An analytical optimization of plasma density profiles for downramp injection in laser wake-field acceleration
arXiv:2506.06814 · doi:10.1016/j.physd.2026.135124
Abstract
We propose and detail a multi-step analytical procedure, based on an improved fully relativistic plane model for Laser Wake Field Acceleration, to tailor the initial density of a cold diluted plasma to the laser pulse profile, so as to control and optimize the partial wave-breaking of the plasma wave and maximize the acceleration of small bunches of electrons self-injected by the first wave-breaking at the density down-ramp, at least in the first stages of their acceleration phase. We find an excellent agreement with the results of Particle In Cell simulations obtained with the same input data.
Latex file 34 pages, 15 figures. Final version accepted in Physica D: nonlinear phenomena. Minor typos corrected