Nonlinear theory of the excitation of azimuthal surface waves during dissipative instability

被引:8
作者
Girka, VO [1 ]
Kondratenko, AN [1 ]
Puzyr'kov, SY [1 ]
机构
[1] Kharkov Natl Univ, UA-61077 Kharkov, Ukraine
关键词
D O I
10.1134/1.1545586
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
A theoretical study is made of the surface electromagnetic eigenmodes that are excited by an annular charged-particle beam due to dissipative instability and propagate across the external axial magnetic field in a cylindrical metal waveguide partially filled with plasma. A self-consistent set of differential equations for a cold low-density charged-particle beam moving above the plasma surface is constructed in the single-mode approximation and is solved numerically. It is shown that the larger the dissipation, the slower the instability growth rate and the larger the wave amplitude in the saturation stage of the instability. An increase in the transverse dimensions of a charged-particle beam results in a slower growth of the dissipative instability, in which case, however, the beam transfers a larger fraction of its kinetic energy to the wave. (C) 2003 MAIK "Nauka/Interperiodica".
引用
收藏
页码:112 / 117
页数:6
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