Abstract
Neutral beam injection (NBI) experiments have been carried out with twooperation modes of a bucket ion source in the HL-1M tokamak. During thefirst mode, more than 30% rise in ion temperature above the Ohmiclevel is routinely achieved after NBI power about 0.5 MW is injected.Ion temperature only increases 20-30% for the second operation mode,which is often limited by current termination. The heating effects ofthe NBI have been analysed experimentally and theoretically. Theperformance of the NBI system is well described.
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