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Title: Emission from mode conversion regions

Abstract

The emission of multi-component waves by sources in non-uniform media of arbitrary spatial dimensions is discussed. If the emission occurs in the vicinity of a mode conversion region - i.e., a region where the local dispersion relations for two polarizations become nearly degenerate - the far field is very complex. The special case of plane-wave sources was analyzed in detail and it was shown that the qualitative nature of the far field is completely determined by the ray geometry of the un-coupled modes. The numerical simulations were conducted for a model problem involving two interacting 1-D wave modes excited in a non-stationary and non-homogeneous medium. The qualitative picture of emission agrees with the theoretical predictions.

Authors:
;  [1]
  1. Physics Department, College of William and Mary, Williamsburg, Virginia 23187-8795 (United States)
Publication Date:
OSTI Identifier:
21210489
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 485; Journal Issue: 1; Conference: 13. topical conference on radio frequency power in plasmas, Annapolis, MD (United States), 12-14 Apr 1999; Other Information: DOI: 10.1063/1.59754; (c) 1999 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPUTERIZED SIMULATION; D WAVES; DISPERSION RELATIONS; EMISSION; MAXWELL EQUATIONS; MODE CONVERSION; PLASMA; PLASMA SIMULATION; POLARIZATION; RF SYSTEMS; WAVE PROPAGATION

Citation Formats

Krasniak, Yuri, and Tracy, Eugene R. Emission from mode conversion regions. United States: N. p., 1999. Web. doi:10.1063/1.59754.
Krasniak, Yuri, & Tracy, Eugene R. Emission from mode conversion regions. United States. doi:10.1063/1.59754.
Krasniak, Yuri, and Tracy, Eugene R. Mon . "Emission from mode conversion regions". United States. doi:10.1063/1.59754.
@article{osti_21210489,
title = {Emission from mode conversion regions},
author = {Krasniak, Yuri and Tracy, Eugene R.},
abstractNote = {The emission of multi-component waves by sources in non-uniform media of arbitrary spatial dimensions is discussed. If the emission occurs in the vicinity of a mode conversion region - i.e., a region where the local dispersion relations for two polarizations become nearly degenerate - the far field is very complex. The special case of plane-wave sources was analyzed in detail and it was shown that the qualitative nature of the far field is completely determined by the ray geometry of the un-coupled modes. The numerical simulations were conducted for a model problem involving two interacting 1-D wave modes excited in a non-stationary and non-homogeneous medium. The qualitative picture of emission agrees with the theoretical predictions.},
doi = {10.1063/1.59754},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 485,
place = {United States},
year = {1999},
month = {9}
}