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

Abstract : The interaction of two laser pulses in an underdense plasma has been proven to be able to inject electrons into 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 paper 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 preaccelerated 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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Submitted on : Monday, July 12, 2010 - 10:22:29 AM
Last modification on : Wednesday, July 3, 2019 - 10:48:01 AM

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Clément Rechatin, Jérôme Faure, Augustin Lifschitz, Xavier Davoine, E. Lefebvre, et al.. Quasi-monoenergetic electron beams produced by colliding cross-polarized laser pulses in underdense plasmas. New Journal of Physics, Institute of Physics: Open Access Journals, 2009, 11 (1), pp.013011. ⟨10.1088/1367-2630/11/1/013011⟩. ⟨hal-00501486⟩

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