Title :
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
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;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2008.925541
