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Scientific article
Open access
English

Shockwave-assisted laser filament conductivity

Published inApplied Physics Letters, vol. 111, no. 21, 211103
Publication date2017
Abstract

We investigate the influence of ultrashort laser filaments on high-voltage discharges and spark-free unloading at various repetition rates and wind conditions. For electric fields well below, close to and above the threshold for discharges, we respectively observe remote spark-free unloading, discharge suppression, and discharge guiding. These effects rely on an indirect consequence of the thermal deposition, namely the fast dilution of the ions by the shockwave triggered by the filament at each laser shot. This dilution drastically limits recombination and increases the plasma channel conductivity that can still be non-negligible after tens or hundreds of milliseconds. As a result, the charge flow per pulse is higher at low repetition rates.

Keywords
  • Laser
  • Femtoseconde
  • Haute tension
  • Décharge
  • Guidage
  • Onde de choc
  • Femtosecond
  • High voltage
  • Discharge
  • Guiding
  • Shockwave
Funding
  • European Commission - Laser Lightning Rod [737033]
  • European Commission - Laser Filamentation for Probing and Controlling Atmospheric Processes [291201]
Citation (ISO format)
SCHUBERT, Elise et al. Shockwave-assisted laser filament conductivity. In: Applied Physics Letters, 2017, vol. 111, n° 21, p. 211103. doi: 10.1063/1.5006854
Main files (1)
Article (Accepted version)
accessLevelPublic
Identifiers
ISSN of the journal0003-6951
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266downloads

Technical informations

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