Eigenmode description of the hot ion cyclotron beam-whistler mode instability in parallel shock waves

1977 ◽  
Vol 20 (10) ◽  
pp. 1758 ◽  
Author(s):  
K. I. Golden ◽  
Liu Chen ◽  
J. W. Cipolla ◽  
M. B. Silevitch
Keyword(s):  
Shock Waves ◽  
Mode Instability ◽  
Whistler Mode ◽  
Ion Cyclotron

Electron whistler mode instability in an inhomogeneous thermal plasma in the presence of an inhomogeneous beam of suprathermal electrons

1983 ◽  
Vol 29 (3) ◽  
pp. 439-448 ◽  
Author(s):  
H.A. Shah ◽  
V.K. Jain
Keyword(s):  
Magnetic Field ◽  
Growth Rate ◽  
Dispersion Relation ◽  
Thermal Plasma ◽  
Uniform Magnetic Field ◽  
Inhomogeneous Plasma ◽  
Mode Instability ◽  
Whistler Mode ◽  
Suprathermal Electrons ◽  
Whistler Mode Waves

The excitation of the whistler mode waves propagating obliquely to the constant and uniform magnetic field in a warm and inhomogeneous plasma in the presence of an inhomogeneous beam of suprathermal electrons is studied. The full dispersion relation including electromagnetic effects is derived. In the electrostatic limit the expression for the growth rate is given. It is found that the inhomogeneities in both beam and plasma number densities affect the growth rates of the instabilities.

Nonlinear development and Fourier analysis of the whistler mode instability

1973 ◽  
Vol 9 (3) ◽  
pp. 295-310 ◽  
Author(s):  
S. Cuperman ◽  
Y. Salu
Keyword(s):  
Stability Analysis ◽  
Fourier Analysis ◽  
Linear Stability ◽  
Linear Stability Analysis ◽  
Wave Spectrum ◽  
Equatorial Region ◽  
Anisotropy Ratio ◽  
Mode Instability ◽  
Whistler Mode ◽  
The Waves

The results of the nonlinear computer investigationof the whistler mode instability with the aid of particle-in-cell simulation methods are presented. The electron plasma considered is hot (kT‖ = 20 keV), anisothermal (T⊥/T‖ ≃ 2) and embedded in a static magnetic field such that β‖ = 0.8. A detailed Fourier analysis of the electromagnetic activity developed under the above stated conditions is carried out: the waves are shown to be electron-like and excellent agreement with the linear stability analysis for the first stages of evolution is found. The feed-back effect of the waves on the particles is shown to result in a continuous decrease of the thermal anisotropy ratio T⊥/T‖ corresponding changes in the Fourier spectra of the electromagnetic activity are observed; additional changes in the wave spectrum are introduced by the interaction between various instability modes. At the end of the run (ωpt ⋍600), the state of the system resembles a quasi-stable equilibrium, in which the electromagnetic energy achieves its maximum value: in this state, unlike the equilibrium one usually considered in the linear stability analysis, a thermally anisotropic plasma with T⊥/T‖⋍1·35 appears to be quasi-stable against the whistler mode instability. This last result is relevant for the geostationary magnetospheric conditions (in the equatorial region) where quasi-stationary states with T⊥/T‖ about 1·3 are observed.

Excitation of whistler mode instability due to slow cyclotron interaction in an inhomogenous beam–plasma System

1984 ◽  
Vol 31 (2) ◽  
pp. 225-229 ◽  
Author(s):  
H. A. Shah ◽  
V. K. Jain
Keyword(s):  
Growth Rate ◽  
Inhomogeneous Plasma ◽  
Whistler Wave ◽  
Wave Instability ◽  
Mode Instability ◽  
Plasma System ◽  
Whistler Mode ◽  
Beam Plasma ◽  
Slow Cyclotron ◽  
Dielectric Tensors

The excitation of whistler wave instability due to slow cyclotron (m = – 1) interaction in an inhomogeneous plasma penetrated by an inhomogeneous beam of electrons is studied. Expressions are obtained for the elements of the plasma and beam dielectric tensors. It is shown that the inhomogeneity in both beam and plasma number densities affects the growth rate of the instability.

Propagation of whistler mode ion-cyclotron wave through multicomponent plasma

1996 ◽  
Vol 75 (2) ◽  
pp. 77-85
Author(s):  
D. K. Singh ◽  
D. Narayan ◽  
R. P. Singh
Keyword(s):  
Whistler Mode ◽  
Multicomponent Plasma ◽  
Ion Cyclotron

Some comments on the whistler mode instability at Jupiter

1976 ◽  
Vol 81 (10) ◽  
pp. 1787-1790 ◽  
Author(s):  
F. L. Scarf ◽  
N. L. Sanders
Keyword(s):  
Mode Instability ◽  
Whistler Mode
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