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Scientific article
Open access
English

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

Published inNew Journal of Physics, vol. 19, no. 12, 123040
Publication date2017
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.

Keywords
  • High-voltage
  • Discharge
  • Ultrashort laser
  • Ultraviolet
  • Infrared
  • Visible
  • Filament
Funding
  • European Commission - Laser Filamentation for Probing and Controlling Atmospheric Processes [291201]
Citation (ISO format)
SCHUBERT, Elise et al. HV discharge acceleration by sequences of UV laser filaments with visible and near-infrared pulses. In: New Journal of Physics, 2017, vol. 19, n° 12, p. 123040. doi: 10.1088/1367-2630/aa9b76
Main files (1)
Article (Accepted version)
Identifiers
ISSN of the journal1367-2630
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