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Design of a free-electron laser driven by the LBNL laser-plasma-accelerator

  • Author(s): Schroeder, C.B.
  • Fawley, W.M.
  • Montgomery, A.L.
  • Robinson, K.E.
  • Gruner, F.
  • Bakeman, M.
  • Leemans, W.P.
  • et al.
Abstract

We discuss the design and current status of a compact free-electron laser (FEL), generating ultra-fast, high-peak flux, VUV pulses driven by a high-current, GeV electron beam from the existing Lawrence Berkeley National Laboratory (LBNL) laser-plasma accelerator, whose active acceleration length is only a few cm. The proposed ultra-fast source would be intrinsically temporally synchronized to the drive laser pulse, enabling pump-probe studies in ultra-fast science with pulse lengths of tens of fs. Owing to the high current (& 10 kA) of the laser-plasma-accelerated electron beams, saturated output fluxes are potentially greater than 1013 photons/pulse. Devices based both on SASE and high-harmonic generated input seeds, to reduce undulator length and fluctuations, are considered.

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