12MeV无损检测用电子直线加速器靶的验证计算  

Confirm Calculation of 12 MeV Non-destructive Testing Electron Linear Accelerator Target

作　　者：马淑栋[1] 张入通[1] 郭彦斌[1] 周媛[1] 李学先[1] 陈岩[1] 

机构地区：[1]北京机械工业自动化研究所,北京100120

出　　处：《原子能科学技术》2012年第3期364-369,共6页Atomic Energy Science and Technology

基　　金：国家数控机床重大专项资助项目(2009ZX04014-091)

摘　　要：本文研究12MeV无损检测用电子直线加速器靶的验证计算。首先通过具体分析无损检测用电子直线加速器中电子与靶相互作用的物理机理,由经验公式计算推得最佳靶厚及对应的靶产额、剂量率分布、X光子的转换效率;其次运用MCNP对常用靶材W、Au、Ta产生的X光子剂量率分布和转换效率进行对比计算,确定最佳靶材及靶厚;最后与实验结果对比,验证了靶计算过程的正确性。The confirm calculation of 12 MeV non-destructive testing （NDT） electron linear accelerator （LINAC） target was studied. Firstly, the most optimal target thick- ness and related photon dose yield, distributions of dose rate, and related photon con- version efficiencies were got by calculation with specific analysis of the physical mecha- nism of the interactions between the beam and target; Secondly, the photon dose rate distribution, converter efficiencies, and thickness of various kinds of targets, such as W, Au, Ta, etc. were verified by MCNP simulation and the most optimal target was got using the MCNP code; Lastly, the calculation results of theory and MCNP were compared to confirm the validity of target calculation.

关 键 词：12 MeV无损检测用电子直线加速器 靶厚 转换效率 MCNP 剂量率分布 

分 类 号：O59[理学—应用物理]