Wave propagation through an electron cyclotron resonance layer

TitleWave propagation through an electron cyclotron resonance layer
Publication TypeJournal Article
Year of Publication1997
AuthorsE. Westerhof
JournalPlasma Physics and Controlled Fusion
Volume39
Number6
Pagination1015-1029
Date PublishedJun
ISBN Number0741-3335
Abstract

The propagation of a wave beam through an electron cyclotron resonance layer is analysed in two-dimensional slab geometry in order to assess the deviation from cold plasma propagation due to resonant, warm plasma changes in wave dispersion. For quasi-perpendicular propagation, N-parallel to x upsilon(1)/c, an O-mode beam is shown to exhibit a strong wiggle in the trajectory of the centre of the beam when passing through the fundamental electron cyclotron resonance. The effects are largest for low temperatures and close to perpendicular propagation. Predictions from standard dielectric wave energy fluxes are inconsistent with the trajectory of the beam. Qualitatively identical results are obtained for the X-mode second harmonic. In contrast, the X-mode at the fundamental resonance shows significant deviations from cold plasma propagation only for strongly oblique propagation and/or high temperatures. On the basis of the obtained results a practical suggestion is made for ray tracing near electron cyclotron resonance.

DOI10.1088/0741-3335/39/6/007
PID

da36c8dc6300ba6ff50854b2de589c84

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