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Journal Articles Physics of Plasmas Year : 2016

Plasma dynamics of a laser filamentation-guided spark

Abstract

We investigate experimentally the plasma dynamics of a centimeter-scale, laser filamentation-guided spark discharge. Using electrical and optical diagnostics to study monopolar discharges with varying current pulses we show that plasma decay is dominated by free electron recombination if the current decay time is shorter than the recombination characteristic time. In the opposite case, the plasma electron density closely follows the current evolution. We demonstrate that this criterion holds true in the case of damped AC sparks, and that alternative current is the best option to achieve a long plasma lifetime for a given peak current.
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Dates and versions

hal-01385550 , version 1 (21-10-2016)

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Guillaume Point, Léonid Arantchouk, Jérôme Carbonnel, André Mysyrowicz, Aurélien Houard. Plasma dynamics of a laser filamentation-guided spark. Physics of Plasmas, 2016, 23 (9), pp.093505. ⟨10.1063/1.4962517⟩. ⟨hal-01385550⟩
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