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Near-microcoulomb multi-MeV electrons generation in laser-driven self-formed plasma channel

  • Y. Yang (a1), J. Jiao (a1), C. Tian (a1), Y. Wu (a1) (a2), K. Dong (a1), W. Zhou (a1) (a2), Y. Gu (a1) (a2) and Z. Zhao (a1) (a2)...


The origin and characteristics of near-microcoulomb multi-MeV electrons accelerated by short pulse lasers interacting with near-critical density plasma in self-formed channels are studied using three-dimensional particle-in-cell simulations. According to the analysis on interaction phenomena and electron dynamics, the dominant mechanism turns out to be direct laser acceleration, which ensures the outstanding energy coupling. Additionally, self-channeling is found to be a decisive factor for the acceleration performance, as electrons obtain ultra-high energy through betatron resonance inside the channels. In our findings, by using a relativistic short laser pulse and near-critical plasma, a large amount of energetic electrons can be generated, presenting a promising and accessible route to ultraintense, high-spatial-resolution radiation pulses.


Corresponding author

Address correspondence and reprint requests to: Z. Zhao, Science and Technology on Plasma Physics Laboratory, Laser Fusion Research Center, China Academy of Engineering Physics, P.O. Box 919-986, Mianyang 621900, People's Republic of China. E-mail:


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