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Title: Slow Wave Propagation and Sheath Interaction for ICRF Waves in the Tokamak SOL

Abstract

In previous work we studied the propagation of slow-wave resonance cones launched parasitically by a fast-wave antenna into a tenuous magnetized plasma. Here we extend the previous calculation to ''dense'' scrape-off-layer (SOL) plasmas where the usual slow wave is evanescent. Using the sheath boundary condition, it is shown that for sufficiently close limiters, the slow wave couples to a sheath plasma wave and is no longer evanescent, but radially propagating. A self-consistent calculation of the rf-sheath width yields the resulting sheath voltage in terms of the amplitude of the launched SW, plasma parameters and connection length.

Authors:
;  [1]
  1. Lodestar Research Corporation, 2400 Central Ave., P-5, Boulder, Colorado, 80301 (United States)
Publication Date:
OSTI Identifier:
21335695
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1187; Journal Issue: 1; Conference: 18. topical conference on radio frequency power in plasmas, Gent (Belgium), 24-26 Jun 2009; Other Information: DOI: 10.1063/1.3273717; (c) 2009 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; ANTENNAS; BOUNDARY CONDITIONS; ELECTRIC POTENTIAL; ICR HEATING; LIMITERS; PLASMA; PLASMA DENSITY; PLASMA SCRAPE-OFF LAYER; PLASMA SHEATH; PLASMA WAVES; RF SYSTEMS; TOKAMAK DEVICES; WAVE PROPAGATION

Citation Formats

Myra, J R, and D'Ippolito, D A. Slow Wave Propagation and Sheath Interaction for ICRF Waves in the Tokamak SOL. United States: N. p., 2009. Web. doi:10.1063/1.3273717.
Myra, J R, & D'Ippolito, D A. Slow Wave Propagation and Sheath Interaction for ICRF Waves in the Tokamak SOL. United States. https://doi.org/10.1063/1.3273717
Myra, J R, and D'Ippolito, D A. Thu . "Slow Wave Propagation and Sheath Interaction for ICRF Waves in the Tokamak SOL". United States. https://doi.org/10.1063/1.3273717.
@article{osti_21335695,
title = {Slow Wave Propagation and Sheath Interaction for ICRF Waves in the Tokamak SOL},
author = {Myra, J R and D'Ippolito, D A},
abstractNote = {In previous work we studied the propagation of slow-wave resonance cones launched parasitically by a fast-wave antenna into a tenuous magnetized plasma. Here we extend the previous calculation to ''dense'' scrape-off-layer (SOL) plasmas where the usual slow wave is evanescent. Using the sheath boundary condition, it is shown that for sufficiently close limiters, the slow wave couples to a sheath plasma wave and is no longer evanescent, but radially propagating. A self-consistent calculation of the rf-sheath width yields the resulting sheath voltage in terms of the amplitude of the launched SW, plasma parameters and connection length.},
doi = {10.1063/1.3273717},
url = {https://www.osti.gov/biblio/21335695}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1187,
place = {United States},
year = {2009},
month = {11}
}