a full-length FEL and integrates the additional FEL components such as the phase shifter, quadrupole and RFBPM into the cold mass to achieve a high packing fraction and minimize the average gain length. Initially, 2 such cryomodules will be installed as afterburners at the end of the existing hard x-ray FEL beam line at the LCLS in order to measure the gain length and validate the beam based alignment procedure based on precision motion control of the cold mass internal to the cryomodule. We report on the status of the testing of these critical components on our precision alignment test stand, and discuss future plans for multiple FEL beamlines to be housed in a single cryomodule as part of the future LCLS expansion program for more user stations.

Slides TH1D3 [2.384 MB]

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TH1D4

Bi-periodic Undulator: Innovative Insertion Device for SOLEIL II

228

A. Potet, F. Blache, P. Brunelle, M.-E. Couprie, O. Marcouillé, A. Mary, T. Mutin, A. Nadji, K. Tavakoli, C. de Oliveira
SOLEIL, Gif-sur-Yvette, France

SOLEIL II project will lead to optimize the production of photons by a modification of the present facility. The storage ring will be redesigned to reduce electron beam emittance, increase photon beam flux and brightness, and improve beamline resolution. The number of magnetic elements will be increased and the space reserved for insertion devices will be decreased by 30%. SOLEIL magnetic group searches for solutions to generate different magnetic periods in a smaller space to maintain the full spectral domain. Bi-Periodic undulator is an innovative and compact device allowing the use of two selectable magnetic periodicities by superimposition of magnets. The magnetic period can be switched from one value to its triple value by mechanical shift of magnetic arrays. A magnetic design has been performed and the construction of a prototype, including magnetic measurements and corrections, is under progress. The prototype will be installed in the storage ring with the goal to verify the feasibility of the model and to characterize the system. The magnetic fields, the radiation produced and the electron beam dynamics will be considered to have a complete knowledge on this undulator.

Slides TH1D4 [2.442 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-FLS2023-TH1D4

About •

Received ※ 23 August 2023 — Revised ※ 26 August 2023 — Accepted ※ 31 August 2023 — Issued ※ 02 December 2023

Cite •

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