Intensity dependence of electron gas kinetics in a laser corona

0433971 - FZÚ 2015 RIV FR eng C - Conference Paper (international conference)
Mašek, Martin - Rohlena, Karel
Intensity dependence of electron gas kinetics in a laser corona.
7th International Conference on Inertial Fusion Sciences and Applications, IFSA 2011. Paris: E D P SCIENCES, 2013 - (Mora, P.; Tanaka, K.; Moses, E.), "05013-1"-"05013-5". EPJ Web of Conferences, 59. ISBN 978-2-7598-1077-2. ISSN 2100-014X.
[International Conference on Inertial Fusion Sciences and Applications, IFSA 2011 /7./. Bordeaux (FR), 12.09.2011-16.09.2011]
R&D Projects: GA MŠMT(CZ) LC528; GA ČR GAP205/11/0571
Institutional support: RVO:68378271
Keywords : laser fusion * plasma * instability
Subject RIV: BL - Plasma and Gas Discharge Physics
http://dx.doi.org/10.1051/epjconf/20135905013

In various experimental situations relevant to the laser fusion a relatively long underdense plasma of corona type is encountered, which is subject to an intense nanosecond laser beam. The plasma is only weakly collisional and thus in the electron phase space a complicated kinetic evolution is going on, which is taking the electron gas fairly far from the thermal equilibrium and contributes to its unstable behaviour. One of the key processes leading to the electron acceleration is the stimulated Raman scattering (SRS). The SRS in the presence of electron-ion collisions requires a certain threshold intensity above which the mentioned non-dissipative phenomena can occur and develop to the stage, where they may become unpleasant for the fusion experiments. The purpose of the present contribution is to map the intensity dependence of this non-linear development with the aim of assessing its weight in fusion relevant situations.
Permanent Link: http://hdl.handle.net/11104/0238123