| 电子注对谐振腔中TM模式谐振频率和电磁场分布的影响 |
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| 引用本文： | 林福民,张华福,马晓兰.电子注对谐振腔中TM模式谐振频率和电磁场分布的影响[J].强激光与粒子束,2013,25(7):1763-1769. |
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| 作者姓名： | 林福民 张华福 马晓兰 |
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| 作者单位： | 1.广东工业大学 物理与光电工程学院, 广州 51 0006; |
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| 摘 要： | 将电子注视为等离子体柱，从填充等离子体柱的谐振腔的物理模型出发，推导了圆柱腔填充中心电子注时TM0m0模式的特征方程，并重点分析了填充电子注的圆柱腔中TM010模式和TM020模式的谐振频率和电磁场分布随等离子频率的变化情况。研究结果表明，随着电子注的等离子体频率不断增大，谐振频率也不断增大，谐振腔内电场和磁场的分布也随之发生改变。当电子注的等离子体频率超过谐振腔的谐振频率时，谐振腔内的电磁场分布将发生很大的变化，出现了电子注内外电场方向相反和趋肤效应等现象。
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| 关 键 词： | 谐振腔 电子注 等离子体 等离子频率 谐振模式 |
| 收稿时间： | 2012-12-11; |
Influences of electron beam on resonant frequency and electromagnetic field distribution of TM modes in a cavity |
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| Lin Fumin,Zhang Huafu,Ma Xiaolan.Influences of electron beam on resonant frequency and electromagnetic field distribution of TM modes in a cavity[J].High Power Laser and Particle Beams,2013,25(7):1763-1769. |
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| Authors: | Lin Fumin Zhang Huafu Ma Xiaolan |
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| Affiliation: | 1.School of Physics and Optoelectronic Engineering,Guangdong University of Technology,Guangzhou 510006,China;2.Department of Physics,Jinan University,Guangzhou 510632,China |
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| Abstract: | An electron beam was regarded as a plasma column, and the eigen frequency equations of the TM0m0 mode of a cylindrical cavity filled with a plasma column in the center are deduced based on the analytic method in this paper. It is studied in detail that the resonant frequency and the electromagnetic field distribution of the TM010 mode and the TM020 mode changes with the plasma frequency of the electron beam. The research results show that the resonant frequency of the TM010 mode and the TM020 mode will increase with the increasing of the plasma frequency of the electron beam, and the distribution of the electromagnetic fields also changes. When the electron beam’s plasma frequency exceeds the resonant frequency of the cavity, the electromagnetic field distribution of the TM010 mode and the TM020 mode in the cylindrical cavity will change greatly, and some peculiar phenomena will appear, such as the electric field inside the electron beam will be in the opposite direction of the electric field outside the electron beam, the electromagnetic field will be converged on the brim of the electron beam, and so on. |
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| Keywords: | electron beam plasma plasma frequency resonant mode |
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