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

HU Zhengguo1; 2 XU Zhiguo1 XIAO Guoqing1 SUN Zhiyu1 XU Hushan1 ZHANG Xueheng1; 2 MAO Ruishi1; 2 ZHANG Hongbin1 HUANG Tianheng1; 2 FU Fen1; 2 TANG Bin1; 2 TU Xiaolin1; 2 WANG Meng1 XIAO Zhigang1 WANG Jiansong1 LI Qiang1 GUO Zhongyan1 1

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

更新时间：2021-03-12

- An ionization chamber developed for the facility of heavy ions therapy at IMP
- NUCLEAR TECHNIQUES Issue 2, (2007)
- 作者机构：
  
  1. 中国科学院近代物理研究所
  2. 中国科学院近代物理研究所兰州730000中国科学院研究生院北京,100049
- 作者简介：
- 基金信息：
  
  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
- DOI：
  CLC： R730.5
- Published：01 February 2007
- 稿件说明：
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[1]胡正国,徐治国,肖国青,孙志宇,徐瑚珊,章学恒,毛瑞士,张宏斌,黄天衡,付芬,唐彬,涂小林,王猛,肖志刚,王建松,李强,郭忠言.一台用于IMP重离子治癌线上的电离室[J].核技术,2007(02):139-142.

HU Zhengguo1, 2 XU Zhiguo1 XIAO Guoqing1 SUN Zhiyu1 XU Hushan1 ZHANG Xueheng1, 2 MAO Ruishi1, et al. An ionization chamber developed for the facility of heavy ions therapy at IMP[J]. Nuclear techniques, 2007, (2): 139-142.
[1]胡正国,徐治国,肖国青,孙志宇,徐瑚珊,章学恒,毛瑞士,张宏斌,黄天衡,付芬,唐彬,涂小林,王猛,肖志刚,王建松,李强,郭忠言.一台用于IMP重离子治癌线上的电离室[J].核技术,2007(02):139-142. DOI：

HU Zhengguo1, 2 XU Zhiguo1 XIAO Guoqing1 SUN Zhiyu1 XU Hushan1 ZHANG Xueheng1, 2 MAO Ruishi1, et al. An ionization chamber developed for the facility of heavy ions therapy at IMP[J]. Nuclear techniques, 2007, (2): 139-142. DOI：

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。

Abstract

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. During the test

the voltage of 2300 V was applied to the anode of the IC. The measured Bragg peak for 75 MeV/u 12C6+ ions in the PMMA was located at 13.73 mm and the FWHM was 0.19mm.

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