Absorption and emission of electron cyclotron waves in plasmas with electron momentum anisotropies both along and across the external magnetic field

1990 ◽  
Vol 12 (11) ◽  
pp. 1575-1584 ◽  
Author(s):  
A. Orefice
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Electron Cyclotron ◽  
Electron Momentum ◽  
Absorption And Emission ◽  
Electron Cyclotron Waves

Relativistic theory of absorption and emission of electron cyclotron waves in anisotropic plasmas

1988 ◽  
Vol 39 (1) ◽  
pp. 61-70 ◽  
Author(s):  
A. Orefice
Keyword(s):  
Relativistic Theory ◽  
Electron Distribution ◽  
Electron Distribution Function ◽  
Distribution Functions ◽  
Electron Cyclotron ◽  
Loss Cone ◽  
Absorption And Emission ◽  
Electron Cyclotron Waves ◽  
Plasma Dispersion ◽  
Weakly Relativistic Plasma

The weakly relativistic theory of absorption and emission of electron cyclotron waves in hot magnetized plasmas is developed for a large class of anisotropic electron distribution functions. The results are expressed in terms of the weakly relativistic plasma dispersion functions, and therefore of the well-known plasma Z-function. The particular case of a loss-cone electron distribution function is presented as a simple example.

Electron-cyclotron absorption by inhomogeneous current-carrying plasmas

1994 ◽  
Vol 52 (2) ◽  
pp. 195-214 ◽  
Author(s):  
C. J. H. Cavalcanti ◽  
R. S. Schneider ◽  
L. F. Ziebell
Keyword(s):  
Magnetic Field ◽  
High Frequency ◽  
Electromagnetic Waves ◽  
Electron Cyclotron ◽  
Wave Frequency ◽  
Cyclotron Absorption ◽  
Homogeneous Background ◽  
Electron Cyclotron Waves ◽  
The Magnetic Field

We consider effects of inhomogeneity on the absorption of high-frequency electromagnetic waves, propagating at arbitrary angles relative to the magnetic field, by current-carrying plasmas. An inhomogeneous current is assumed to be immersed in an otherwise homogeneous background, and the absorption of fundamental electron-cyclotron waves is discussed, with emphasis on the dependence of the inhomogeneity effect on wave frequency and angle of propagation.

ELECTROMAGNETIC ELECTRON-CYCLOTRON WAVES WITH AC FIELD IN THE MAGNETOSPHERE

2014 ◽  
Vol 5 (2) ◽  
pp. 757-766 ◽  
Author(s):  
Rajbir Kaur ◽  
R.S. Pandey ◽  
S. Kumar ◽  
B.S. Tomar
Keyword(s):  
Magnetic Field ◽  
Growth Rate ◽  
Electron Cyclotron ◽  
Field Direction ◽  
Magnetic Field Direction ◽  
Number Density ◽  
Temperature Anisotropy ◽  
Ac Field ◽  
Electron Cyclotron Waves ◽  
Kappa Distribution Function

In this paper the effect of externally injected beam of cold electrons on electromagnetic electron-cyclotron (EMEC) waves in the magnetosphere has been discussed. The investigation is conducted using the methodology of characteristic solution and considering kappa distribution function in the presence of AC field.  The objective of present study is to examine the variation in growth rate of EMEC waves when temperature anisotropy, magnitude of AC field and number density of energetic particles varies. It is inferred that EMEC waves grow more significantly when propagating oblique to magnetic field direction rather than parallel to magnetic field direction. Also that as the temperature anisotropy and number density of background plasma increases, growth rate of EMEC waves increases.

scholarly journals Dark and grey electromagnetic electron-cyclotron envelope solitons in an electron-positron magnetoplasma

2009 ◽  
Vol 75 (5) ◽  
pp. 575-580 ◽  
Author(s):  
P. K. SHUKLA ◽  
R. BINGHAM ◽  
A. D. R. PHELPS ◽  
L. STENFLO
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Wave ◽  
External Magnetic Field ◽  
Wave Packet ◽  
Electron Cyclotron ◽  
Envelope Soliton ◽  
Circularly Polarized ◽  
Envelope Solitons ◽  
Electron Positron ◽  
Cubic Nonlinear Schrödinger Equation

AbstractWe present an investigation of the amplitude modulation of an external magnetic field-aligned right-hand circularly polarized electromagnetic electron-cyclotron (EMEC) wave in a strongly magnetized electron-positron plasma. It is shown that the dynamics of the modulated EMEC wave packet is governed by a cubic nonlinear Schrödinger equation. The latter reveals that a modulated wave packet can propagate in the form of either a dark or a grey envelope soliton. This result could have relevance to the transport of electromagnetic wave energy over long distances via envelope solitons in the magnetospheres of pulsars and magnetars.

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