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(EXP4/12) Study of LHW and IBW Synergy Experiment on the HT-7 Superconducting Tokamak

X. Gao¹⁾, HT-7 Team^1)
 
1) Institute of Plasma Physics, Academia Sinica, Hefei, China

Abstract.  A successful experiment on lower hybrid wave (LHW) and ion Bernstein wave (IBW) synergy has been carried out in the HT-7 superconducting tokamak. With 500 kW of LHW heating power and 200 kW of injected IBW power, it is observed that the ion temperature increases from 500 eV to about 850 eV, the electron temperature increases from 800 eV to 1.2 keV, and the averaged electron density increases from 0.9×10¹⁹m^{- 3} to 2.6×10¹⁹m^{- 3}. The plasma parameters were obviously enhanced by means of the LHW and IBW heating and their synergy. The charge-exchange spectra of the neutral particle analysis (NPA) diagnostics data clearly showed that the high-energy ion tail which was produced by the LHW was decreased by the synergy with the IBW, and the bulk ion temperature was increased. The mechanism of the LHW and IBW synergy effect is discussed.

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