200MeV电子直线加速器隧道内及速调管走廊内的瞬发辐射场  

THE PROMPT RADIATION FIELD IN THE 200 MeV LINAC TUNNEL AND THE KLYSTRON GALLERY

作　　者：李裕熊[1] 李珏忻[1] 许炳[1] 吴璨[1] 梁任又 

机构地区：[1]中国科技大学国家同步辐射实验室,合肥230029

出　　处：《辐射防护》1999年第6期414-419,共6页Radiation Protection

摘　　要：直线加速器隧道内存在着一个具有特定时间结构和空间分布的强瞬发辐射场，它主要由轫致辐射和中子组成。用丙氨酸剂量计和电子自旋共振（ＥＳＲ）方法进行测量，得到隧道内关键位置的三维空间辐射场分布。这对于了解加速器的运行状态和射线积累剂量对各种有机材料的损伤程度是有意义的。速调管走廊内的辐射场主要是由于大功率速调管的运行造成的，因各个速调管参数不一致而使各点的辐射剂量呈现出较大的差异。但速调管走廊内的辐射水平不太高，故允许人员有条件地进入其中工作，因此在辐射安全联锁系统中将其定为可绕过的联锁点。本文简单介绍国家同步辐射实验室这两处辐射场的特点。There exists a strong prompt radiation field with special time structure and space distribution in the linac tunnel. It consists of bremsstrahlung and neutrons. To obtain the 3D radiation field distribution at the important positions, the Alanine/ESR method is selected. It is significant for understanding the accelerator operation state and the organic material damage caused by the integral radiation dose. The radiation field in the klystron gallery mainly comes from the klystrons. It varies because of the different parameters of each klystron. Since the radiation level is not very high, the operators can be allowed to enter the gallery with permission. The gallery gates are considered as the bypass interlock points. This paper introduces the radiation field characteristics of the linac tunnel and klystron gallery, and describes and measurement method and results as well. (

关 键 词：瞬发辐射场 直线加速器 速调管走廓 ESR 剂量计 

分 类 号：TL530.1[核科学技术—核技术及应用]