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Wave propagation through an electron cyclotron resonance layer

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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.

Year of Publication
1997
Journal
Plasma Physics and Controlled Fusion
Volume
39
Number
6
Number of Pages
1015-1029
Date Published
Jun
ISBN Number
0741-3335
DOI
PId
da36c8dc6300ba6ff50854b2de589c84
Journal Article
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