摘要
针对强流重离子加速器(HIAF)中增强器(BRing)和放射性次级束流分离器(HFRS)之间的BRing引出线真空系统进行极高真空到超高真空的过渡研究。研究表明,为不使处于极高真空状态下的BRing环真空系统受到来自HFRS和高能束运线的影响,通过烘烤段加非烘烤段的方式以及快关阀的作用,可有效地解决真空系统从极高真空到超高真空的过渡问题,并且能够有效地起到对BRing主真空的保护作用。通过对BRing引出线真空系统进行真空压力分布的模拟计算,从侧面更加验证了真空过渡方案的可行性。
Herein,we reported the transition technique from extreme high vacuum,1 × 10^（-9） Pa,in the beam extraction line of booster ring（ BRing） to ultrahigh vacuum,5 × 10^（-7） Pa,in fragment separator of High Intensity Heavy-Ion Accelerator Facility. The original work included the fast-closing valve and non-evaporable getter pump,installed in the middle between the baked and unbaked segments of 66 m long BRing beam extraction line. The influence of the fast-closing valve on the pressure distributions in the baked/unbaked segments separately pumped was mathematically modeled,numerically simulated with VAKTRAK software,and experimentally evaluated. The simulated results show that the transition from 1 × 10 （-9） to 5 × 10（-7） Pa can be routinely and reliably performed. The simulated and measured results were in good agreement. In addition,the fast closing valve is capable of protecting the whole vacuum system against any accidental collapse.
作者
柴振
蒙峻
罗成
朱小荣
谢文君
郑亚军
Chai Zhen;Meng Jun;Luo Cheng;Zhu Xiaorong;Xie Wenjun;Zheng Yajun(Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2018年第9期805-809,共5页
Chinese Journal of Vacuum Science and Technology
关键词
极高真空系统
真空压力分布
真空过渡
Extra-high vacuum system
Vacuum pressure distribution
Vacuum transition
