一台用于IMP重离子治癌线上的电离室  

An ionization chamber developed for the facility of heavy ions therapy at IMP

作　　者：胡正国[1] 徐治国[1] 肖国青[1] 孙志宇[1] 徐瑚珊[1] 章学恒[1] 毛瑞士[1] 张宏斌[1] 黄天衡[1] 付芬[1] 唐彬[1] 涂小林[1] 王猛[1] 肖志刚[1] 王建松[1] 李强[1] 郭忠言[1] 

机构地区：[1]中国科学院近代物理研究所

出　　处：《核技术》2007年第2期139-142,共4页Nuclear Techniques

基　　金：国家自然科学基金(10305015;10475098);国家基金委创新研究群体科学基金(10221003)资助项目

摘　　要：介绍一种用于中国科学院近代物理研究所(IMP)重离子肿瘤治疗线上、于纵向场常压下工作的气体电离室,其灵敏面积为250mm×250mm,极间距离为10mm,电离室工作气体为P10,在85kPa下流气式工作。用75MeV/u12C离子入射,测量了电离室的坪曲线。发现电离室工作坪区900—3000V,12C的Bragg峰位于13.73mm,峰的极大值半高宽(FWHM)为0.19mm。An ionization chamber (IC) with a sensitive area of 250mm×250 mm was developed for the Institute of Modern Physics (IMP) heavy ion therapy facility. The gap was 10 mm between the anode and the cathode. A good plateau was seen in a large voltage range from 900V to 3000V when the IC was operated at (85.0±0.2) kPa with P10 (10% CH4+90% Ar) as flowing gas. By putting the different thicknesses of polymethyl methacrylate (PMMA) in front of the IC, the Bragg curve for the beam in PMMA was measured by the IC. Durin...

关 键 词：重离子治癌 电离室 Bragg曲线 正电子影像装置 

分 类 号：R730.5[医药卫生—肿瘤]