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Title: Low-temperature, high-density plasmas in long micro-tubes

Abstract

A low-temperature He microplasma plume generated in a micro quartz tube with the inner diameter decreasing from 245 μm to 6 μm is reported. The microplasma plume has a length of around 1.5 cm and reaches the position where the tube diameter is 10 μm. Though the inner diameter of the tube is in sub-millimeter, the cross section of the tube is not fully filled with the plasma only until the tube inner diameter is down to 30 μm. The electron density estimated from H{sub α} stark broadening increases as the inner diameter of the tube decreases. The ignition voltage increases from 11 kV to 40 kV as the diameter of the inner quartz tube decreases from 245 μm to 10 μm. Further analysis shows that, in order to ignite a non-equilibrium plasma plume in 1 μm diameter tube, the applied voltage of about 65 kV is needed and the plasma density could be as high as ∼10{sup 18 }cm{sup −3}.

Authors:
;  [1]
  1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China)
Publication Date:
OSTI Identifier:
22600220
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 5; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CROSS SECTIONS; ELECTRIC POTENTIAL; ELECTRON DENSITY; ELECTRONS; EQUILIBRIUM; LENGTH; NON-EQUILIBRIUM PLASMA; PLASMA DENSITY; PLUMES; QUARTZ; TEMPERATURE RANGE 0065-0273 K; THERMONUCLEAR IGNITION; TUBES

Citation Formats

Gou, J., Xian, Y., Lu, X., E-mail: luxinpei@hotmail.com, and IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240. Low-temperature, high-density plasmas in long micro-tubes. United States: N. p., 2016. Web. doi:10.1063/1.4949349.
Gou, J., Xian, Y., Lu, X., E-mail: luxinpei@hotmail.com, & IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240. Low-temperature, high-density plasmas in long micro-tubes. United States. doi:10.1063/1.4949349.
Gou, J., Xian, Y., Lu, X., E-mail: luxinpei@hotmail.com, and IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240. Sun . "Low-temperature, high-density plasmas in long micro-tubes". United States. doi:10.1063/1.4949349.
@article{osti_22600220,
title = {Low-temperature, high-density plasmas in long micro-tubes},
author = {Gou, J. and Xian, Y. and Lu, X., E-mail: luxinpei@hotmail.com and IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240},
abstractNote = {A low-temperature He microplasma plume generated in a micro quartz tube with the inner diameter decreasing from 245 μm to 6 μm is reported. The microplasma plume has a length of around 1.5 cm and reaches the position where the tube diameter is 10 μm. Though the inner diameter of the tube is in sub-millimeter, the cross section of the tube is not fully filled with the plasma only until the tube inner diameter is down to 30 μm. The electron density estimated from H{sub α} stark broadening increases as the inner diameter of the tube decreases. The ignition voltage increases from 11 kV to 40 kV as the diameter of the inner quartz tube decreases from 245 μm to 10 μm. Further analysis shows that, in order to ignite a non-equilibrium plasma plume in 1 μm diameter tube, the applied voltage of about 65 kV is needed and the plasma density could be as high as ∼10{sup 18 }cm{sup −3}.},
doi = {10.1063/1.4949349},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 23,
place = {United States},
year = {2016},
month = {5}
}