Experimental Results on ICRF Heating in JFT-2

摘要

600 kW of ICRF power is coupled to the JFT-2 plasma from the high field side using small area antennae (460 cm exp 2 ). By the net input of 500 kW, ion temperature increases from 0.4 to 0.8 keV, that of electron 0.6 to 0.9 keV, and the increment of beta sub(P) is 0.35 -- 0.4. The heating mechanism changes with the ratio of minority H species in D plasma (n sub(H)/n sub(D)), but clear dependence on the n sub(H)/n sub(D) is not observed for the heating efficiency. Deuterium high energy tail is observed, which indicates direct absorption of the RF power by the majority deuterium. (Atomindex citation 14:770089)