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This paper presents the experimental results by charge-exchange fast neutral particle measurements with neutral particle energy analyzer (NPA) in lower hybrid current drive (LHCD) experiments, which firstly show ion heating of LHCD on HT-7 superconducting tokamak. The LHCD experiments on HT-7 tokamak were carried out with the following paramenters: B_t=1.8 T, I_p=110～150 kA, n_e=(0.8～2)×10~(13)cm~(-3). The lower hybrid wave (LHW) had a pulse duration of 360ms and power of about 300 kW with an peak of parallel refractive index of N_〃=2.9.
This paper presents the experimental results by charge-exchange fast neutral particle measurements with neutral particle energy analyzer (NPA) in lower hybrid current drive (LHCD) experiments, which showed show ionization of LHCD on HT-7 superconducting tokamak. The LHCD experiments on HT-7 tokamak were carried out with the following paramenters: B_t = 1.8 T, I_p = 110 ~ 150 kA and n_e = (0.8 ~ 2) × 10 ~ (13) cm ~ ) had a pulse duration of 360 ms and power of about 300 kW with an peak of parallel refractive index of N_〃 = 2.9.