Characterization of hot electrons generated by laser-plasma interaction at shock ignition intensities

0584077 - ÚFP 2024 RIV US eng J - Journal Article
Filippov, E.D. - Khan, M. - Tentori, A. - Gajdoš, Pavel - Martynenko, A.S. - Dudžák, Roman - Koester, P. - Zeraouli, G. - Mancelli, D. - Baffigi, F. - Gizzi, L.A. - Pikuz, S.A. - Nicolaï, Ph.D. - Woolsey, N.C. - Fedosejevs, R. - Krůs, Miroslav - Juha, L. - Batani, D. - Renner, Oldřich - Cristoforetti, G.
Characterization of hot electrons generated by laser-plasma interaction at shock ignition intensities.
Matter and Radiation at Extremes. Roč. 8, č. 6 (2023), č. článku 065602. ISSN 2468-2047. E-ISSN 2468-080X
R&D Projects: GA MŠMT(CZ) LM2023068
EU Projects: European Commission(BE) 101052200
Institutional support: RVO:61389021
Keywords : hot electrons * laser-plasma interaction * shock ignition
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 5.1, year: 2022
Method of publishing: Open access
https://pubs.aip.org/aip/mre/article/8/6/065602/2910921/Characterization-of-hot-electrons-generated-by

In an experiment carried out at the Prague Asterix Laser System at laser intensities relevant to shock ignition conditions (I > 1016 W/cm2), the heating and transport of hot electrons were studied by using several complementary diagnostics, i.e., Kα time-resolved imaging, hard x-ray filtering (a bremsstrahlung cannon), and electron spectroscopy. Ablators with differing composition from low Z (parylene N) to high Z (nickel) were used in multilayer planar targets to produce plasmas with different coronal temperature and collisionality and modify the conditions of hot-electron generation. The variety of available diagnostics allowed full characterization of the population of hot electrons, retrieving their conversion efficiency, time generation and duration, temperature, and angular divergence. The obtained results are shown to be consistent with those from detailed simulations and similar inertial confinement fusion experiments. Based on the measured data, the advantages, reliability, and complementarity of the experimental diagnostics are discussed.
Permanent Link: https://hdl.handle.net/11104/0352082