Transient analysis of pressure distribution in ultra-high vacuum interlock protection system

Chang Renchao; Wei Wei; Zhao Feng; Zhu Xiaoxiao; Zhang Hao

doi:10.11884/HPLPB202537.250023

Article Contents

Article Navigation > High Power Laser and Particle Beams > 2025 > Accepted Manuscript

Chang Renchao, Wei Wei, Zhao Feng, et al. Transient analysis of pressure distribution in ultra-high vacuum interlock protection system[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250023

Citation:

Chang Renchao, Wei Wei, Zhao Feng, et al. Transient analysis of pressure distribution in ultra-high vacuum interlock protection system[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250023

Citation:

PDF( 8575 KB)

Transient analysis of pressure distribution in ultra-high vacuum interlock protection system

doi: 10.11884/HPLPB202537.250023

Institute of Advanced Science Facilities, Shenzhen 518107, China

Received Date: 2025-02-13
Accepted Date: 2025-09-24
Rev Recd Date: 2025-10-01

Available Online: 2025-10-17

Abstract

Abstract

Background
Shenzhen Superconducting Soft X-Ray Free Electron Laser (S³FEL) is newly proposed by Institute of Advanced Science Facilities, Shenzhen (IASF). The linear accelerator based on TESLA-type superconducting RF cavity is used to obtain high-repetition-frequency and high-gradient field. The cryomodule is the most challenging core part in S³FEL device and ultra-high vacuum differential system is located at the module beam pipe outlet, which is used to realize the transition from cryomodule to ambient temperature section. The vacuum interlock protection is required on differential system to protect the superconducting RF cavity in cryomodule from emergency.
Purpose
This study aims to analyze the transient process of quick protection.
Method
Traditional fast closing valve protection process is only calculated according to gas molecular rate, and the finite element method and the Monte Carlo method are used in this paper.
Result
The transient pressure distribution results of sensor-fast closing valve section show that setting the sensor 8-10 m away from the fast closing valve can provide sufficient buffer reaction time.
Conclusions
The differential system analyses show that the pressure here reaches 1E-5 Pa within 2 s when the gate valve is completely closed, corresponding to leakage sizes of 0.5 mm, which still maintains a high-vacuum environment and meets working requirement of ion pumps. This work provides important theory basis for the S³FEL.
- free electron laser,
- high repetitive frequency,
- differential system,
- vacuum interlock protection,
- finite element analysis,
- monte carlo

FullText(HTML)

References(20)

References

[1]	赵振堂. 先进X射线光源加速器原理与关键技术[M]. 上海: 上海交通大学出版社, 2020 Zhao Zhentang. Principles and key technologies of advanced X-ray light source accelerators[M]. Shanghai: Shanghai Jiao Tong University Press, 2020
[2]	Huang Zhirong, Lindau I. SACLA hard-X-ray compact FEL[J]. Nature Photonics, 2012, 6(8): 505-506. doi: 10.1038/nphoton.2012.184
[3]	Zapfe K, Böhnert M, Hensler O, et al. The vacuum system of the European X-ray free electron laser XFEL[J]. Journal of Physics: Conference Series, 2008, 100: 092001. doi: 10.1088/1742-6596/100/9/092001
[4]	Zhao Zhentang, Wang Dong, Gu Qiang, et al. SXFEL: a soft X-ray free electron laser in China[J]. Synchrotron Radiation News, 2017, 30(6): 29-33. doi: 10.1080/08940886.2017.1386997
[5]	Bharadwaj V. LCLS II design[R]. Menlo Park: SLAC National Accelerator Laboratory, 2018.
[6]	Huang Yawei, Yao Zhitao, Liu Yuefeng, et al. Design and test results of the vacuum barrier for SHINE linac[C]//Proceedings of the 28th International Cryogenic Engineering Conference and International Cryogenic Materials Conference. 2023: 256-264.
[7]	Wang Xiaofan, Zeng Li, Shao Jiahang, et al. Physical design for Shenzhen superconducting soft X-ray free-electron laser (S³FEL)[C]//14th International Particle Accelerator Conference. 2023: 1852-1855.
[8]	张浩, 赵峰, 林涵文, 等. S³FEL束流测试平台注入段废束桶束窗设计[J]. 强激光与粒子束, 2025, 37: 054001 Zhang Hao, Zhao Feng, Lin Hanwen, et al. Design of injector dump beam window for the electron beam test platform of S³FEL[J]. High Power Laser and Particle Beams, 2025, 37: 054001
[9]	张浩, 黄礼明, 林涵文, 等. S³FEL束流测试平台注入段废束桶束窗安全性分析[J]. 强激光与粒子束, 2025, 37: 106032 Zhang Hao, Huang Liming, Lin Hanwen, et al. Safety analysis of injector dump beam window for the electron beam test platform of S³FEL[J]. High Power Laser and Particle Beams, 2025, 37: 106032
[10]	Hu L B, Wang X L, Yang L, et al. Conceptual design of S³FEL cryogenic system[J]. IOP Conference Series: Materials Science and Engineering, 2022, 1240: 012092. doi: 10.1088/1757-899X/1240/1/012092
[11]	Li Han, He Chaofeng, Yue Weiming, et al. Dedicate SRF cryomodule test facilities for S³FEL[C]//21st International Conference on RF Superconductivity. 2023: 298-301.
[12]	Passarelli D, Parise M, Nicol T H, et al. High-vacuum simulations and measurements on the SSR1 cryomodule beam-line[C]//17th International Conference on RF Superconductivity. 2015: 754-756.
[13]	Swierblewski J, Bednarski M, Dzieza B, et al. Improvements of the mechanical, vacuum and cryogenic procedures for European XFEL cryomodule testing[C]//17th International Conference on RF Superconductivity. 2015: 906-909.
[14]	Qin Yuanshuai, Zhang Peng, Cai Hanjie, et al. Transfer line including vacuum differential system for a high-power windowless target[J]. Physical Review Accelerators and Beams, 2020, 23: 113002. doi: 10.1103/PhysRevAccelBeams.23.113002
[15]	Wang Wen, Zhang Qingkun, Wang Yongfeng, et al. Design and experimental validation of differential pumped vacuum system for HINEG windowless gas target[J]. Fusion Engineering and Design, 2023, 189: 113465. doi: 10.1016/j.fusengdes.2023.113465
[16]	Zhang Jianchuan, Min Yue, Li Lili, et al. Design and realization of vacuum control and interlock system for SESRI project[J]. Radiation Detection Technology and Methods, 2022, 6(4): 502-507. doi: 10.1007/s41605-022-00357-x
[17]	Pigny G, Antoniotti F, Boivin J P, et al. Measurements, alarms and interlocks in the vacuum control system of the LHC[C]//15th International Conference on Accelerator and Large Experimental Physics Control Systems. 2015: 338-341.
[18]	达道安. 真空设计手册[M]. 2版. 北京: 国防工业出版社, 1991 Da Dao’an. Handbook of vacuum technology[M]. 2nd ed. Beijing: National Defense Industry Press, 1991
[19]	Bi Hailin, Zhang Yicong, He Ziyang, et al. A coupled NS-DSMC method applied to supersonic molecular beam and experimental validation[J]. Vacuum, 2023, 214: 112228. doi: 10.1016/j.vacuum.2023.112228
[20]	Dommach M, Di Felice M, Dickert B, et al. The photon beamline vacuum system of the European XFEL[J]. Journal of Synchrotron Radiation, 2021, 28(4): 1229-1236. doi: 10.1107/S1600577521005154