抄録
We have investigated the behavior of neutral particles in a hydrogen plasma with a small tokamak NOVA-II by means of Ha line intensity measurement. Our particular attention was paid to the contribution of a limiter to the recycling and equilibrium balance of plasma particles. Hα line intensity at the limiter was three times as strong as those at other positions. Transport of the injected neutrals by gas puffing in the toroidal direction was also investigated. No direct contribution of injected neutrals was observed at the positions +/-90 degrees away from the gas injection valve in the toroidal direction.
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