Propagation of electron beam in inhomogeneous plasma

2002 ◽  
Author(s):  
E. Kontar ◽  
V. Lapshin ◽  
V. Mel'nik
Keyword(s):  
Electron Beam ◽  
Inhomogeneous Plasma

scholarly journals Electron beam relaxation in inhomogeneous plasmas

2013 ◽  
Vol 31 (8) ◽  
pp. 1379-1385 ◽  
Author(s):  
A. Voshchepynets ◽  
V. Krasnoselskikh
Keyword(s):  
Electron Beam ◽  
Beam Energy ◽  
Electron Beams ◽  
Inhomogeneous Plasma ◽  
Density Fluctuations ◽  
Langmuir Waves ◽  
Wave Trapping ◽  
Beam Plasma ◽  
Beam Plasma Instability ◽  
Accelerated Particles

Abstract. In this work, we studied the effects of background plasma density fluctuations on the relaxation of electron beams. For the study, we assumed that the level of fluctuations was so high that the majority of Langmuir waves generated as a result of beam-plasma instability were trapped inside density depletions. The system can be considered as a good model for describing beam-plasma interactions in the solar wind. Here we show that due to the effect of wave trapping, beam relaxation slows significantly. As a result, the length of relaxation for the electron beam in such an inhomogeneous plasma is much longer than in a homogeneous plasma. Additionally, for sufficiently narrow beams, the process of relaxation is accompanied by transformation of significant part of the beam kinetic energy to energy of accelerated particles. They form the tail of the distribution and can carry up to 50% of the initial beam energy flux.

Transition radiation of modulated electron beam in strongly inhomogeneous plasma

1994 ◽  
Vol 37 (2) ◽  
pp. 112-115
Author(s):  
I. A. Anisimov ◽  
A. A. Zubarev ◽  
I. Yu. Kotlyarov ◽  
S. M. Levitskii
Keyword(s):  
Electron Beam ◽  
Transition Radiation ◽  
Inhomogeneous Plasma

Interaction of a relativistic electron beam with an inhomogeneous plasma

1968 ◽  
Vol 2 (4) ◽  
pp. 557-580 ◽  
Author(s):  
G. Dorman
Keyword(s):  
Growth Rate ◽  
Electron Beam ◽  
Relativistic Electron ◽  
Relativistic Electron Beam ◽  
Inhomogeneous Plasma ◽  
Plasma Temperature ◽  
Transverse Mode ◽  
Longitudinal Modes ◽  
Frequency Interaction ◽  
Plasma Nonuniformity

The investigation of the high-frequency interaction of a relativistic electron beam and a plasma is extended to include arbitrary variation of the plasma density. Analysing the coupled linearized Vlasov—Maxwell equations by means of a low-temperature expansion of the orbit integrals, a general equation for the electric field accurate to first order in the plasma temperature, beam temperature, and betatron frequency is obtained. This equation is applied to the investigations of transverse and longitudinal modes. A new transverse mode with |ω − kV0| ∼ ωβ is found to be collisionally unstable. The electrostatic instability is found to be slowed down by both low plasma temperature and low beam temperature, but the betatron oscillations increase the growth rate. A new longitidinal mode with |ω − kV0| ∼ ωβ, is found to be unstable for nonzero beam temperatures. The lowest order correction to the electrostatic growth rate due to a small plasma nonuniformity is obtained. The sign of this correction is found to depend critically on the shape of the inhomogeneity.

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