MEDSI2023 - List of Keywords (cryomodule)

Paper	Title	Other Keywords	Page
WEOAM04	Development of Low-Frequency Superconducting Cavities for High Energy Photon Source	cavity, HOM, photon, superconducting-cavity	129
	X.Y. Zhang, J. Dai, L. Guo, Q. Ma, F. Meng, P. Zhang, H.J. Zheng IHEP, Beijing, People’s Republic of China
	Funding: This work was supported in part by High Energy Photon Source, and in part by the National Natural Science Foundation of China under Grant 12005241. A low-frequency superconducting cavity is one of the most critical devices in the High Energy Photon Source (HEPS), a 6 GeV diffraction-limited synchrotron light source under construction in Beijing. A higher-order-mode (HOM) damped 166.6 MHz ß=1 quarter-wave superconducting cavity, first of its kind in the world, has been designed by the Institute of High Energy Physics. Compact structure, excellent electromagnetic and mechanical properties and manufacturability were realized. Mounted with a forward power coupler, a tuner, two thermal break beam tubes, a collimating taper transition, two gate valves and some shielded bellows, the dressed cavity was then assembled into a cryomodule. Two cryomodules were later required to fit into HEPS straight sections with a length limitation of 6 meters, which posed a significant challenge for the design of the cavity string. The success of the horizontal test also verifies the design of the cavity string. This article presents the design, fabrication, post-processing, system integration, and cryogenic tests of the first HOM-damped compact 166.6 MHz superconducting cavity module.
	Slides WEOAM04 [23.093 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOAM04
About •	Received ※ 25 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPPP045	Particle-Free Engineering in SHINE Superconducting Linac Vacuum System	vacuum, cavity, FEL, linac	219
	Y.L. Zhao, Y. Liu, Y.F. Liu, Q. Tang, L. Yin SARI-CAS, Pudong, Shanghai, People’s Republic of China
	The Shanghai high-repetition-rate XFEL and extreme light facility (SHINE) is under design and construction. The linac of SHINE facility is superconducting accelerat-ing structures of high gradients, whose performance is closely related to the cleanliness of superconducting cavities. Therefore, the beam line vacuum system has extremely high requirement for particle free to avoid particles down to submicrometric scale. To control parti-cle contamination, particle-free environment has been built for cavity string assembly and other beam line vacuum components installation, clean assembly criteri-on has been established. Furthermore, the particle gener-ation of vacuum components (valve, pump, et al.) has been studied. Moreover, dedicated equipment and com-ponent (slow pumping & slow venting system, non-contact RF shielding bellow) have been developed for particle-free vacuum system.
	Poster WEPPP045 [1.429 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP045
About •	Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 28 June 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

WEOAM04

Development of Low-Frequency Superconducting Cavities for High Energy Photon Source

cavity, HOM, photon, superconducting-cavity

129

X.Y. Zhang, J. Dai, L. Guo, Q. Ma, F. Meng, P. Zhang, H.J. Zheng
IHEP, Beijing, People’s Republic of China

Funding: This work was supported in part by High Energy Photon Source, and in part by the National Natural Science Foundation of China under Grant 12005241.
A low-frequency superconducting cavity is one of the most critical devices in the High Energy Photon Source (HEPS), a 6 GeV diffraction-limited synchrotron light source under construction in Beijing. A higher-order-mode (HOM) damped 166.6 MHz ß=1 quarter-wave superconducting cavity, first of its kind in the world, has been designed by the Institute of High Energy Physics. Compact structure, excellent electromagnetic and mechanical properties and manufacturability were realized. Mounted with a forward power coupler, a tuner, two thermal break beam tubes, a collimating taper transition, two gate valves and some shielded bellows, the dressed cavity was then assembled into a cryomodule. Two cryomodules were later required to fit into HEPS straight sections with a length limitation of 6 meters, which posed a significant challenge for the design of the cavity string. The success of the horizontal test also verifies the design of the cavity string. This article presents the design, fabrication, post-processing, system integration, and cryogenic tests of the first HOM-damped compact 166.6 MHz superconducting cavity module.

Slides WEOAM04 [23.093 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOAM04

About •

Received ※ 25 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 December 2023

Cite •

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

WEPPP045

Particle-Free Engineering in SHINE Superconducting Linac Vacuum System

vacuum, cavity, FEL, linac

219

Y.L. Zhao, Y. Liu, Y.F. Liu, Q. Tang, L. Yin
SARI-CAS, Pudong, Shanghai, People’s Republic of China

The Shanghai high-repetition-rate XFEL and extreme light facility (SHINE) is under design and construction. The linac of SHINE facility is superconducting accelerat-ing structures of high gradients, whose performance is closely related to the cleanliness of superconducting cavities. Therefore, the beam line vacuum system has extremely high requirement for particle free to avoid particles down to submicrometric scale. To control parti-cle contamination, particle-free environment has been built for cavity string assembly and other beam line vacuum components installation, clean assembly criteri-on has been established. Furthermore, the particle gener-ation of vacuum components (valve, pump, et al.) has been studied. Moreover, dedicated equipment and com-ponent (slow pumping & slow venting system, non-contact RF shielding bellow) have been developed for particle-free vacuum system.

Poster WEPPP045 [1.429 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP045

About •

Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 28 June 2024

Cite •

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