Back to Search Start Over

HV discharge acceleration by sequences of UV laser filaments with visible and near-infrared pulses

HV discharge acceleration by sequences of UV laser filaments with visible and near-infrared pulses

Authors :
Brian Kamer
Elise Schubert
Chengyong Feng
Jean-Pierre Wolf
Ali Rastegari
Jérôme Kasparian
Jean-Claude Diels
Ladan Arissian
Denis Mongin
Source :
New Journal of Physics, Vol. 19, No 12 (2017) P. 123040
Publication Year :
2017
Publisher :
arXiv, 2017.

Abstract

We investigate the triggering and guiding of DC high-voltage discharges over a distance of 37 cm by filaments produced by ultraviolet (266 nm) laser pulses of 200 ps duration. The latter reduce the breakdown electric field by half and allow up to 80% discharge probability in an electric field of 920 kV/m. This high efficiency is not further increased by adding nanosecond pulses in the Joule range at 532 nm and 1064 nm. However, the latter statistically increases the guiding length, thereby accelerating the discharge by a factor of 2. This effect is due both to photodetachment and to the heating of the plasma channel, that increases the efficiency of avalanche ionization and reduces electron attachment and recombination.<br />Comment: 12 pages, 6 figures

Details

ISSN :
13672630
Database :
OpenAIRE
Journal :
New Journal of Physics, Vol. 19, No 12 (2017) P. 123040
Accession number :
edsair.doi.dedup.....9e25b8c5d207a5aba154fed1cda56025
Full Text :
https://doi.org/10.48550/arxiv.1712.08483