The Electromagnetic Slow-Wave Characteristics in the Beam-Ion Channel System

WANG Bin; HAO Bao-liang; LIU Pu-kun; TANG Chang-jian

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The Electromagnetic Slow-Wave Characteristics in the Beam-Ion Channel System

更新时间：2025-07-16

- The Electromagnetic Slow-Wave Characteristics in the Beam-Ion Channel System
- Acta Electronica Sinica Vol. 36, Issue 6, Pages: 1074-1077(2008)
- 作者机构：
  
  1. 四川大学物理科学与技术学院,四川,成都,610065
  2. 中国科学院电子学研究所,北京,100800
  3. 四川大学物理科学与技术学院四川成都,610065
  4. 中国科学院电子学研究所北京,100800
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN128
- Published：2008
- 稿件说明：
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WANG Bin, HAO Bao-liang, LIU Pu-kun, et al. The Electromagnetic Slow-Wave Characteristics in the Beam-Ion Channel System[J]. Acta Electronica Sinica, 2008, 36(6): 1074-1077.
DOI：

WANG Bin, HAO Bao-liang, LIU Pu-kun, et al. The Electromagnetic Slow-Wave Characteristics in the Beam-Ion Channel System[J]. Acta Electronica Sinica, 2008, 36(6): 1074-1077. DOI：

摘要

利用荷流体线性微扰理论分析了无外加磁场时相对论电子束在离子通道中的三维扰动效应

导出了系统的等效介电率张量.对电磁波沿轴向传播的情况进行了详细研究和数值模拟计算

得到了系统的色散关系.结果表明

此系统存在电磁慢波的传输特性.电磁波与电子的Betatron振荡相互耦合

可能是该系统出现电磁辐射的物理原因.研究结果也旁证了:由此系统电磁不稳定性所带来的电磁辐射

在一定条件下可能是切连科夫辐射.

Abstract

The three-dimensional perturbation effect of relativistic electron beam in ion-channel is analyzed by use of the charge fluid linear perturbation theory without extra magnetic field.The equivalent dielectric tensor of the system is derived.Particular research and numerical calculation for propagating axial electromagnetic wave are presented.The dispersion relation of the system is obtained.It is clearly shown that the electromagnetic slow-wave characteristics exist in the system.The electromagnetic radiation may result from the coupling of microwave mode to electronic Betatron motion.Finally

the research result gives a circumstantial evidence that the electromagnetic radiation

which brought from the electromagnetic instability in the system

might be Cherenkov radiation under a certain condition.

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