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Electron Heating of LHCD Plasma in HT-7 Tokamak

Electron heating via lower hybrid current drive (LHCD) has been investigated in HT-7 superconducting tokamak. Experiments show that the central electron temperature Te0, the volume averaged electron temperature  and the peaking factor of the electron temperature QTe = Te0/ increase with the lower hybrid wave (LHW) power. Simultaneously the electron heating efficiency and the electron temperature as the function of the central line-averaged electron density (ne) and the plasma current (Ip) have also been investigated. The experimental results are in a good agreement with those of the classical collision theory and the LHW power deposition theory.