强激光与粒子束2025，Vol.37Issue(12)：64-71,8.DOI:10.11884/HPLPB202537.250023
超高真空联锁保护系统中的压强分布瞬态分析
Transient analysis of pressure distribution in ultra-high vacuum interlock protection system
摘要
Abstract
[Background]Shenzhen Superconducting Soft X-Ray Free Electron Laser(S3FEL)is a facility newly proposed by Institute of Advanced Science Facilities,Shenzhen(IASF).The linear accelerator based on a TESLA-type superconducting RF cavity is used to obtain a high-repetition-frequency and high-gradient field.The cryomodule is the most challenging core part of the 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 for the differential system to protect the superconducting RF cavity in cryomodule from emergencies.[Purpose]This study aims to analyze the transient process of rapid protection.[Method]The traditional fast closing valve protection process is only calculated according to the gas molecular rate.In this paper,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 10-5 Pa within 2 s when the gate valve is completely closed,corresponding to a leakage size of 0.5 mm,which still maintains a high-vacuum environment and meets the working requirements of ion pumps.This work provides an important theoretical basis for the S3FEL.关键词
自由电子激光/高重频/差分段/真空联锁保护/有限元分析Key words
free electron laser/high repetitive frequency/differential system/vacuum interlock protection/finite element analysis引用本文复制引用
常仁超,尉伟,赵峰,朱潇潇,张浩..超高真空联锁保护系统中的压强分布瞬态分析[J].强激光与粒子束,2025,37(12):64-71,8.基金项目
深圳市科技计划项目(JCYJ20220530140807017) （JCYJ20220530140807017）
