Quasimonoenergetic electron beams produced by colliding cross-polarized laser pulses in underdense plasmas

Details Quasimonoenergetic electron beams produced by colliding cross-polarized laser pulses in underdense plasmas Quasimonoenergetic electron beams produced by colliding cross-polarized laser pulses in underdense plasmas

2008-09-12

arxiv.org/abs/0809.2224v1

New J.Phys.11:013011,2009

Physics

Plasma Physics

4 pages, 4 figures

Scientific paper

10.1088/1367-2630/11/1/013011

The interaction of two laser pulses in an underdense plasma has proven to be able to inject electrons in plasma waves, thus providing a stable and tunable source of electrons. Whereas previous works focused on the "beatwave" injection scheme in which two lasers with the same polarization collide in a plasma, this present letter studies the effect of polarization and more specifically the interaction of two colliding cross-polarized laser pulses. It is shown both theoretically and experimentally that electrons can also be pre-accelerated and injected by the stochastic heating occurring at the collision of two cross-polarized lasers and thus, a new regime of optical injection is demonstrated. It is found that injection with cross-polarized lasers occurs at higher laser intensities.

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