Plasma Dynamics in Capillary Discharges

Sasorov, P. V.

doi:10.1007/978-3-319-73025-7_7

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2021

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“…The results reported in Refs. [4,5] were obtained using capillary discharges operating in the dissipative regime, where the transverse plasma density profile has a minimum on the capillary axis [6,7]. Such plasma profile ensures guided propagation of laser pulses over distances significantly larger than the Rayleigh length.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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

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