Direct laser acceleration of electrons in the plasma bubble by tightly focused laser pulses

  title={Direct laser acceleration of electrons in the plasma bubble by tightly focused laser pulses},
  author={Tianhong Wang and Vladimir N. Khudik and Alexey V. Arefiev and Gennady Shvets},
  journal={Physics of Plasmas},
We present an analytical theory that reveals the importance of the longitudinal laser electric field in the course of the resonant acceleration of relativistic electrons by a tightly confined laser beam. It is shown that this laser field component always counteracts the transverse one and effectively decreases the final energy gain of electrons via the direct laser acceleration (DLA) mechanism. This effect is demonstrated by carrying out particle-in-cell simulations of the DLA of the electrons… 
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