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线极化波对带电粒子的加速机制

王志国 周小文 刘超超 许琛 贾立颖 王倩 黄可淼 赵欣 刘荣明 李炳山

王志国, 周小文, 刘超超, 等. 线极化波对带电粒子的加速机制[J]. 强激光与粒子束, 2019, 31: 014001. doi: 10.11884/HPLPB201931.180188
引用本文: 王志国, 周小文, 刘超超, 等. 线极化波对带电粒子的加速机制[J]. 强激光与粒子束, 2019, 31: 014001. doi: 10.11884/HPLPB201931.180188
Wang Zhiguo, Zhou Xiaowen, Liu Chaochao, et al. Charged particles acceleration by linearly polarized electromagnetic wave in medium with tapered refractive index[J]. High Power Laser and Particle Beams, 2019, 31: 014001. doi: 10.11884/HPLPB201931.180188
Citation: Wang Zhiguo, Zhou Xiaowen, Liu Chaochao, et al. Charged particles acceleration by linearly polarized electromagnetic wave in medium with tapered refractive index[J]. High Power Laser and Particle Beams, 2019, 31: 014001. doi: 10.11884/HPLPB201931.180188

线极化波对带电粒子的加速机制

doi: 10.11884/HPLPB201931.180188
基金项目: 

北京矿冶科技集团青年基金项目 QCJ201829

国家自然科学基金项目 11575015

详细信息
    作者简介:

    王志国(1990—), 男,硕士,主要从事电磁极化波带电粒子加速原理的研究; wangzg@magmat.com

    通讯作者:

    刘荣明(1982—),男,博士,主要从事带电粒子加速原理的研究; liurongming@magmat.com

  • 中图分类号: O411.4

Charged particles acceleration by linearly polarized electromagnetic wave in medium with tapered refractive index

  • 摘要: 讨论了线极化波对带电粒子三种加速机制:(1)介质折射率递减但外加磁场保持不变;(2)介质折射率不变但外加磁场递增;(3)介质折射率递减且外加磁场递增。结果显示,在一定的加速距离内,按照机制(3)利用LPEMW加速电子的效率最高。另外,机制(3)可以避免机制(2)中电子在加速过程中回飞的问题,这一点在利用线极化波(LPEMW)加速电子束或带电粒子束时非常重要。
  • 图  1  在固定外磁场中,对于不同的α值,相对论因子γ关于z的变化曲线

    Figure  1.  Relativistic factor γ as a function of z for different α values in the case of a fixed external magnetic field

    图  2  在均匀介质中,不同的β值时相对论因子γ与距离z的变化曲线

    Figure  2.  Relativistic factor γ as a function of z for different β values in the homogeneous refractive medium

    图  3  在均匀介质中,不同的β值时电子运动距离z与时间t的函数关系

    Figure  3.  Electron travel distance in z direction as a function of time t for different β values in case of a constant refractive index

    图  4  三种加速机制下的线极化波对电子加速的相对论因子γ与距离z的函数关系

    Figure  4.  Relativistic factor γ as a function of z for electron acceleration by the linearly polarized EMW for three cases: VRIS, VEMFS and their combination (i.e., VRIEMFS)

    图  5  在变化的介质中,沿增大的外加磁场方向传播的线极化波对带电粒子加速的粒子在z=0.1 m处相对论因子γB0的关系

    Figure  5.  Values of γ reached at z=0.1 m as a function of B0 for charged particles acceleration by the linearly polarized EMW along an increasing external magnetic field in a medium with a tapered refractive index

    图  6  三种机制下粒子回旋半径R与距离z的关系

    Figure  6.  Cyclotron radius R=(x2+y2)1/2 as a function of z for the three acceleration mechanisms

    图  7  VRIEMFS机制下,电子初速度v0不同时,相对论因子γz的变化曲线

    Figure  7.  Relativistic factor γ as a function of z for different v0 in case of VRIEMFS

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出版历程
  • 收稿日期:  2018-07-06
  • 修回日期:  2018-12-20
  • 刊出日期:  2019-01-15

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