Abstract
Ion heating mechanism of fast magnetosonic wave in the ion cyclotron range of frequency (ICRF) has been studied in the TNT-A tokamak. Ion temperature measurements have been made with mass separated neutral particle analyser. The effects of the fundamental proton cyclotron resonance layer (ICR) and the two-ion hybrid resonance layer (HBR) on ion heating are observed. In the case of hydrogen minority (ICR and HBR in the plasma), where the ratio of hydrogen-to-deuterium concentration, n H / n D , is 0.05, the increase in hydrogen temperature is larger than that in deuterium, and most of RF power is absorbed by hydrogen.
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