Reflection and absorption of electromagnetic waves obliquely incident on a half-space relativistic plasma
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.
- Research Organization:
- The City University of New York, College of Staten Island, St. George Campus, Staten Island, New York 10301
- OSTI ID:
- 5124783
- Journal Information:
- Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 23:8; ISSN PFLDA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
ABSORPTIVITY
ANALYTICAL SOLUTION
BOLTZMANN-VLASOV EQUATION
BOUNDARY CONDITIONS
DAMPING
DIFFERENTIAL EQUATIONS
DISPERSION RELATIONS
ELECTROMAGNETIC RADIATION
ENERGY RANGE
EQUATIONS
HEATING
LANDAU DAMPING
MAXWELL EQUATIONS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PLASMA
PLASMA HEATING
POLARIZATION
RADIATIONS
REFLECTIVITY
RELATIVISTIC RANGE
SURFACE PROPERTIES
WAVE PROPAGATION