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Shockwave-assisted laser filament conductivity

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Published in Applied Physics Letters. 2017, vol. 111, no. 21, p. 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
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Research groups ISE Climat
Groupe Kasparian
Projects H2020: LLR
FP7: FILATMO
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SCHUBERT, Elise et al. Shockwave-assisted laser filament conductivity. In: Applied Physics Letters, 2017, vol. 111, n° 21, p. 211103. https://archive-ouverte.unige.ch/unige:99688

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Deposited on : 2017-11-27

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