用于重离子治癌的大面积平行板雪崩计数器  

A Large Area PPAC for Using in Tumor Therapy with Heavy Ions

作　　者：胡正国[1] 郭忠言[1] 詹文龙[1] 肖国青[1] 徐瑚珊[1] 王猛[1] 毛瑞士[1] 李加兴[1] 孙志宇[1] 陈志强[1] 陈立新[1] 白洁[1] 李琛[1] 张金霞[1] 李存藩[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：《原子核物理评论》2004年第1期17-20,共4页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(10205019;19825115;19735051);国家重点基础研究发展规划资助项目(G2000077400;G2000077401;G2000077404)~~

摘　　要：简单介绍了重离子治癌的原理,叙述了一种用于重离子治癌的大面积平行板雪崩计数器,它主要由入射窗、x位置栅极、中心阳极、y位置栅极和出射窗组成.使用C3F8气体,气压700Pa,阳极电压为700V,两阴极接地,电子学成形时间常数为2μs,测试得到的位置分辨修正后为0.54mm(FWHM).通过与国内外同类装置比较,认为这一分辨已经满足了重离子治癌装置的要求.The principle of the heavy-ion therapy is introduced in this article. In order to precisely determine the irradiation profiles and positions of scanned heavy-ion beams, we developed a large area parallel plate avalanche counter(PPAC). The detector consists of one anode, two cathodes and two windows with 250 mm×250 mm active area . It was measured at an anode voltage of 700 V and with flowing C_(3)F_(8) gas at the pressure of 700 Pa. A position resolution of 0.54 mm by correction was obtained with an α-source. As compared with the similar devices, we consider the position resolution of the PPAC can satisfy the requirement of the facility of heavy-ion therapy.

关 键 词：重离子治癌 大面积平行板雪崩计数器 位置分辨 阳极工作电压 电子学系统 

分 类 号：R730.55[医药卫生—肿瘤] O571.6[医药卫生—临床医学]