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Simulation of electron post-acceleration in a two-stage laser Wakefield accelerator

  • Author(s): Reitsma, A.J.W.
  • Leemans, W.P.
  • Esarey, E.
  • Kamp, L.P.J.
  • Schep, T.J.
  • et al.
Abstract

Electron bunches produced in self-modulated laser wakefield experiments usually have a broad energy spectrum, with most electrons at low energy (1-3 MeV) and only a small fraction at high energy. We propose and investigate further acceleration of such bunches in a channel-guided resonant laser wakefield accelerator. Two-dimensional simulations with and without the effects of self-consistent beam loading are performed and compared. These results indicate that it is possible to trap about 40% of the injected bunch charge and accelerate this fraction to an average energy of about 50 MeV in a plasma channel of a few mn.

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