Experimental studies on striations in helium glow discharge

被引：12
|
作者：
Zhu, Hailong [1 ]
Su, Zixuan [1 ]
Dong, Youer [1 ]
机构：
[1] Shanxi Univ, Coll Phys & Elect Engn, Taiyuan 030006, Shanxi, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2017年 / 111卷 / 05期
基金：
中国国家自然科学基金;
关键词：
IONIZATION WAVES; PLASMA; ELECTRON;
D O I：
10.1063/1.4992065
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
This letter reports the detailed observations and investigations of striations in the positive column region of helium glow discharges with a pin-to-plate copper electrode geometry in the pressure range 9-101 kPa. The striations are characterized by several plasma layers with alternate brightness and darkness. In this discharge, features such as negative glow, Faraday dark space, and striated positive column regions can be clearly observed. The evolution of a striation structure in the positive column region was found to be sensitive to gas pressure and electrode spacing. The striated discharge propagates in the form of an ionization wave with a velocity of 20.78 m/s and a frequency of 5.2 kHz. Published by AIP Publishing.
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页数：5
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