Quasimonoenergetic electron acceleration in the self-modulated laser wakefield regime

Hidding, B.; Geissler, M.; Pretzler, G.; Amthor, K.-U.; Schwoerer, H.; Karsch, S.; Veisz, L.; Schmid, K.; Sauerbrey, R.
April 2009
Physics of Plasmas;Apr2009, Vol. 16 Issue 4, p043105
Academic Journal
Details on the generation of (multiple) quasimonoenergetic electron bunches in the self-modulated laser wakefield acceleration (SMLWFA) regime are presented. This type of laser-plasma interaction can result in pronounced longitudinal laser pulse fragmentation, dependent on plasma density and laser intensity. It is shown by experiments and particle-in-cell simulations that these laser pulse fragments can be powerful enough to trigger nonlinear plasma wave breaking, injection, and acceleration of electrons to quasimonoenergetic energies. With high plasma densities, self-modulation is promoted, and the advantages of SMLWFA such as especially high accelerating fields and short electron bunches (<5 fs) can be harvested. In addition, more than one quasimonoenergetic electron bunch can be created, with a temporal spacing between each bunch of only few tens of femtoseconds, again governed by plasma density.


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