Enhancement of Arc Ignition on Tungsten in Helium Plasmas with Impurity Gases

被引：0

作者：

Zhang R. ^{[1
]}

Kajita S. ^{[2
]}

Hwangbo D. ^{[3
]}

Tanaka H. ^{[1
]}

Ohno N. ^{[1
]}

机构：

[1] Graduate School of Engineering, Nagoya University, Nagoya

[2] Institute of Materials and Sustainable Systems, Nagoya University, Nagoya

[3] Faculty of Pure and Applied Sciences, University of Tsukuba, 305-8577, Ibaraki

来源：

Plasma and Fusion Research | 2021年 / 16卷

基金：

日本学术振兴会;

关键词：

fuzz; impurity seeding; nano-tendril bundles; tungsten; unipolar arc;

D O I：

10.1585/PFR.16.2405069

中图分类号：

学科分类号：

摘要：

Arcing was ignited on deformed tungsten (W) surfaces, where W fuzz and/or nano-tendril bundles (NTBs) were grown, by steady state helium (He) plasma exposures with impurity gas seeding. At the same sample potential of −250 V, the presence of NTBs enhanced the frequency of arc ignition, whereas no arc ignition appeared on typical fuzz surfaces without NTBs. After a series of arc ignitions on a sample surface with NTBs, the aspect ratio of NTBs decreased, indicating that protruded NTBs with larger aspect ratio tend to trigger arcing easily. © 2021. The Japan Society of Plasma Science and Nuclear Fusion Research.

引用

页码：1 / 5

页数：4

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