Compact Pulsed-Power Driver for Double Pulse Effect Studies in Nanosecond Laser Ablation

摘要

High-voltage double pulse of nanosecond duration ( $sim$ hundreds of nanoseconds) with extremely short interval ( $sim$ tens of nanoseconds) between the pulses can be used to study the double pulse effect in nanosecond laser ablation for laser-induced breakdown spectroscopy. A 0.5-GW compact pulsed-power driver is designed using the transmission line characteristics of the pulse forming line to generate two pulses with extremely short repetition interval. The impedance of the pulsed-power driver is 22 $Omega$ , and it generates two flat top high-voltage pulses of 100 kV, 100 ns duration with a interpulse repetition interval of 30 ns across the matched load.