Landau damping in a bounded magnetized plasma column

doi:10.1088/1674-1056/24/2/025201

›› 2015, Vol. 24 ›› Issue (2): 25201-025201.doi: 10.1088/1674-1056/24/2/025201

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇下一篇

Landau damping in a bounded magnetized plasma column

H. Zakeri-Khatir, F. M. Aghamir

Department of Physics, University of Tehran, Tehran 14399, Iran

收稿日期:2014-06-06 修回日期:2014-09-01 出版日期:2015-02-05 发布日期:2015-02-05

Landau damping in a bounded magnetized plasma column

H. Zakeri-Khatir, F. M. Aghamir

Department of Physics, University of Tehran, Tehran 14399, Iran

Received:2014-06-06 Revised:2014-09-01 Online:2015-02-05 Published:2015-02-05
Contact: F. M. Aghamir E-mail:aghamir@ut.ac.ir

摘要/Abstract

摘要： The damping decrement of Landau damping and the effect of thermal velocity on the frequency spectrum of a propagating wave in a bounded plasma column are investigated. The magnetized plasma column partially filling a cylindrical metallic tube is considered to be collisionless and non-degenerate. The Landau damping is due to the thermal motion of charge carriers and appears whenever the phase velocity of the plasma waves exceeds the thermal velocity of carriers. The analysis is based on a self-consistent kinetic theory and the solutions of the wave equation in a cylindrical plasma waveguide are presented using Vlasov and Maxwell equations. The hybrid mode dispersion equation for the cylindrical plasma waveguide is obtained through the application of appropriate boundary conditions to the plasma-vacuum interface. The dependence of Landau damping on plasma parameters and the effects of the metallic tube boundary on the dispersion characteristics of plasma and waveguide modes are investigated in detail through numerical calculations.

关键词: Landau damping, cylindrical plasma waveguide, Vlasov equation, dispersion characteristic

Abstract: The damping decrement of Landau damping and the effect of thermal velocity on the frequency spectrum of a propagating wave in a bounded plasma column are investigated. The magnetized plasma column partially filling a cylindrical metallic tube is considered to be collisionless and non-degenerate. The Landau damping is due to the thermal motion of charge carriers and appears whenever the phase velocity of the plasma waves exceeds the thermal velocity of carriers. The analysis is based on a self-consistent kinetic theory and the solutions of the wave equation in a cylindrical plasma waveguide are presented using Vlasov and Maxwell equations. The hybrid mode dispersion equation for the cylindrical plasma waveguide is obtained through the application of appropriate boundary conditions to the plasma-vacuum interface. The dependence of Landau damping on plasma parameters and the effects of the metallic tube boundary on the dispersion characteristics of plasma and waveguide modes are investigated in detail through numerical calculations.

Key words: Landau damping, cylindrical plasma waveguide, Vlasov equation, dispersion characteristic

中图分类号: (Magnetized plasmas)

52.25.Xz

52.25.Dg (Plasma kinetic equations) 52.35.-g (Waves, oscillations, and instabilities in plasmas and intense beams) 52.25.Mq (Dielectric properties)

H. Zakeri-Khatir, F. M. Aghamir. Landau damping in a bounded magnetized plasma column[J]. , 2015, 24(2): 25201-025201.

H. Zakeri-Khatir, F. M. Aghamir. Landau damping in a bounded magnetized plasma column[J]. Chin. Phys. B, 2015, 24(2): 25201-025201.

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Landau damping in a bounded magnetized plasma column

Landau damping in a bounded magnetized plasma column

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