HIRFL大型真空系统  

The vacuum system of HIRFL

作　　者：杨晓天[1] 张军辉[1] 蒙峻[1] 游志明[1] 贾豫生[1] 牛志伟[1] 聂曾森[1] 楼美玲[1] 杨伟顺[1] 赵玉刚[1] 侯生军[1] 胡振军[1] 郝超英[1] 马向利[1] 郭迪舟[1] 

机构地区：[1]中国科学院近代物理研究所,甘肃兰州730000

出　　处：《真空》2010年第4期60-64,共5页Vacuum

摘　　要：HIRFL是兰州重离子加速器装置的英文首字母缩写,其真空系统是一个大型综合性系统。HIRFL由离子源、扇聚焦回旋加速器SFC、分离扇回旋加速器SSC和多用途的重离子冷却储存环(HIRFL-CSR)组成。多条束流运输线将这些加速器连接在一起,同时将各种重离子束流送往10多个实验终端。根据加速离子和束流寿命的需要,对各加速器真空度的要求是不同的:SFC已有50多年的历史,经过3次升级改造,真空度从10-4 Pa提高到10-6 Pa;建于上世纪八十年代的SSC真空度也为10-6 Pa;而两个重离子冷却储存环(CSRm和CSRe)的真空度达到10-10Pa以保证重离子有足够长的储存寿命。多条连接束运线根据不同实验终端的要求,其真空系统的设计方案也不同,文中列举了微束实验终端采取的防振措施;为充气反冲谱仪设计的清洁、大流量真空差分系统及为重离子治癌等终端设计的超薄壁扫描磁铁真空管道等。The vacuum system of Heavy Ion Research Facility in Lanzhou（HIRFL） is a large and complex system.HIRFL consists of two ECR ion sources,a sector focus cyclotron（SFC）,a separate sector cyclotron（SSC） and a multi-purpose cooling storage ring system which has a main ring（CSRm） and an experiment ring（CSRe）.Several beam lines connect these accelerators together and transfer various heavy ion beams to more than 10 experiment terminals.According to the requirements of the ion acceleration and ion lifetime,the working pressure in each accelerator is different.SFC was developed over 50 years ago and had been upgraded three times.After upgrading,the working pressure in SFC is improved from 10-4Pa to 10-6Pa.The pressure in SSC which was built in 1980s reaches the same level.As to the working pressures of the two cooling storage rings,ie.,CSRm and CSRe,they are both up to 10-10Pa so as to guarantee that the lifetime of heavy ions are long enough.Different designs were adopted for vacuum systems of dozens of beam lines to meet specific requirement of each experiment terminal.For instance,some shockproof measures have to be taken for the heavy ion microbeam facility;a clean and large throughput differential pumping system was built for the Gas-filled Recoil Separator;special pipes were used in the magnetic scanners mounted in the beam lines for heavy ion cancer therapy terminal.

关 键 词：重离子加速器 真空系统 工作真空度 离子储存寿命 

分 类 号：TL503.7[核科学技术—核技术及应用]