强激光与粒子束, 2010, 22 (12): 2935, 网络出版: 2011-01-05
带状电子注的聚焦和传输
Focusing and transport of sheet electron beams
带状电子注 单粒子模型 周期会切磁场 双平面聚焦 边缘聚焦 稳定传输 sheet electron beam single-particle model periodically cusped magnetic fields two-plane focusing edge focusing stable transport
摘要
采用单粒子模型, 对有限宽矩形带状电子注在周期会切磁场(PCM)、带偏移磁极的周期会切磁场(offset-pole PCM)和周期会切周期四极磁铁混合磁场(PCM-PQM)聚焦结构中传输的双平面聚焦, 进行了详细的理论和数值分析研究。结果表明:PCM和offset-pole PCM聚焦结构对于实现带状电子注的双平面边缘聚焦比较困难, 原因在于它们无法独立控制电子注水平和垂直两个方向的聚焦。PCM-PQM聚焦结构则非常有效地改善了聚焦, 可以很好地实现带状电子注边缘的聚焦和均匀稳定的传输。
Abstract
Sheet electron beams can transport stably in periodically cusped magnetic fields(PCMs). Two-plane focusing and edge focusing of the sheet beams with rectangular cross section of finite width are investigated using single-particle model. Theoretical and numerical analyses show that offset-pole PCM configuration is effective in edge focusing, while both PCM and offset-pole PCM configurations are incapable of two-plane edge focusing. The PCM-PQM(periodic quadrupole magnetic field) configuration has inherent advantages for independent adjustment of edge fields so that two-plane focusing and edge focusing can be accomplished in both transverse dimensions.
韩莹, 阮存军, 王勇, 赵鼎. 带状电子注的聚焦和传输[J]. 强激光与粒子束, 2010, 22(12): 2935. Han Ying, Ruan Cunjun, Wang Yong, Zhao Ding. Focusing and transport of sheet electron beams[J]. High Power Laser and Particle Beams, 2010, 22(12): 2935.
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