2026/08/05 by Xinlu Xu, Warren Mori
Physics and Astronomy · #physics.plasm-ph #physics.acc-ph
10 pages, 1 figure
arxiv created 2026/08/05 · arxiv updated 2026/08/06
It is shown that the convective gain of Stimulated Raman Backscatter (SRBS) within a single laser wavelength in the strongly coupled regime is equivalent to the Pierce parameter commonly used to describe high gain x-ray Free Electron Lasers (XFELs). The comparison utilizes the fact that the gain is a Lorentz invariant so the Pierce parameter is written in terms of the FEL parameters in the electron beam's rest frame. It is thus inferred that there is a direct correspondence of the physics between SRBS in the strong-coupled regime and high gain XFELs in the Compton regime.