Enhanced Mode Conversion of Thermally Emitted Electron Bernstein Waves (EBW)to Extraordinary Mode

Jones, B. ; Efthimion, P.C. ; Taylor, G. ; Munsat, T. ; Wilson, J.R. ; Hosea, J.C. ; Kaita, R. ; Majeski, R. ; Maingi, R. ; Shiraiwa, S. ; Spaleta, J.

Princeton University. Plasma Physics Laboratory.

关键词: Heating;    70 Plasma Physics And Fusion Technology;    Electron Density;    Efficiency;    Mode Conversion;   

DOI  :  10.2172/795719
RP-ID  :  PPPL-3659.pdf
RP-ID  :  AC02-76CH03073
RP-ID  :  795719

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来源: UNT Digital Library

【 摘 要 】

In the CDX-U spherical torus, approximately 100% conversion of thermal EBWs to X-mode has been observed by controlling the electron density scale length (Ln) in the conversion region with a local limiter outside the last closed flux surface. The radiation temperature profile agrees with Thomson scattering electron temperature data. Results are consistent with theoretical calculations of conversion efficiency using measured Ln. By reciprocity of the conversion process, prospects for efficient coupling in EBW heating and current drive scenarios are strongly supported.