Study of shock waves generation, hot electron production and role of parametric instabilities in an intensity regime relevant for the shock ignition

0487491 - FZÚ 2018 RIV GB eng C - Conference Paper (international conference)
Antonelli, L. - Köster, P. - Folpini, G. - Maheut, Y. - Baffigi, F. - Cristoforetti, G. - Labate, L. - Levato, Tadzio - Gizzi, L.A. - Consoli, F. - De Angelis, R. - Kalinowska, Z. - Chodukowski, T. - Rosinski, M. - Parys, P. - Pisarczyk, T. - Raczka, P. - Ryć, L. - Badziak, J. - Wolowski, J. - Šmíd, Michal - Renner, Oldřich - Krouský, Eduard - Pfeifer, Miroslav - Skála, Jiří - Ullschmied, Jiří - Nicolai, P. - Ribeyre, X. - Shurtz, G. - Atzeni, S. - Marocchino, A. - Schiavi, A. - Spindloe, C. - O'Dell, T. - Rhee, Y.-J. - Richetta, M. - Batani, D.
Study of shock waves generation, hot electron production and role of parametric instabilities in an intensity regime relevant for the shock ignition.
Journal of Physics: Conference series. Vol. 688. Bristol: IOP Publishing Ltd., 2016, s. 1-4, č. článku 012003. ISSN 1742-6588.
[International Conference on Inertial Fusion Sciences and Applications /8./, IFSA. Nara (JP), 08.09.2013-13.09.2013]
Institutional support: RVO:68378271 ; RVO:61389021
Keywords : laser-produced plasma * shock ignition
OECD category: Fluids and plasma physics (including surface physics)

We present experimental results at intensities relevant to Shock Ignition obtained at the sub-ns Prague Asterix Laser System in 2012. We used X-ray spectroscopy of Cl to evaluate the plasma temperature, K imaging and spectroscopy to evaluate spatial and spectral properties of the fast electrons and a streak camera for shock breakout measurements. Parametric instabilities (Stimulated Raman Scattering, Stimulated Brillouin Scattering and Two Plasmon Decay) were studied by collecting the back scattered light and analysing its spectrum. Back scattered energy was measured with calorimeters. To evaluate the maximum pressure reached in our experiment we performed hydro simulations with CHIC and DUED codes. The maximum shock pressure generated in our experiment at the front side of the target during laser-interaction is 90 Mbar. The conversion efficiency into hot electrons was estimated to be of the order of 0.1% and their mean energy in the order ~50 keV.

Permanent Link: http://hdl.handle.net/11104/0282153