Study of shielding design for SANS at CSNS  

作　　者：梁泰然 沈飞 殷雯 于全芝 喻纯旭 陶举洲 梁天骄 

机构地区：[1]School of Physics, Nankai University [2]Institute of Physics, Chinese Academy of Sciences [3]Institute of High Energy Physics, Chinese Academy of Sciences [4]School of Nuclear Science and Technology, Lanzhou University

出　　处：《Chinese Physics C》2014年第7期144-148,共5页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(91026009,11174358,11075203)

摘　　要：The small angle neutron scattering （SANS） instrument is presently being constructed at Chinese Spal- lation Neutron Source （CSNS） in China, and the biological shielding design is needed to prevent the instrument from causing excessive dose rates in accessible locations. In this paper, the study of shielding design for SANS that relies on Monte Carlo simulation is introduced. Beam line shielding calculations are performed considering both scenarios of closed versus open TO chopper. The basic design scheme of the beam stop is discussed. The size of the TO chopper rotor is also estimated.The small angle neutron scattering （SANS） instrument is presently being constructed at Chinese Spal- lation Neutron Source （CSNS） in China, and the biological shielding design is needed to prevent the instrument from causing excessive dose rates in accessible locations. In this paper, the study of shielding design for SANS that relies on Monte Carlo simulation is introduced. Beam line shielding calculations are performed considering both scenarios of closed versus open TO chopper. The basic design scheme of the beam stop is discussed. The size of the TO chopper rotor is also estimated.

关 键 词：neutron beam line shielding design Monte Carlo calculation 

分 类 号：O571.53[理学—粒子物理与原子核物理]