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Generation of 20 kA electron beam from a laser wakefield accelerator

Physics of Plasmas, ISSN: 1089-7674, Vol: 24, Issue: 2
2017
  • 44
    Citations
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  • 57
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Metrics Details

  • Citations
    44
    • Citation Indexes
      44
  • Captures
    57

Article Description

We present the experimentally generated electron bunch from laser-wakefield acceleration (LWFA) with a charge of 620 pC and a maximum energy up to 0.6 GeV by irradiating 80 TW laser pulses at a 3 mm Helium gas jet. The charge of injected electrons is much larger than the normal scaling laws of LWFA in bubble regime. We also got a quasi-monoenergetic electron beam with energy peaked at 249 MeV and a charge of 68 pC with the similar laser conditions but lower plasma density. As confirmed by 2D particle-in-cell simulations, the boosted bunch charge is due to the continuous injection caused by the self-steepening and self-compression of a laser pulse. During the nonlinear evolution of the laser pulse, the bubble structure broadens and stretches, leading to a longer dephasing length and larger beam charge.

Bibliographic Details

Y. F. Li; K. Huang; M. Z. Tao; M. H. Li; J. R. Zhao; Y. Ma; X. Guo; J. G. Wang; L. M. Chen; D. Z. Li; M. Chen; N. Hafz; J. Zhang

AIP Publishing

Physics and Astronomy

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