Recent results from experimental studies on laser-plasma coupling in a shock ignition relevant regime

0425426 - FZÚ 2014 RIV GB eng J - Journal Article
Koester, P. - Antonelli, L. - Atzeni, S. - Badziak, J. - Baffigi, F. - Batani, D. - Cecchetti, C.A. - Chodukowski, T. - Consoli, F. - Cristoforetti, G. - De Angelis, R. - Folpini, G. - Gizzi, L.A. - Kalinowska, Z. - Krouský, Eduard - Kuchařík, M. - Labate, L. - Levato, T. - Liška, R. - Malka, G. - Maheut, Y. - Marocchino, A. - Nicolai, P. - O´Dell, T. - Parys, P. - Pisarczyk, T. - Rączka, P. - Renner, Oldřich - Rhee, Y.-J. - Ribeyre, X. - Richetta, M. - Rosinski, M. - Ryc, L. - Skála, Jiří - Schiavi, A. - Schurtz, G. - Šmíd, Michal - Spindloe, C. - Ullschmied, Jiří - Wolowski, J. - Zaras, A.
Recent results from experimental studies on laser-plasma coupling in a shock ignition relevant regime.
Plasma Physics and Controlled Fusion. Roč. 55, č. 12 (2013), , "124045-1"-"124045-8". ISSN 0741-3335. E-ISSN 1361-6587
R&D Projects: GA MŠMT(CZ) LC528; GA MŠMT LM2010014
EU Projects: European Commission(XE) 284464 - LASERLAB-EUROPE
Institutional support: RVO:68378271 ; RVO:61389021
Keywords : laser-produced plasmas * inertial confinement fusion * shock ignition * X-ray imaging spectroscopy * ion diagnostics * interferometry * shock breakout chron
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 2.386, year: 2013

Laser–plasma coupling in a shock ignition relevant regime was studied. A strong shock was launched by irradiation the layered targets at various delays with respect to the first beam. Pre-plasma and fast electron production was characterized using x-ray spectroscopy, ion diagnostics, interferometry and imaging. Information on the shock pressure was obtained using shock breakout chronometry and measurements of the craters produced in a massive target. Preliminary results show that the backscattered energy is in the range 3–15%, mainly due to backscattered light at the laser wavelength (438 nm), which increases with increasing delay between the two laser beams. The values of the peak shock pressures inferred from the shock breakout times are lower than expected from 2D numerical simulations. The same simulations reveal that 2D effects play a major role in experiments with the laser spot size comparable with the distance between critical and ablation layers.
Permanent Link: http://hdl.handle.net/11104/0231305