兰州重离子加速器深层治癌束流线真空系统  

Vacuum System of Heavy Ion Cancer Therapy Beam Line of HIRFL

作　　者：杨晓天[1] 张军辉[1] 蒙峻[1,2] 张喜平[1] 杨伟顺[1] 郭宗辉[1,2] 郭迪舟[1,2] 赵玉刚[1] 胡振军[1] 侯生军[1] 

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]中国科学院研究生院,北京100039

出　　处：《真空科学与技术学报》2009年第S1期46-50,共5页Chinese Journal of Vacuum Science and Technology

基　　金：中国科学院科技创新工程重大项目(No.KJCX1-YW-004)

摘　　要：重离子深层治癌束流线从兰州重离子加速器冷却储存环(HIRFL-CSR)主环引出,利用能量为100MeV/u～430MeV/ u的碳离子束,开展治疗体内各种癌症的深层治癌研究。该束流线真空系统包括极高真空段、超高真空段和大气段,采用不同的真空获得方案和工艺路线,分别在极高真空段和超高真空段获得了8×10^(-10)Pa和1×10^(-6)Pa的真空度,并顺利实现了束流线的真空过渡,保证了HIRFL-CSR主环极高真空系统的安全运行;研制了适用于高频率扫描磁铁内放置的真空管道,消除了涡流对束流的影响;对隔离真空和大气的大尺寸膜窗材料进行了调研,选择高强度塑料膜(Hostaphan)和加强纤维膜(Kevlar)联合使用,既能让束流通过,又不会产生危害人体的中子,并能够有足够的强度抵御大气压力。该束流线真空系统的建成为重离子深层治癌的研究提供了良好的真空条件。The heavy ion cancer therapy beam line is one of the experimental terminals of HTRFL-CSR main ring which is used to the study and the treatment of various cancers inside the human body with the beam energy of 100～430MeV/u.The vacuum system of the beam line includes XHV section,UHV section and atmosphere section.With different vacuum obtaining procedures,the pressure of 8×10^(-10) Pa and 1×10^(-6) Pa were achieved in XHV section and UHV section respectively.The pressure transition form XHV to UHV was smooth and the pressure of CSRm of 10^(-10) Pa was not affected at all.Both the ultra-thin stainless steel tube and the ceramic tubes were developed for the high frequency scanning magnets to eliminate the eddy current.The window material which seqarates vacuum and atmosphere was investigated, and the Hostaphan plastic film and the Kevlar fiber were chosen to use together to withstand the atmosphere pressure and without neutron produced.The vacuum system provided a suitable vacuum condition for the study of the heavy ion cancer therapy.

关 键 词：重离子加速器 重离子束治癌 超高/极高真空系统 涡流 大尺寸膜窗 

分 类 号：TB751[一般工业技术—真空技术]