Pump depletion and the Raman gap in ignition-scale plasmas

2024/09/08 by Cao, S. H., Rosenberg, M. J., Solodov, A. A. +2
#FOS: Physical sciences #Plasma Physics (physics.plasm-ph)

paper · doi:10.48550/arxiv.2409.05232

Abstract

Laser-plasma instabilities under ignition conditions for direct-drive inertial confinement fusion are studied using two-dimensional Particle-in-Cell simulations with a combination of in-plane (PP) and out-of-the-plane (SP) lasers. The results show that stimulated Raman side scattering can induce significant pump depletion and form a gap in the Raman scattered light spectra that have been observed in experiments.

Related

• Experimental evidence of stimulated Raman re-scattering in laser-plasma interaction
• Observation and modelling of Stimulated Raman Scattering driven by an optically smoothed laser beam in experimental conditions relevant for Shock Ignition
• Convective Nature of the Stimulated Raman Side Scattering in Inertial Confinement Fusion
• Suppression of stimulated Raman scattering by angularly incoherent light, towards a laser system of incoherence in all dimensions of time, space, and angle
• Inflationary stimulated Raman scattering in shock-ignition plasmas