低真空中高能电子束传输特性的MC模拟  

Monte Carlo simulation of electron beam transportation characteristics under low-vacuum condition

作　　者：栾希亭[1] 邓永锋[2] 谭畅[2] 韩先伟[2] 毛根旺[1] 

机构地区：[1]西北工业大学航天学院,西安710072 [2]陕西动力机械设计研究所,西安710100

出　　处：《核技术》2010年第12期928-932,共5页Nuclear Techniques

基　　金：国家自然科学基金(10905044;50911120076)资助

摘　　要：基于Geant4蒙特卡罗程序包建立了低真空条件下高能电子束的输运模型,并用该模型详细研究了电子束在低真空条件的传输特性。结果表明,低真空条件下电子束传输特性与高真空下的有较大差异,环境气体对电子束有散射作用,而磁场可有效约束高能电子的传输轨迹,最终轨迹是磁场约束作用与环境气体散射作用竞争的结果。对于确定的磁场分布,电子束能量存在一个最佳范围,从而保证电子束的传输特性。Based on Geant4 Monte Carlo toolkit, a numerical model is established to simulate the electron beam transportation characteristics trader low-vacuum condition. The results indicate that the low-vacuum transportation characteristics differ greatly from the high-vacuum case. The residual gas affects the beam trajectory greatly, but the magnetic field can focus the beam effectively. The final trajectory is determined by both effects. For a given magnetic field, in order to get the desired beam, the beam energy should be in a reasonable range.

关 键 词：电子束 传输特性 蒙特卡罗 

分 类 号：O532.26[理学—等离子体物理]