Physics of shock-wave generation by laser plasma in water confinement regime

Laurent Berthe; Arnault Sollier; Patrice Peyre; Christelle Carboni; Eric Bartnicki; Remy Fabbro

doi:10.1117/12.407374

16 August 2000 Physics of shock-wave generation by laser plasma in water confinement regime

Laurent Berthe, Arnault Sollier, Patrice Peyre, Christelle Carboni, Eric Bartnicki, Remy Fabbro

Proceedings Volume 4065, High-Power Laser Ablation III; (2000) https://doi.org/10.1117/12.407374
Event: High-Power Laser Ablation, 2000, Santa Fe, NM, United States

Abstract

The laser interaction in water confinement regime has been studied experimentally by reflectivity and ablated thickness measurements with a 3 ns squared laser pulse and 15 Gaussian laser pulse at 1.064 micrometer. Depending on laser pulse duration, the absorption of the confined plasma is 80 - 90%. The ablated thickness equals to 1.1 micrometer and 0.75 micrometer, for the 3 ns squared pulse at 20 GW/cm² and the 15 ns Gaussian pulses at 1 GW/cm² respectively. The plasma parameters have been evaluated from experimental results and new developments of the description of the confined interaction. The density range of heavy particles is 3.4 - 4.6 10²¹ cm^-3, the degree of ionization 0.39 - 1.3, the temperature 1.7 - 4.0 eV. Numerical results agree with previous experimental results. The range of coupling parameter of these confined plasmas, which is 0.2 - 1, allows to classify them in strongly coupled plasmas.

Citation Download Citation

Laurent Berthe, Arnault Sollier, Patrice Peyre, Christelle Carboni, Eric Bartnicki, and Remy Fabbro "Physics of shock-wave generation by laser plasma in water confinement regime", Proc. SPIE 4065, High-Power Laser Ablation III, (16 August 2000); https://doi.org/10.1117/12.407374

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