Shockwave-assisted laser filament conductivity

Schubert, Elise; Mongin, Denis; Produit, Thomas; Schimmel, Guillaume; Kasparian, Jérôme; Wolf, Jean-Pierre

doi:10.1063/1.5006854

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Title		Shockwave-assisted laser filament conductivity
Authors		Schubert, Elise Mongin, Denis Produit, Thomas Schimmel, Guillaume Kasparian, Jérôme Wolf, Jean-Pierre
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		Laser — Femtoseconde — Haute tension — Décharge — Guidage — Onde de choc — Femtosecond — High voltage — Discharge — Guiding — Shockwave
Identifiers		DOI: 10.1063/1.5006854 arXiv: 1711.08212
Full text		Article (Accepted version) (459 Kb) - Free access
Structures		Centres et instituts / Institut des sciences de l'environnement Faculté des sciences / Section de physique / Groupe de physique appliquée
Research groups		Groupe Kasparian Groupe Wolf ISE Climat ISE Pôle Sciences
Projects		European Commission: LLR European Commission: FILATMO
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 https://archive-ouverte.unige.ch/unige:99688