Laser-driven ablation through fast electrons in PALS experiment

0487563 - FZÚ 2018 RIV GB eng C - Konferenční příspěvek (zahraniční konf.)
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
Laser-driven ablation through fast electrons in PALS experiment.
Journal of Physics: Conference series. Vol. 688. Bristol: IOP Publishing Ltd., 2016, s. 1-4, č. článku 012023. ISSN 1742-6588.
[International Conference on Inertial Fusion Sciences and Applications /8./, IFSA. Nara (JP), 08.09.2013-13.09.2013]
Grant CEP: GA MŠMT EE2.3.20.0279
Grant ostatní: LaserZdroj (OP VK 3)(XE) CZ.1.07/2.3.00/20.0279; AVČR(CZ) M100101208
Institucionální podpora: RVO:68378271 ; RVO:61389021
Klíčová slova: laser-produced plasma * ablation pressure
Obor OECD: Fluids and plasma physics (including surface physics)

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.
Trvalý link: http://hdl.handle.net/11104/0282223