氢等离子体中分子辅助复合的观测
Observation of the molecular assisted recombination in a hydrogen plasma
摘要：
利用线性偏滤器等离子体模拟器TPD-SheetIV，对分离氢等离子体中分子辅助电离（MAR）的空间结构进行了实验观测，包括解离复合和相互中和通道。质量分析结果表明，在一定的气压范围内，等离子体中心的解离复合占主导地位。同时，观察到MAR中通过H-离子形成的相互中和发生在等离子体的外围，其中发现冷电子（~1 eV），H-离子形成是由解离电子附着到H2（v）产生的。
英文摘要：
We have presented the experimental observation of the spatial structure of Molecular Assisted Recombination (MAR) including both dissociative recombination and mutual neutralization channels in the detached hydrogen plasma in the linear divertor plasma simulator, TPD-SheetIV. It is shown from the results of mass-analysis (H2+, H3+) that dissociative recombination is dominant in the center of the plasma over a range of low gas pressures. At the same time, it is observed that the mutual neutralization in MAR via H- ion formation, which is produced by dissociative electron attachment to H2(v), occurs in the periphery of the plasma where cold electrons (~1 eV) are found.
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