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Potential BarrierFormation and Electric Field Ｒeversal in Cylindrical Hollow Cathode Discharge
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20161202132818
Title: Potential barrierformation and electric field reversal in cylindrical hollow cathode discharge
Author affiliation: 1 Institute of Science, Hebei Agriculture University, Baoding, China
2 College of Physics Science and Technology, Hebei University, Baoding, China
Corresponding author: He, Shoujie (
Source title: Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology
Abbreviated source title: Zhenkong Kexue yu Jishu Xuebao
Volume: 35
Issue: 12
Issue date: December 1, 2015
Publication year: 2015
Pages: 1420-1426
Language: Chinese
ISSN: 16727126
CODEN: CKKSDV
Document type: Journal article (JA)
Publisher: Science Press
Abstract: The electric field-reversal in cylindrical hollow cathode discharge was mathematically described with fluid model and transport model of metastable Ar-atom, theoretically analyzed and numerically simulated. The potential distribution, electron and ion densities, an d particle flow rates at 220 V and 133 Pa of argon were calculated. The influence the variables, including but not limited to the voltage, diffusion rate and current density of electrons, on the field reversal was investigated. The peaks of electron and ion densities, 2.4×1010cm-3, locate at the discharge-cell center; however, the ion density is much higher than the electron density in the cathode sheath. Depending strongly on the ratio of the electron diffusion and flowing rates, the axial field-reversal occurs, accompanied by potential-barrier formation at the center, because the potential in negative glow region is higher than the anode potential. Moreover, an increase of the voltage fastens the electron diffusion rate, and enhances both the field reversal and potential-barrier formation. © 2015, Science Press. All right reserved.
Number of references: 11
Main heading: Electric discharges
Controlled terms: Cathodes - Diffusion - Diffusion barriers - Diffusion in liquids - Electric fields - Electrodes - Electron sources - Electrons - Ions - Transport properties
Uncontrolled terms: Density of electrons - Electric fieldreversal - Electron and ion densities - Electron diffusion - Hollow cathode discharge - Metastable atoms - Particle flow - Potential distributions
Classification code: 701.1Electricity: Basic Concepts and Phenomena - 931.2Physical Properties of Gases, Liquids and Solids
DOI: 10.13922/j.cnki.cjovst.2015.12.04
Database: Compendex
Compilation and indexing terms, © 2016 Elsevier Inc.
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