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个人信息Personal Information
教授
博士生导师
硕士生导师
性别：男
毕业院校：复旦大学
学位：博士
所在单位：物理学院
学科：凝聚态物理
办公地点：大连理工大学三束材料改性重点实验室1号楼203房间
联系方式：qyzhang@dlut.edu.cn 0411-84707930 转 13
电子邮箱：qyzhang@dlut.edu.cn
Mode Transition and Related Discharge Phenomena of a Tube Plasma Source Operating in Low-Pressure Pure Nitrogen Atmosphere
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论文类型：期刊论文
发表时间：2015-02-01
发表刊物：IEEE TRANSACTIONS ON PLASMA SCIENCE
收录刊物：SCIE、EI、Scopus
卷号：43
期号：2
页面范围：544-551
ISSN号：0093-3813
关键字：Discharge transition; low pressure (LP); plasma source
摘要：A low-frequency (20-80 kHz) tube plasma source was designed for plasma beam generation at low pressure. In the atmosphere of pure nitrogen, the plasma source exhibited two distinct discharge states. The discharge sustained at low current (G mode) was a capacitive discharge and transited into a resistive discharge self-pulsing mode (SP mode) when the current exceeded a critical level. The SP-mode discharge was identified to be a mixing discharge consisting of continuous discharge and periodic sparks or pulsing arcs. Powered with 10-110 W, the SP-mode discharge created a plasma plume with high electron density (0.9-5.1 x 10(11) cm(-3)) and relatively low electron temperature (1.62-0.55 eV). The vibrational and rotational temperatures of the SP-mode plasma in the tube were determined to be similar to 5000 K and 350-700 K by fitting the optical emission spectra, respectively, distinguishing from those of the G-mode discharge.