Pump depletion and the Raman gap in ignition-scale plasmas.

Cao, S H; Rosenberg, M J; Solodov, A A; Wen, H; Ren, C · Phys Rev E · 2024

basic_science · Level V

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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.