强流束在磁透镜中的传输模拟  

Simulation Analysis of Intense Beam Transmission in Magnetic Lens

作　　者：李超龙[1] 邱万英[1] 石海泉[1] 吕建钦[2] 

机构地区：[1]华东交通大学基础科学学院,江西南昌330013 [2]北京大学核物理与核技术国家重点实验室,北京100871

出　　处：《河北师范大学学报（自然科学版）》2013年第5期475-479,共5页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金(21063007);江西省科技支撑计划(2010BGB00602);江西省教育厅科学技术研究基金(GJJ11677);华东交通大学校立科研基金(10JC01)

摘　　要：由于强流束较强的空间电荷力,强流束传输一直是备受关注的问题.基于磁透镜的强流束传输、共轭梯度法和高斯-塞德尔迭代等理论,编写了磁透镜的束流传输模拟程序MAGLENS,适用于强流束在磁透镜中传输的模拟计算.在不同束流流强条件下,用MAGLENS与其他程序进行了模拟计算,并对模拟结果进行了比较分析.模拟结果表明:束流越强,空间电荷力越大,束流包络发散越明显,非自洽解与自洽解的偏离越显著.Due to strong space-charge force of intense beam,intense beam transmission has been a issue that received more concerns all the time. Based on theory of intense beam transmission in magnetic lens, conjugate gradient method and Gauss-Seidel iteration,a computer simulation code MAGLENS was developed to calculate intense beam transmission in magnetic lens. MAGLENS and other codes were used to simulate different current beam transmission in magnetic lens, and the simulation results were compared and analyzed. The simulation results indicate that space-charge force increases with the rise of beam current,and the stronger beam current causes more apparent beam-envelope-lateral-divergence and the larger deviation between non-self-consistent solutions and self-consistent solutions.

关 键 词：强流束 磁透镜 共轭梯度法 高斯-塞德尔迭代 空间电荷力 

分 类 号：O463[机械工程—光学工程] O242.1[理学—电子物理学]