Laser-driven Plasma Wakefield: Propagation Effects

Abstract

In the frame of laser-driven wakefield acceleration, the main characteristics of laser propagation and plasma wave excitation are described, with an emphasis on the role of propagation distance for electron acceleration. To optimize interaction length and maximize energy gain, operation at low plasma density is the most promising regime for achieving ultra-relativistic energies. Among the possible methods of extending propagation length at low plasma density, laser guiding by grazing incidence reflection at the wall of dielectric capillary tubes has several assets. The properties of laser guiding and the measurement of plasma waves over long distances are presented.