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

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 i...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied physics 2011-08, Vol.110 (3), p.033305-033305-10
Main Authors: Cvejic, M., Spasojevic, Dj, Sisovic, N. M., Konjevic, N.
Format: Article
Language:English
Subjects:
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
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 μ m at narrow side and 130 μ m at wider side) of a gold-alumina-gold sandwich in the pressure range (100-900 mbar). The electron number density N e in the range (0.4-4.5)×10 20 m -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 a of electric field strength in the CS in the range (16-95 kV/cm), the electric field strength E 0 at the cathode surface in the range (32-190 kV/cm), and the CS thickness z g in the range (18-70 μ m). All four MHGD parameters, N e , E a , E 0 , and z 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 e are compared with other emission experiments.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3615962