Suppression of ablation in femtosecond double pulse experiments

Details Suppression of ablation in femtosecond double pulse experiments Suppression of ablation in femtosecond double pulse experiments

2009-09-08

arxiv.org/abs/0909.1484v2

PRL 103, 195002 (2009)

Physics

Computational Physics

Submitted to one of the APS Journals

Scientific paper

We report the physical reasons of a curious decrease in the crater depth observed for long delays in experiments with femtosecond double pulses. Detailed hydrodynamic modeling demonstrates that the ablation mechanism is dumped when the delay between the pulses exceeds the electron-ion relaxation time. In this case, the interaction of the second laser pulse with the expanding target material leads to the formation of the second shock wave suppressing the rarefaction wave created by the first pulse. The evidence of this effect follows from the pressure and density profiles obtained at different delays after the first laser pulse.

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