Lawrence Berkeley National Laboratory
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.
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.