Field electron emission from metal surfaces irradiated with helium plasmas
Field electron emission from metal surfaces irradiated with helium plasmas
复制标题
氦等离子体辐照金属表面的场电子发射
DOI：
10.1109/deiv.2016.7748671
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
D. Sinelnikov
中科院分区：
文献类型：
--
作者：
D. Hwangbo;S. Kajita;N. Ohno;D. Sinelnikov
测量了氦等离子体辐照几种不同金属表面的场发射特性。纳米结构、针孔和环状钽表面的场发射电流明显高于抛光钽（Ta）表面。微击穿前后，电流密度在~1 μA/mm2以下时，场增强因子略有增加。击穿后电场增强系数显著增加，电流密度可达~100 μA/mm2。在扫描电镜下观察到熔化的阴极斑点。击穿后场增强因子的增加可能是由熔化点的热场电子发射引起的。
Field emission properties on several different metal surfaces irradiated with helium plasmas were measured. Field emission currents from nanostructure, pinhole, and loop-like tantalum surfaces were significantly higher than that from polished tantalum (Ta) surface. Before and after the micro-breakdown, where the current density was under ~1 μA/mm2, field enhancement factor showed slight increase. On the other hand, significant increase of field enhancement factor was measured after breakdown, where the current density increased up to ~100 μA/mm2. In the scanning electron microscope observation, melted cathode spots were detected. The increment of field enhancement factor after the breakdown may be induced by thermo-field electron emission from the melted spots.
影响因子：
3.3
作者：
Kajita, Shin;Sakaguchi, Wataru;Saeki, Tsubasa
通讯作者：
Saeki, Tsubasa