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Title: Reflection and absorption of electromagnetic waves obliquely incident on a half-space relativistic plasma

Abstract

Reflection and absorption characteristics of electromagnetic waves obliquely incident upon a half-space relativistic Vlasov plasma are investigated. Numerical results comparing the properties of the s- and p-polarized waves are given. It is shown that the response of plasma can be best understood by studying the locations of the roots kappa/sub t/ and kappa/sub l/ of the transversal and longitudinal dispersion functions in the complex wavenumber plane. In general, s-polarized waves are reflected and p-polarized waves are absorbed more efficiently by the plasma. Total reflection occurs when kappa/sub t/ becomes zero for the case of s-polarization and when kappa/sub l/ becomes zero for the case of p-polarization. Total penetration of p-waves is obtained for sufficiently large frequencies at the Brewster angle theta/sub B/. These waves exhibit a sharp absorption peak at the characteristic angle theta/sub c/ at which the transversal transmission terminates. For a given temperature, p-waves are totally absorbed in the plasma at a specific frequency at which theta/sub B/=theta/sub c/. Absorption peaks are broader at higher temperatures. If both transversal and longitudinal modes propagate undamped at some value of angle of incidence theta, there exists a secondary smooth and broad absorption peak at larger values of theta for themore » p-waves. The magnitude of the secondary peak can also be appreciable at the ultrarelativistic temperatures.« less

Authors:
;
Publication Date:
Research Org.:
The City University of New York, College of Staten Island, St. George Campus, Staten Island, New York 10301
OSTI Identifier:
5124783
Resource Type:
Journal Article
Journal Name:
Phys. Fluids; (United States)
Additional Journal Information:
Journal Volume: 23:8
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; PLASMA; BOLTZMANN-VLASOV EQUATION; ELECTROMAGNETIC RADIATION; MAXWELL EQUATIONS; ABSORPTIVITY; ANALYTICAL SOLUTION; BOUNDARY CONDITIONS; DISPERSION RELATIONS; LANDAU DAMPING; PLASMA HEATING; POLARIZATION; REFLECTIVITY; RELATIVISTIC RANGE; WAVE PROPAGATION; DAMPING; DIFFERENTIAL EQUATIONS; ENERGY RANGE; EQUATIONS; HEATING; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; RADIATIONS; SURFACE PROPERTIES; 700108* - Fusion Energy- Plasma Research- Wave Phenomena

Citation Formats

Imre, K, and Ozizmir, E. Reflection and absorption of electromagnetic waves obliquely incident on a half-space relativistic plasma. United States: N. p., 1980. Web. doi:10.1063/1.863169.
Imre, K, & Ozizmir, E. Reflection and absorption of electromagnetic waves obliquely incident on a half-space relativistic plasma. United States. https://doi.org/10.1063/1.863169
Imre, K, and Ozizmir, E. Fri . "Reflection and absorption of electromagnetic waves obliquely incident on a half-space relativistic plasma". United States. https://doi.org/10.1063/1.863169.
@article{osti_5124783,
title = {Reflection and absorption of electromagnetic waves obliquely incident on a half-space relativistic plasma},
author = {Imre, K and Ozizmir, E},
abstractNote = {Reflection and absorption characteristics of electromagnetic waves obliquely incident upon a half-space relativistic Vlasov plasma are investigated. Numerical results comparing the properties of the s- and p-polarized waves are given. It is shown that the response of plasma can be best understood by studying the locations of the roots kappa/sub t/ and kappa/sub l/ of the transversal and longitudinal dispersion functions in the complex wavenumber plane. In general, s-polarized waves are reflected and p-polarized waves are absorbed more efficiently by the plasma. Total reflection occurs when kappa/sub t/ becomes zero for the case of s-polarization and when kappa/sub l/ becomes zero for the case of p-polarization. Total penetration of p-waves is obtained for sufficiently large frequencies at the Brewster angle theta/sub B/. These waves exhibit a sharp absorption peak at the characteristic angle theta/sub c/ at which the transversal transmission terminates. For a given temperature, p-waves are totally absorbed in the plasma at a specific frequency at which theta/sub B/=theta/sub c/. Absorption peaks are broader at higher temperatures. If both transversal and longitudinal modes propagate undamped at some value of angle of incidence theta, there exists a secondary smooth and broad absorption peak at larger values of theta for the p-waves. The magnitude of the secondary peak can also be appreciable at the ultrarelativistic temperatures.},
doi = {10.1063/1.863169},
url = {https://www.osti.gov/biblio/5124783}, journal = {Phys. Fluids; (United States)},
number = ,
volume = 23:8,
place = {United States},
year = {1980},
month = {8}
}