HI-13串列加速器重离子辐照束流线的物理设计  

Physics design of heavy-ion irradiation beam line on HI-13 tandem accelerator

作　　者：朱飞[1] 彭朝华[1] 胡跃明[1] 焦学胜[1] 陈东风[1] 曹亚丽[2] 

机构地区：[1]中国原子能科学研究院核物理研究所,北京102413 [2]环境保护部核与辐射安全中心,北京100082

出　　处：《核技术》2014年第2期22-26,共5页Nuclear Techniques

摘　　要：重离子微孔膜是一种新型的过滤材料,其在医疗和生物制剂、电子工业、食品工业、环境科学、材料科学等领域有广泛的应用前景。应用中国原子能科学研究院HI-13串列加速器提供的32S辐照聚酯薄膜研制微孔膜,其微孔均匀度由束流流强的均匀度决定,要求得到微孔均匀度好于90%。本文采用八极磁铁校正法对高斯分布束流进行校正,校正后的束流可近似得到均匀分布。设计计算了辐照束流线光路参数,并分析了光学元件安装准直公差对束流均匀度的影响。结果表明,安装准直公差会对束流中心轨迹偏移造成很大影响,破坏辐照均匀度,运用导向磁铁调束可以满足均匀度要求。本研究为重离子微孔滤膜的工业化生产提供了一种实践可行的方法,具有很好的实用性。Background： Heavy-ion microporous membrane is a new kind of filter material, which has prosperous application in the fields of medical and biological agents, electronic, food, environmental science, materials science, etc. Purpose： Polyester membranes were irradiated with 32S produced by HI-13 tandem accelerator to develop a microporous membrane at CIAE, and the irradiation uniformity is determined by the beam distribution, also the microporous uniformity is required higher than 90%. Methods： An octupole magnet was used to correct the beam distribution from Gauss to uniform. Meanwhile, main parameters of beam line were given, and the alignment tolerances for optical elements were also analyzed. Results： Alignment tolerance of the optical elements could cause great influence on the beam center deviation in the process of correction, which would destroy the irradiation uniformity. Steering magnet was applied to meet with the design requirements. Conclusion： This study provides a practical and feasible way for industrial production of heavy-ion microporous membrane.

关 键 词：微孔膜 八极磁铁 束流均匀度 

分 类 号：TL52[核科学技术—核技术及应用]