强激光与粒子束, 2004, 16 (4): 535, 网络出版: 2006-05-15
高功率离子束在偏压电荷收集器内部的电荷输运模拟
Simulation of HPIB propagation in biased charge collector
摘要
利用2.5维KARAT软件对高功率离子束在偏压电荷收集器内部的电荷输运过程进行PIC数值模拟,模拟结果表明在偏压电荷收集器内部电荷中和而电流不中和.在模拟中考虑了收集器的几何尺寸和离子束密度,因此模拟结果比一维数值计算的结果更为可靠.同时还模拟了偏置电压与电荷收集器离子收集效率之间的关系,对于峰值能量为500keV的高功率离子束,偏压为-800V即可满足测量要求,这一结果与实验吻合较好.
Abstract
A 2.5D PIC simulation using KARAT code for inner charge propagation within biased charge collector for measuring HPIB is presented.The simulation results indicate that the charges were neutralized but the current non-neutralized in the biased charge collector.The influence of ions collected vs biased voltage of the collector was also simulated.-800V biased voltage can meet the measurement of 500keV HPIB,and this is consistent with the experimental results.
李洪玉, 何小平, 孙剑锋, 杨海亮, 邱爱慈. 高功率离子束在偏压电荷收集器内部的电荷输运模拟[J]. 强激光与粒子束, 2004, 16(4): 535. LI Hong-yu, HE Xiao-ping, SUN Jian-feng, YANG Hai-liang, QIU Ai-ci. Simulation of HPIB propagation in biased charge collector[J]. High Power Laser and Particle Beams, 2004, 16(4): 535.
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