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Title: Feasibility study of microwave electron heating on the C-2 field-reversed configuration device

Different microwave heating scenarios for the C-2 plasmas have been investigated recently with use of both the Genray ray-racing code and the IPF-FDMC full-wave code, and the study was focused on the excitation of the electron Bernstein wave (EBW) with O-mode launch. For a given antenna position on C-2 and the fixed 2D plasma density and equilibrium field profiles, simulations have been done for six selected frequencies (2.45 GHz, 5 GHz, 8 GHz, 18 GHz, 28 GHz, and 50 GHz). Launch angles have been optimized for each case in order to achieve high coupling efficiencies to the EBW by the O-X-B mode conversion process and high power deposition. Results show that among those six frequencies, the case of 8 GHz is the most promising scenario, which has both high mode conversion efficiency (90%) and the relatively deeper power deposition.
Authors:
; ; ;  [1] ;  [2] ;  [3]
  1. Tri Alpha Energy, Inc., P.O. Box 7010, Rancho Santa Margarita, CA 92688 (United States)
  2. IGVP, University of Stuttgart, Pfaffenwaldring 31, 70569 Stuttgart (Germany)
  3. CompX, P.O. Box 2672, Del Mar, CA 92014 (United States)
Publication Date:
OSTI Identifier:
22496231
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1689; Journal Issue: 1; Conference: 21. topical conference on radio frequency power in plasmas, Lake Arrowhead, CA (United States), 27-29 Apr 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANTENNAS; BERNSTEIN MODE; DEPOSITION; EFFICIENCY; ELECTRONS; EXCITATION; FEASIBILITY STUDIES; FIELD-REVERSED THETA PINCH DEVICES; GHZ RANGE 01-100; MICROWAVE HEATING; MICROWAVE RADIATION; MODE CONVERSION; PLASMA DENSITY; PLASMA WAVES; SIMULATION; TWO-DIMENSIONAL CALCULATIONS