Heavy-Impurity Recycling at a Limiter and Power-Loss Limitation to a Limiter in Tokamak.

摘要

Since the density of high-z impurities in tokamaks is generally observed to saturate,the heavy-impurity recycling rate is presumed to be less than unity. On this basis,plasma edge temperature is calculated to be low and an upper limit to power carried out by charged particles is estimated to be small as observed in experiment. This result suggests that the total radiation loss by low-and high-z impurities is always large in a conventional tokamak with high power input and small charge-exchange loss. (ERA citation 02:050435)