Surface waves on the boundary of a conducting medium and their excitation by a relativistic electron beam

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作者
A. V. Kukushkin
A. A. Rukhadze
机构
[1] Nizhny Novgorod State Technical University,Prokhorov General Physics Institute
[2] Russian Academy of Sciences,undefined
[3] Moscow Institute of Physics and Technology,undefined
来源
Plasma Physics Reports | 2017年 / 43卷
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摘要
Excitation of surface waves by a relativistic electron beam propagating over a conducting cylindrical medium (metal or highly ionized plasma) is investigated theoretically. Dispersion relations describing the linear interaction of surface electromagnetic waves with a monoenergetic electron beam are derived, and the growth rates and spatial amplification factors of excited waves are determined. Condition for the nonlinear trapping of the beam electrons by a surface wave is used to determine the maximum amplitude of the excited wave and the optimal radiator length. The electric field of a surface wave excited by an electron beam is estimated for a particular case.
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页码:937 / 942
页数:5
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