Raman forward scattering of short-pulse high-intensity lasers

TLDR

Raman forward scattering of short‑pulse relativistic‑intensity laser pulses is investigated, and its relevance to current experiments and the limitations of quasistatic equations are discussed. The study derives differential equations modeling Raman forward scattering instability for arbitrarily large pump strengths. The authors derive differential equations that model the instability across arbitrarily large pump strengths. Exact solutions for physically relevant initial conditions are obtained, revealing that the growth rate asymptotically approaches zero at ultrarelativistic laser intensities.

Abstract

Raman forward scattering of short-pulse relativistic-intensity laser pulses is investigated. Differential equations which model the instability for arbitrarily large pump strengths are derived. Exact solutions are obtained for a set of physically relevant initial conditions. The growth rate is found to asymptotically approach zero for ultrarelativistic laser intensities. The relevance of the results to present experiments and the limitations of the quasistatic equations are discussed