Method for extracting volume produced negative ions
Method for extracting volume produced negative ions
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一种提取大量产生的负离子的方法
DOI：
10.1063/1.1139978
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
P. Devynck
中科院分区：
文献类型：
--
作者：
M. Bacal;J. Bruneteau;P. Devynck
通过平行于等离子体电极的弱磁场的存在，使该电极与体等离子体磁绝缘，大大改善了从体源中提取H−离子。当偏置为正时，等离子体电极耗尽相邻区域中的电子总数。为了保持等离子体中性，来自主等离子体的负离子取代该区域中的电子。因此，高比例的负离子在等离子体电极的前面积聚。这些现象的负离子束形成的影响进行了讨论。
The extraction of H− ions from a volume source is greatly improved by the presence of a weak magnetic field parallel to the plasma electrode that magnetically insulates this electrode from the bulk plasma. When biased positive, the plasma electrode depletes the electron population in the neighboring region. To maintain plasma neutrality, negative ions from the main plasma replace the electrons in this region. Thus a high fraction of negative ions builds up in front of the plasma electrode. The implications of these phenomena for negative ion beam formation are discussed.