A way of increasing the transition radiation from a modulated electron beam in an inhomogeneous plasma

1989 ◽  
Vol 32 (8) ◽  
pp. 775-778 ◽  
Author(s):  
I. A. Anisimov ◽  
I. Yu. Kotlyarov ◽  
S. M. Levitskii
Keyword(s):  
Electron Beam ◽  
Transition Radiation ◽  
Inhomogeneous Plasma

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

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.

Spectrum of coherent transition radiation generated by a modulated electron beam

JETP Letters ◽  
2017 ◽  
Vol 106 (2) ◽  
pp. 127-130 ◽  
Author(s):  
G. A. Naumenko ◽  
A. P. Potylitsyn ◽  
P. V. Karataev ◽  
M. A. Shipulya ◽  
V. V. Bleko
Keyword(s):  
Electron Beam ◽  
Transition Radiation ◽  
Coherent Transition Radiation

Whistler emission through transition radiation by a modulated electron beam spiralling in a magnetoplasma

2000 ◽  
Vol 63 (3) ◽  
pp. 285-295 ◽  
Author(s):  
M. STARODUBTSEV ◽  
C. KRAFFT
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
External Magnetic Field ◽  
Transition Radiation ◽  
Physical Processes ◽  
Phase Velocities ◽  
Electric Dipoles ◽  
Wave Emission ◽  
Loop Antennas

Transition radiation from the zone of injection of a modulated electron beam spiralling into a magnetoplasma has been identified as whistler waves propagating quasiparallel to the external magnetic field. The characteristics of the radiation are similar to the emission by localized sources, such as loop antennas and electric dipoles: resonance-cone structures at low plasma densities and energy flow along the external magnetic field at higher densities, with a diverging radiation pattern and with whistler phase velocities inversely proportional to the plasma frequency. These studies should contribute to a wider understanding of the physical processes connected with the injection of charges in a magnetoplasma – either from a gun on board a spacecraft or in a plasma chamber – and thus allow the determination of appropriate radiator characteristics in order to control, to some extent, plasma perturbations and wave emission in the region of the injector.

Sign in / Sign up

Export Citation Format

Share Document