Investigation on the origin of hot electrons in laser plasma interaction at shock ignition intensities

0578753 - FZÚ 2024 RIV US eng J - Journal Article
Cristoforetti, G. - Baffigi, F. - Batani, D. - Dudžák, Roman - Fedosejevs, R. - Filippov, E.D. - Gajdoš, P. - Juha, Libor - Khan, M. - Koester, P. - Krůs, M. - Mancelli, D. - Martynenko, A.S. - Nicolai, P. - Pikuz, S.A. - Renner, Oldřich - Tentori, A. - Volpe, L. - Woolsey, N. - Zeraouli, G. - Gizzi, L.A.
Investigation on the origin of hot electrons in laser plasma interaction at shock ignition intensities.
Scientific Reports. Roč. 13, Nov. (2023), č. článku 20681. ISSN 2045-2322. E-ISSN 2045-2322
R&D Projects: GA MŠMT(CZ) EF18_053/0016627; GA MŠMT(CZ) LM2023068
EU Projects: European Commission(XE) 654148 - LASERLAB-EUROPE
Grant - others:OP VVV - Mobility FZU 2(XE) CZ.02.2.69/0.0/0.0/18_053/0016627
Institutional support: RVO:68378271
Keywords : shock ignition * inertial confinement fusion * strong shock driven by laser pulse * PALS laser facility * hot electrons * laser-plasma interaction
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 4.6, year: 2022
Method of publishing: Open access

Shock Ignition is a two-step scheme to reach Inertial Confinement Fusion, where the precompressed fuel capsule is ignited by a strong shock driven by a laser pulse at an intensity in the order of 10 16 W/cm2 . In this report we describe the results of an experiment carried out at PALS laser facility designed to investigate the origin of hot electrons in laser-plasma interaction at intensities and plasma temperatures expected for Shock Ignition. A detailed time- and spectrally-resolved characterization of Stimulated Raman Scattering and Two Plasmon Decay instabilities, as well as of the generated hot electrons, suggest that Stimulated Raman Scattering is the dominant source of hot electrons via the damping of daughter plasma waves. The temperature dependence of laser plasma instabilities was also investigated, enabled by the use of different ablator materials, suggesting that Two Plasmon Decay is damped at earlier times for higher plasma temperatures.
Permanent Link: https://hdl.handle.net/11104/0347662