Original title: Laser-driven ablation through fast electrons in PALS experiment
Authors: Gus'kov, S. Yu. ; Chodukowski, T. ; Demchenko, N. ; Kalinowska, Z. ; Kasperczuk, A. ; Krouský, Eduard ; Pfeifer, Miroslav ; Pisarczyk, P. ; Pisarczyk, T. ; Renner, Oldřich ; Skála, Jiří ; Šmíd, Michal ; Ullschmied, Jiří
Document type: Papers
Conference/Event: International Conference on Inertial Fusion Sciences and Applications /8./, IFSA, Nara (JP), 20130908
Year: 2016
Language: eng
Abstract: Energy transfer to shock wave in Al and Cu targets irradiated by a laser pulse with intensity of I~1-50 PW/cm2 and duration of 250 ps was investigated at Prague Asterix Laser System (PALS). The iodine laser provided energy in the range of 100-600 J at the first and third harmonic frequencies. The focal spot radius of laser beam on the target was varied from 160 to 40 µm. The dominant contribution of fast electron energy transfer into the ablation process was found when using the first harmonic radiation, the focal spot radius of 40-100 µm, and the energy of 300-600 J. The fast electron heating results in the growth of ablation pressure from 60 Mbar at the intensity of 10 PW/cm2 to 180 Mbar at the intensity of 50 PW/cm2 and in the growth of the efficiency of the energy conversion into the shock wave from 2 to 7 % under the conditions of 2D ablation.
Keywords: ablation pressure; laser-produced plasma
Project no.: CZ.1.07/2.3.00/20.0279, EE2.3.20.0279, M100101208
Funding provider: LaserZdroj (OP VK 3), GA MŠk, AVČR
Host item entry: Journal of Physics: Conference series, ISSN 1742-6588

Institution: Institute of Physics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0282223

Permalink: http://www.nusl.cz/ntk/nusl-373347


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