Nonlinear laser driven donut wakefields for positron and electron acceleration

Abstract

We show analytically and through three-dimensional particle-in-cell simulations that non-linear wakefields driven by Laguerre-Gaussian laser pulses can lead to hollow electron self-injection and positron acceleration. We find that higher order lasers can drive donut shaped blowout wakefields with strong positron accelerating gradients comparable to those of a spherical bubble. Corresponding positron focusing forces can be more than an order of magnitude stronger than electron focusing forces in a spherical bubble. Required laser intensities and energies to reach the non-linear donut shaped blowout are within state-of-the-art experimental conditions.

12 pages; submitted for publication

References in corpus (1)

• Generating multi-GeV electron bunches using single stage laser wakefield acceleration in a 3D nonlinear regime

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