Multi-dimensional PIC-simulations of parametric instabilities for shock-ignition conditions
1 LULI, Université Pierre et Marie Curie, 75005 Paris, France
2 FNSPE, Czech Technical University, 11519 Prague, Czech Republic
3 CPHT, Ecole Polytechnique, 91128 Palaiseau, France
4 CELIA, Université Bordeaux 1, 33405 Talence, France
a e-mail: email@example.com
Published online: 15 November 2013
Laser-plasma interaction is investigated for conditions relevant for the shock-ignition (SI) scheme of inertial confinement fusion using two-dimensional particle-in-cell (PIC) simulations of an intense laser beam propagating in a hot, large-scale, non-uniform plasma. The temporal evolution and interdependence of Raman- (SRS), and Brillouin- (SBS), side/backscattering as well as Two-Plasmon-Decay (TPD) are studied. TPD is developing in concomitance with SRS creating a broad spectrum of plasma waves near the quarter-critical density. They are rapidly saturated due to plasma cavitation within a few picoseconds. The hot electron spectrum created by SRS and TPD is relatively soft, limited to energies below one hundred keV.
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