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
作者单位
1 中国科学院 电子学研究所, 高功率微波源与技术重点实验室, 北京 100190
2 中国科学院 研究生院, 北京 100039
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.
参考文献

[1] Pierce J R. Instability of hollow beams[J].IRE Trans on Electron Devices,1956:183-189.

[2] Sturrock P A. Magnetic deflection focusing[J].J Electron Control,1959,7:162-168.

[3] Booske J H, Basten M A, Kumbasar A H, et al. Periodic magnetic focusing of sheet electron beams[J].Phys Plasmas,1994,1(5):1714-1720.

[4] Booske J H, Brian D M, Thomas M A. Stability and confinement of nonrelativistic sheet electron beams with periodic cusped magnetic focusing[J].J Appl Phys,1993,73(9):4140-4155.

[5] Basten M A, Booske J H. Two-plane focusing of high-charge sheet electron beams using periodically cusped magnetic fields[J].J Appl Phys,1999,85(9):6313-6322.

[6] Basten M A, Booske J H, Anderson J, et al. Formation and transport of sheet electron beams and multi-beam configurations for high-power microwave devices[C]//Proc of SPIE.1995,2557:262-269.

[7] Carlsten B E, Earley F L, Krawczyk F L, et al. Stable two-plane focusing for emittance-dominated sheet-beam transport[J].Phys Rev ST Accel Beams,2005, 8(6):1-7.

[8] Booske J H, Basten M A. Demonstration via simulation of stable confinement of sheet electron beams using periodic magnetic focusing[J].IEEE Trans on Plasmas Science,1999,27(1):134-135.

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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