Creation of an axially uniform plasma channel in a laser-assisted capillary discharge

Dissipative capillary discharges form plasma channels which allow for high power laser guiding, enabling efficient electron acceleration in a wakefield accelerator. However, at the low densities required to produce high-energy electrons, order avoid wall damage, lasers need tighter transverse confinement that cannot be achieved by discharge powered Ohmic heating alone. The introduction of an additional leads deeper and narrower channels. Here we investigate formation laser-heated axially uniform We show degree longitudinal uniformity can despite significant evolution heater during its propagation through channel.