VUV-VIS Imaging of High-Pressure Pulsed Volume Discharge in Argon

Author

Lissovski, Alexander A. ; Treshchalov, Alexey B.

Author_Institution

Inst. of Phys., Univ. of Tartu, Tartu

Volume

36

Issue

4

fYear

2008

Firstpage

958

Lastpage

959

Abstract

Spatial-time behavior of the transverse pulsed volume discharge in Ar at 4 bar is investigated with a pinhole-imaging technique. VUV Ar₂* emission, UV-VIS continuum, and Ar* red lines are used for direct monitoring of the discharge homogeneity in the breakdown and recombination stages. Observed fragmentation of the discharge into separate zones is connected with the dynamical change of the electron emittance of electrodes. Additional electrons, produced during secondary excitation pulses, transform effectively the reservoir of long-lived triplet Ar₂* molecules to fast-emitted singlet Ar₂* excimers.

Keywords

argon; discharges (electric); plasma collision processes; plasma diagnostics; triplet state; Ar; VUV-VIS imaging; discharge homogeneity; electron collisional mixing; electron emittance; high-pressure pulsed volume discharge; pinhole-imaging technique; pressure 4 bar; secondary excitation pulses; singlet excimers; spatial-time behavior; triplet molecules; $hbox{Ar}_{2}^{ast}$ excimers; $hbox{Ar}_{2}^{ast}$ excimers; UV-VIS continuum; VUV emission; electron-collisional mixing; high-pressure discharge; pinhole imaging;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2008.925541

Filename

4545379