用于诊断中性束注入器的带冷阴极的长脉冲弧光放电等离子体源。

Long-pulse arc-discharge plasma source with cold cathode for diagnostic neutral beam injector.

作者信息

Deichuli P P, Ivanov A A, Stupishin N V

机构信息

Budker Institute of Nuclear Physics, Novosibirsk, Russia.

出版信息

Rev Sci Instrum. 2008 Feb;79(2 Pt 2):02C106. doi: 10.1063/1.2821511.

DOI:10.1063/1.2821511

PMID:18315232

Abstract

Long-pulse cold cathode arc-discharge plasma generators have been successfully used as high-quality hydrogen ion sources for plasma diagnostic neutral beams. One of the main advantages of this type of plasma source is a high proton fraction (80%-90%). However, the lifetime of the plasma source is limited due to intensive electrode's erosion, especially at the cathode region. An optimized design of the cathode and the nearest electrodes is found which reduces the erosion and allows us to increase the pulse length. The plasma source produces the extracted ion current up to 3 A at a low angular divergence, and at the pulse duration up to 2 s.

摘要

长脉冲冷阴极电弧放电等离子体发生器已成功用作等离子体诊断中性束的高质量氢离子源。这种等离子体源的主要优点之一是质子分数高（80%-90%）。然而，由于电极的强烈侵蚀，特别是在阴极区域，等离子体源的寿命受到限制。已找到一种阴极和最邻近电极的优化设计，可减少侵蚀并使我们能够增加脉冲长度。该等离子体源在低角发散情况下，脉冲持续时间长达2 s时，可产生高达3 A的提取离子电流。