Effects of a cold electron beam on the parametric decay of a Langmuir wave

1984 ◽  
Vol 56 (11) ◽  
pp. 3132-3136 ◽  
Author(s):  
Joseph E. Willett ◽  
Yildirim Aktas
Keyword(s):  
Electron Beam ◽  
Langmuir Wave ◽  
Cold Electron ◽  
Parametric Decay

scholarly journals Compton and Raman free electron laser stability properties for a cold electron beam propagating through a helical magnetic wiggler

1985 ◽  
Vol 33 (3) ◽  
pp. 387-423 ◽  
Author(s):  
John A. Davies ◽  
Ronald C. Davidson ◽  
George L. Johnston
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
Dispersion Relation ◽  
Free Electron ◽  
Free Electron Laser ◽  
Relativistic Electron Beam ◽  
Cold Electron ◽  
Wiggler Magnetic Field ◽  
Laser Stability

This paper gives an extensive characterization of the range of validity of the Compton and Raman approximations to the exact free electron laser dispersion relation for a cold, relativistic electron beam propagating through a constantamplitude helical wiggler magnetic field. The electron beam is treated as infinite in transverse extent. Specific properties of the exact and approximate dispersion relations are investigated analytically and numerically. In particular, a detailed numerical analysis is carried out to determine the range of validity of the Compton approximation.

scholarly journals Electron acoustic solitons in the Earth's magnetotail

2004 ◽  
Vol 11 (2) ◽  
pp. 215-218 ◽  
Author(s):  
S. G. Tagare ◽  
S. V. Singh ◽  
R. V. Reddy ◽  
G. S. Lakhina
Keyword(s):  
Electron Beam ◽  
Small Amplitude ◽  
Low Frequency ◽  
Frequency Component ◽  
Magnetized Plasma ◽  
Cold Electron ◽  
Ion Plasma ◽  
Electron Acoustic ◽  
Two Temperature ◽  
Perpendicular Polarization

Abstract. Small amplitude electron - acoustic solitons are studied in a magnetized plasma consisting of two types of electrons, namely cold electron beam and background plasma electrons and two temperature ion plasma. The analysis predicts rarefactive solitons. The model may provide a possible explanation for the perpendicular polarization of the low-frequency component of the broadband electrostatic noise observed in the Earth's magnetotail.

scholarly journals Dependence of Langmuir wave polarization on electron beam speed in type III solar radio bursts

2011 ◽  
Vol 38 (13) ◽  
pp. n/a-n/a ◽  
Author(s):  
David M. Malaspina ◽  
Iver H. Cairns ◽  
Robert E. Ergun
Keyword(s):  
Electron Beam ◽  
Solar Radio ◽  
Langmuir Wave ◽  
Radio Bursts ◽  
Wave Polarization ◽  
Solar Radio Bursts ◽  
Type Iii

Excitation of lower hybrid waves by electron beams in finite geometry plasmas. Part 1. Body waves

1978 ◽  
Vol 19 (2) ◽  
pp. 281-294 ◽  
Author(s):  
Magdi M. Shoucri ◽  
Réal R. J. Gagné
Keyword(s):  
Electron Beam ◽  
Electron Beams ◽  
Finite Geometry ◽  
Body Waves ◽  
Lower Hybrid ◽  
Hot Electron ◽  
Cold Electron ◽  
Small Density ◽  
Hybrid Waves ◽  
Lower Hybrid Waves

The quasi-static lower hybrid eigenmodes of a plasma column in a cylindrical waveguide are determined, and their linear excitation by a small density electron beam is discussed for the cases of a hot electron beam as well as for a cold electron beam. It is shown that under certain conditions, finite geometry effects introduce important quantitative and qualitative differences with respect to the results obtained in an infinite geometry.

COLD BEAM INJECTION IN RELATIVISTIC EMEC WAVE FOR KAPPA DISTRIBUTION FUNCTION WITH AC FIELD FOR MAGNETO-PLASMA

2015 ◽  
Vol 7 (1) ◽  
pp. 1371-1379
Author(s):  
Rajbir Kaur ◽  
R.S. Pandey ◽  
K.M. Singh ◽  
B.N. Singh ◽  
Vijay Prasad
Keyword(s):  
Growth Rate ◽  
Electron Beam ◽  
Wide Frequency Range ◽  
Relativistic Plasma ◽  
Relativistic Electrons ◽  
Kappa Distribution ◽  
Wave Band ◽  
Cold Electron ◽  
Frequency Range ◽  
Kappa Distribution Function

The effect of cold electron beam on electromagnetic electron cyclotron (EMEC) wave has been studied by using the unperturbed Lorentzian (Kappa) distribution in the magnetosphere for relativistic plasma. The dispersion relation is obtained by using the method of characteristic solutions and kinetic approach. An expression for the growth rate of a system has been calculated. It is inferred that in addition to the relativistic plasma obliquity and effect of cold electron beam modifies the growth rate and it also shifts the wave band significantly. The relativistic electrons by increasing the growth rate and widening the bandwidth may explain a wide frequency range of EMEC wave emissions in the magnetosphere.

Sign in / Sign up

Export Citation Format

Share Document