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Title: A contribution to spectroscopic diagnostics and cathode sheath modeling of micro-hollow gas discharge in argon

Abstract

In this paper, the hydrogen Balmer beta line shape from a micro-hollow gas discharge (MHGD) in argon with traces of hydrogen is used for simultaneous diagnostics of plasma and cathode sheath (CS) parameters. For this purpose, a simple model of relevant processes responsible for the line broadening is introduced and applied to the Balmer beta profile recorded from a MHGD generated in the microhole (diameter 100 {mu}m at narrow side and 130 {mu}m at wider side) of a gold-alumina-gold sandwich in the pressure range (100-900 mbar). The electron number density N{sub e} in the range (0.4-4.5) x 10{sup 20} m{sup -3} is determined from the width of the central part of the Balmer beta line profile, while, from the extended wings of the Balmer beta profile, induced by dc Stark effect, the next three parameters are determined: the average value E{sub a} of electric field strength in the CS in the range (16-95 kV/cm), the electric field strength E{sub 0} at the cathode surface in the range (32-190 kV/cm), and the CS thickness z{sub g} in the range (18-70 {mu}m). All four MHGD parameters, N{sub e}, E{sub a}, E{sub 0}, and z{sub g}, compare reasonably well with results of themore » modeling experiment by M. J. Kushner [J. Phys. D: Appl. Phys. 38, 1633 (2005)]. The results for N{sub e} are compared with other emission experiments.« less

Authors:
; ; ;  [1]
  1. Faculty of Physics, University of Belgrade, P.O. Box 368, Belgrade 11001 (Serbia)
Publication Date:
OSTI Identifier:
22036673
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 110; Journal Issue: 3; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALUMINIUM OXIDES; ARGON; CATHODES; COMPARATIVE EVALUATIONS; ELECTRIC FIELDS; ELECTRON DENSITY; ELECTRONS; EMISSION SPECTROSCOPY; GLOW DISCHARGES; GOLD; HYDROGEN; LINE BROADENING; PLASMA; PLASMA DENSITY; PLASMA DIAGNOSTICS; PLASMA SHEATH; PLASMA SIMULATION; STARK EFFECT; SURFACES

Citation Formats

Cvejic, M., Spasojevic, Dj., Sisovic, N. M., and Konjevic, N.. A contribution to spectroscopic diagnostics and cathode sheath modeling of micro-hollow gas discharge in argon. United States: N. p., 2011. Web. doi:10.1063/1.3615962.
Cvejic, M., Spasojevic, Dj., Sisovic, N. M., & Konjevic, N.. A contribution to spectroscopic diagnostics and cathode sheath modeling of micro-hollow gas discharge in argon. United States. doi:10.1063/1.3615962.
Cvejic, M., Spasojevic, Dj., Sisovic, N. M., and Konjevic, N.. Mon . "A contribution to spectroscopic diagnostics and cathode sheath modeling of micro-hollow gas discharge in argon". United States. doi:10.1063/1.3615962.
@article{osti_22036673,
title = {A contribution to spectroscopic diagnostics and cathode sheath modeling of micro-hollow gas discharge in argon},
author = {Cvejic, M. and Spasojevic, Dj. and Sisovic, N. M. and Konjevic, N.},
abstractNote = {In this paper, the hydrogen Balmer beta line shape from a micro-hollow gas discharge (MHGD) in argon with traces of hydrogen is used for simultaneous diagnostics of plasma and cathode sheath (CS) parameters. For this purpose, a simple model of relevant processes responsible for the line broadening is introduced and applied to the Balmer beta profile recorded from a MHGD generated in the microhole (diameter 100 {mu}m at narrow side and 130 {mu}m at wider side) of a gold-alumina-gold sandwich in the pressure range (100-900 mbar). The electron number density N{sub e} in the range (0.4-4.5) x 10{sup 20} m{sup -3} is determined from the width of the central part of the Balmer beta line profile, while, from the extended wings of the Balmer beta profile, induced by dc Stark effect, the next three parameters are determined: the average value E{sub a} of electric field strength in the CS in the range (16-95 kV/cm), the electric field strength E{sub 0} at the cathode surface in the range (32-190 kV/cm), and the CS thickness z{sub g} in the range (18-70 {mu}m). All four MHGD parameters, N{sub e}, E{sub a}, E{sub 0}, and z{sub g}, compare reasonably well with results of the modeling experiment by M. J. Kushner [J. Phys. D: Appl. Phys. 38, 1633 (2005)]. The results for N{sub e} are compared with other emission experiments.},
doi = {10.1063/1.3615962},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 3,
volume = 110,
place = {United States},
year = {2011},
month = {8}
}