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Shockwave-assisted laser filament conductivity

Published in Applied physics letters. 2017, vol. 111, no. 21, 211103
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 LaserFemtosecondeHaute tensionDéchargeGuidageOnde de chocFemtosecondHigh voltageDischargeGuidingShockwave
arXiv: 1711.08212
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Article (Accepted version) (459 Kb) - public document Free access
Research groups Groupe Kasparian
Groupe Wolf
ISE Climat
ISE Pôle Sciences
European Commission: LLR
European Commission: FILATMO
(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 https://archive-ouverte.unige.ch/unige:99688

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Deposited on : 2017-11-27

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