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Demonstration of a positron beam-driven hollow channel plasma wakefield accelerator

Author

Listed:
  • Spencer Gessner

    (SLAC National Accelerator Laboratory)

  • Erik Adli

    (University of Oslo)

  • James M. Allen

    (SLAC National Accelerator Laboratory)

  • Weiming An

    (University of California–Los Angeles
    University of California–Los Angeles)

  • Christine I. Clarke

    (SLAC National Accelerator Laboratory)

  • Chris E. Clayton

    (University of California–Los Angeles)

  • Sebastien Corde

    (LOA, ENSTA ParisTech, CNRS, Ecole Polytechnique, Université Paris-Saclay)

  • J. P. Delahaye

    (SLAC National Accelerator Laboratory)

  • Joel Frederico

    (SLAC National Accelerator Laboratory)

  • Selina Z. Green

    (SLAC National Accelerator Laboratory)

  • Carsten Hast

    (SLAC National Accelerator Laboratory)

  • Mark J. Hogan

    (SLAC National Accelerator Laboratory)

  • Chan Joshi

    (University of California–Los Angeles)

  • Carl A. Lindstrøm

    (University of Oslo)

  • Nate Lipkowitz

    (SLAC National Accelerator Laboratory)

  • Michael Litos

    (SLAC National Accelerator Laboratory)

  • Wei Lu

    (IFSA Collaborative Innovation Center, Tsinghua University)

  • Kenneth A. Marsh

    (University of California–Los Angeles)

  • Warren B. Mori

    (University of California–Los Angeles
    University of California–Los Angeles)

  • Brendan O’Shea

    (SLAC National Accelerator Laboratory)

  • Navid Vafaei-Najafabadi

    (University of California–Los Angeles)

  • Dieter Walz

    (SLAC National Accelerator Laboratory)

  • Vitaly Yakimenko

    (SLAC National Accelerator Laboratory)

  • Gerald Yocky

    (SLAC National Accelerator Laboratory)

Abstract

Plasma wakefield accelerators have been used to accelerate electron and positron particle beams with gradients that are orders of magnitude larger than those achieved in conventional accelerators. In addition to being accelerated by the plasma wakefield, the beam particles also experience strong transverse forces that may disrupt the beam quality. Hollow plasma channels have been proposed as a technique for generating accelerating fields without transverse forces. Here we demonstrate a method for creating an extended hollow plasma channel and measure the wakefields created by an ultrarelativistic positron beam as it propagates through the channel. The plasma channel is created by directing a high-intensity laser pulse with a spatially modulated profile into lithium vapour, which results in an annular region of ionization. A peak decelerating field of 230 MeV m−1 is inferred from changes in the beam energy spectrum, in good agreement with theory and particle-in-cell simulations.

Suggested Citation

  • Spencer Gessner & Erik Adli & James M. Allen & Weiming An & Christine I. Clarke & Chris E. Clayton & Sebastien Corde & J. P. Delahaye & Joel Frederico & Selina Z. Green & Carsten Hast & Mark J. Hogan , 2016. "Demonstration of a positron beam-driven hollow channel plasma wakefield accelerator," Nature Communications, Nature, vol. 7(1), pages 1-6, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11785
    DOI: 10.1038/ncomms11785
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