1. Feasibility study of microwave electron heating on the C-2 field-reversed configuration device
- Author
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Alf Koehn, Sean Dettrick, Xiaokang Yang, F. Ceccherini, Yuri Petrov, and Michl Binderbauer
- Subjects
Physics ,Coupling ,Optics ,business.industry ,Energy conversion efficiency ,Field-reversed configuration ,Electronic engineering ,Plasma ,Electron ,Antenna (radio) ,business ,Microwave ,Excitation - Abstract
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.
- Published
- 2015
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