Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

1 Publication

Transient Laser-Induced Breakdown of Dielectrics in Ultrarelativistic Laser-Solid Interactions

Bernert, C.; Assenbaum, S.; Bock, S.; Brack, F.-E.; Cowan, T.; Curry, C. B.; Garten, M.; Gaus, L.; Gauthier, M.; Gebhardt, R.; GöDe, S.; Glenzer, S. H.; Helbig, U.; Kluge, T.; Kraft, S.; Kroll, F.; Obst-Huebl, L.; Püschel, T.; Rehwald, M.; Schlenvoigt, H.-P.; Schoenwaelder, C.; Schramm, U.; Treffert, F.; Vescovi Pinochet, M. A.; Ziegler, T.; Zeil, K.


For high-intensity laser-solid interactions, the absolute density and surface density gradients of the target at the arrival of the ultra-relativistic laser peak are critical parameters. Accurate modeling of the leading edge-driven target pre-expansion is desired to strengthen the predictive power of associated computer simulations. The transition from an initial solid state to a plasma state, i.e., the breakdown of the solid, defines the starting point of the subsequent target pre-expansion. In this work, we report on the time-resolved observation of transient laser-induced breakdown (LIB) during the leading edge of high-intensity petawatt-class laser pulses with peak intensities of up to 5.7 × 10^21 W/cm^2 in interaction with dielectric cryogenic hydrogen jet targets. LIB occurs much earlier than what is typically expected following the concept of barrier suppression ionization. The observation is explained by comparing a characterization study of target
specific LIB thresholds with laser contrast measurements. The results demonstrate the relevance of the laser pulse duration dependence of LIB for high-intensity laser-solid interactions. We provide an effective approach to determine the onset of LIB and thereby the starting point of target pre-expansion in other laser-target systems.

Keywords: High intensity laser-plasma interactions; High-energy-density plasmas; Laser driven ion acceleration; Laser-plasma interactions; Plasma production and heating by laser beams; Femtosecond laser irradiation; Laser ablation; Optical plasma measurements; Photoionization; Ultrafast femtosecond pump probe

Involved research facilities

  • Draco


Years: 2023 2022 2021 2020 2019 2018 2017 2016 2015