Laser-driven ablation through fast electrons in PALS experiment at the laser radiation intensity of 1–50 PW/cm2

0439503 - FZÚ 2015 RIV US eng J - Journal Article
Gus’kov, S.Yu. - Demchenko, N. N. - Kasperczuk, A. - Pisarczyk, T. - Kalinowska, Z. - Chodukowski, T. - Renner, Oldřich - Šmíd, Michal - Krouský, Eduard - Pfeifer, Miroslav - Skála, Jiří - Ullschmied, Jiří - Pisarczyk, P.
Laser-driven ablation through fast electrons in PALS experiment at the laser radiation intensity of 1–50 PW/cm2.
Laser and Particle Beams. Roč. 32, č. 1 (2014), s. 177-195. ISSN 0263-0346. E-ISSN 1469-803X
R&D Projects: GA MŠMT LM2010014; GA MŠMT EE2.3.20.0279
EU Projects: European Commission(XE) 284464 - LASERLAB-EUROPE
Grant - others:AVČR(CZ) M100101208; LaserZdroj (OP VK 3)(XE) CZ.1.07/2.3.00/20.0279
Institutional support: RVO:68378271 ; RVO:61389021
Keywords : inertial confinement fusion * shock ignition * laser-produced plasma * three-frame interferometry * X-ray spectroscopy * fast electron generation
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 1.295, year: 2014

The paper is directed to the study of high-temperature plasma and ablation plasma formation as well as efficiency of the laser energy transfer to solid targets irradiated by laser pulses at conditions corresponding to the characteristics of the laser spike designed to generate the igniting shock wave in the shock ignition concept. The experiments have been performed at PALS. The iodine laser delivered 250 ps (FWHM) pulses with the energy in the range of 100–600 J at the 1. and 3. harmonic frequencies.The diagnostic data collected using three-frame interferometry, X-ray spectroscopy, and crater replica technique were interpreted by two-dimensional numerical and analytical modeling which included generation and transport of fast electrons. The dominant contribution of fast electron energy transfer into the ablation process and shock wave generation was found when using the 1. harmonic laser radiation, the focal spot radius of 40–100 μm, and the laser energy of 300–600 J.
Permanent Link: http://hdl.handle.net/11104/0242779