HL-1M装置在NBI期间注入H弹丸和Al杂质的辐射损失特性

RADIATION LOSS FEATURES OF NBIPLASMA DURING INJECTION OF THEH PELLETAND Al IMPURITY IN THE HL-1M TOKAMAK

使用十六道探测器阵列在HL1M装置上对中性束加热等离子体中注入氢丸和铝杂质的辐射损失功率进行了测量。通过对测量数据的分析,获得了以下主要实验结果:(1)中性束加热等离子体辐射损失功率密度分布在等离子体小半径(35)a范围内较平坦,辐射功率密度为0.1W·cm-3左右;(2)在中性束加热期间,用激光吹气注入铝杂质,辐射损失功率密度增加了1倍,但它的分布不明显峰化;(3)注入的氢丸使等离子体辐射损失功率密度增加了2倍多,且辐射损失功率密度分布显著峰化。

The radiation loss features of NBI plasma during injection ofthe H pellet and Al impurity using the sixteen channelradiation loss measurement system are described in the HL 1 M tokamak.Theexperimentresultsare obtained asfollow:(1 ) Pradisabout0 .1 W· cm- 3within the bound of(3 5) a (a=2 6cm ) in the NBIplasma,(2 ) Pradis double thatof NBIheating plas ma as Alisinjected by using the laserblow offtechnique,and(3 ) Pradis three timesthatof NBI heating plasma as H pelletisinjected.