摘要
本文采用跨音速中性气体屏蔽模型,得到了氢同位素球形靶丸在其相应高能离子轰击下的消融率G_(is)及其定标律,s可为氢或氘。计算表明,当离子与电子的未扰态能量E_(0s)/E_(0e)~2≥1.5时,G_(is)/G_(es)≥20％,G_(es)为靶丸在等离子体电子轰击下的消融率。因此,当聚变实验有中性粒子束注入加热时,需考虑高能离子轰击对靶丸消融的影响。这也为此情况下靶丸消融强化提供了一种解释。
The ablation rate of a hydrogen isotopic spherical pellet Gis due to the impact of energetic ion of respective isotope and its scaling law are obtained using the transonic neutral-shielding model, where subscript s might refers to either hydrogen or deuterium. Numerical results show that if Eos/Eoe2≥1.5, Gis/Ges≥20%, where Eos and Eoe are the energy of undisturbed ion and electron, respectively, and Ges is the ablation rate of pellet due to the impact of electrons. Hence, under the NBI heating, the effect of the impact of energetic ions on the pellet ablation should be taken into consideration. This result also gives an explanation to the observed enhancement of pellet ablation during NBIH.
出处
《核聚变与等离子体物理》
CAS
CSCD
北大核心
1991年第3期143-149,共7页
Nuclear Fusion and Plasma Physics
关键词
氢
同位素
靶丸
离子
球形
聚变堆
Hydrogen isotope, Spherical pellet, Ion, Ablation, Scaling law.
