Suppression of power losses during laser pulse propagation in underdense plasma slab
Abstract
For current state-of-the-art terawatt lasers, the primary laser scattering mechanisms in plasma include forward Raman scattering (FRS), excitation of plasma waves, and the filamentation instability. Using 2D particle-in-cell (PIC) simulations, we demonstrate that FRS dominates in the regime with medium-to-low density plasma and non-relativistic laser fields. We numerically show that FRS can be suppressed using a two-color laser with frequency detuning exceeding the plasma frequency, Δω>ωpe, leading to a more efficient laser energy transmission. An optimal laser pulse energy redistribution ratio is predicted analytically and verified by PIC simulations.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 01, 2021
- Source ID
- 10.1063/5.0036759
Entities
People
- K. V. Lezhnin
- Kenan Qu
- Nathaniel Fisch
Organizations
- Princeton Plasma Physics Laboratory
- Princeton University