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Title: Electromagnetic waves in a relativistic plasma with a strong magnetic field

Abstract

The dispersion characteristics of electromagnetic waves in a relativistic plasma having a one-dimensional distribution function established through radiation losses in a strong magnetic field are studied. It is shown that the longitudinal waves in such a plasma exist in a certain frequency interval near the plasma frequency, they propagate at small angles to the external magnetic field, and their phase velocities exceed the velocity of light, as a consequence of which the longitudinal waves do not have clear advantages over other types of waves in terms of generation (their ''Cherenkov'' generation is impossible). The dispersion properties of the electromagnetic waves in the low-frequency intervals of ..omega../sub Hi/ less than ..omega.. less than ..omega../sub He/ and ..omega.. much less than ..omega../sub Hi/ in the ''quasivacuum'' approximation (parallel bar n/sup 2/ -- 1 parallel bar much less than 1) are analogous to the properties of normal waves in a cold plasma in the corresponding frequency intervals. A distinguishing feature of a relativistic plasma is the attenuation of the waves caused by the presence in it of a continuous spectrum of gyrofrequencies and strong spatial dispersion. The instability increments of Alfven and fast magnetosonic waves, connected with the one-dimensionality of the distribution function,more » are found for quasilongitudinal propagation.« less

Authors:
;
Publication Date:
Research Org.:
Scientific-Research Inst. of Radiophysics, Gorky, USSR
OSTI Identifier:
7130075
Resource Type:
Journal Article
Journal Name:
Astrophysics (Engl. Transl.); (United States)
Additional Journal Information:
Journal Volume: 11:2; Other Information: Translated from Astrofizika; 11: No. 2, 305-318(1975)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; RELATIVISTIC PLASMA; ELECTROMAGNETIC RADIATION; ALFVEN WAVES; DISPERSION RELATIONS; DISTRIBUTION FUNCTIONS; MAGNETIC FIELDS; MAGNETOACOUSTIC WAVES; HYDROMAGNETIC WAVES; PLASMA; RADIATIONS; 700108* - Fusion Energy- Plasma Research- Wave Phenomena

Citation Formats

Suvorov, E V, and Chugunov, Yu V. Electromagnetic waves in a relativistic plasma with a strong magnetic field. United States: N. p., 1975. Web.
Suvorov, E V, & Chugunov, Yu V. Electromagnetic waves in a relativistic plasma with a strong magnetic field. United States.
Suvorov, E V, and Chugunov, Yu V. Wed . "Electromagnetic waves in a relativistic plasma with a strong magnetic field". United States.
@article{osti_7130075,
title = {Electromagnetic waves in a relativistic plasma with a strong magnetic field},
author = {Suvorov, E V and Chugunov, Yu V},
abstractNote = {The dispersion characteristics of electromagnetic waves in a relativistic plasma having a one-dimensional distribution function established through radiation losses in a strong magnetic field are studied. It is shown that the longitudinal waves in such a plasma exist in a certain frequency interval near the plasma frequency, they propagate at small angles to the external magnetic field, and their phase velocities exceed the velocity of light, as a consequence of which the longitudinal waves do not have clear advantages over other types of waves in terms of generation (their ''Cherenkov'' generation is impossible). The dispersion properties of the electromagnetic waves in the low-frequency intervals of ..omega../sub Hi/ less than ..omega.. less than ..omega../sub He/ and ..omega.. much less than ..omega../sub Hi/ in the ''quasivacuum'' approximation (parallel bar n/sup 2/ -- 1 parallel bar much less than 1) are analogous to the properties of normal waves in a cold plasma in the corresponding frequency intervals. A distinguishing feature of a relativistic plasma is the attenuation of the waves caused by the presence in it of a continuous spectrum of gyrofrequencies and strong spatial dispersion. The instability increments of Alfven and fast magnetosonic waves, connected with the one-dimensionality of the distribution function, are found for quasilongitudinal propagation.},
doi = {},
url = {https://www.osti.gov/biblio/7130075}, journal = {Astrophysics (Engl. Transl.); (United States)},
number = ,
volume = 11:2,
place = {United States},
year = {1975},
month = {1}
}