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Title: Influence of metastable atoms in the simulation of hollow cathode discharge

The characteristics of hollow cathode discharge are investigated by using two-dimensional fluid model combined with a transport model for metastable atoms (F-M model) in argon. It shows that the stepwise ionization is one of main important mechanism for electrons production. The distribution of electric potential, density of electrons, ions, and metastable atoms are calculated with a pressure of 10 Torr and a voltage of 250 V. The peak density of electron and ion is 1.2×10{sup 13} cm{sup −3}, and the peak density of metastable atoms is 3.5×10{sup 13} cm{sup −3}. The results obtained in F-M model are compared with that in fluid model (without metastable atoms involved). Metastable atoms are found to play an important role in the discharge. In addition, with the increase of pressure and voltage, the percentage of stepwise ionization in the total ionization increase, and the difference of discharge characteristics simulated by these two kinds of models rises.
Authors:
;  [1] ;  [2] ;  [3]
  1. Electrostatic Research Institute, Hebei University, Baoding 071002 (China)
  2. Institute of Science, Hebei Agriculture University, Baoding 071001 (China)
  3. School of Science, Beijing Institute of Technology, Beijing 100081 (China)
Publication Date:
OSTI Identifier:
22218381
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 12; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 74 ATOMIC AND MOLECULAR PHYSICS; ARGON; ATOMS; COMPARATIVE EVALUATIONS; ELECTRIC DISCHARGES; ELECTRIC POTENTIAL; ELECTRONS; HOLLOW CATHODES; IONS; METASTABLE STATES; PLASMA DENSITY; PLASMA FLUID EQUATIONS; PLASMA SIMULATION; TRANSPORT THEORY; TWO-DIMENSIONAL CALCULATIONS