Abstract
Two-dimensional particle-in-cell simulations for laser plasma interaction with laser intensity of , plasma density range of , and scale length of showed significant pump depletion of the laser energy due to stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS) in the low-density region (). The simulations identified hot electrons generated by SRS in the low-density region with moderate energy and by two-plasmon-decay near with higher energy. The overall hot electron temperature (46 keV) and conversion efficiency (3%) were consistent with the experiment's measurements. The simulations also showed artificially reducing SBS would lead to stronger SRS and a softer hot-electron spectrum.
- Received 10 January 2019
- Revised 16 September 2019
- Accepted 9 January 2020
DOI:https://doi.org/10.1103/PhysRevE.101.033206
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