Plasma Dark Current in Plasma Wake Field Accelerators (PWFA)

POSTER

Abstract

Evidence of particle trapping has been observed in a beam driven Plasma Wake Field Accelerator (PWFA) experiment, E164X, conducted at the Stanford Linear Accelerator Center. Trapped electrons are observed when the wake field amplitude is above a certain threshold. Trapped electrons in plasma accelerators are the equivalent of the dark current in RF accelerators. Calculations show that the trapping threshold is lower in the case of a plasma field ionized by the electron bunch itself than in a pre-ionized plasma. Experimental and simulation results will be presented.

Authors

  • Erdem Oz

  • Tom Katsouleas

    • University of Southern California

  • Patric Muggli

    • USC

  • Christopher Barnes

  • Franz Josef Decker

  • Paul J. Emma

  • Mark J. Hogan

  • Rasmus Ischebeck

    • Stanford Linear Accelerator Center
    • SLAC

  • Devon K. Johnson

  • Chris Clayton

    • UCLA

  • Richard H. Iverson

    • SLAC

  • Wei Lu

    • UCLA

  • Robert H. Siemann

  • Chan Joshi

    • SLAC

  • Warren Mori

    • UCLA
    • University of California Los Angeles, CA 90095, U.S.A.
    • Department of Physics and Astronomy and Electrical Engineering, UCLA, Los Angeles, California 90095, USA

  • Dieter Walz

    • SLAC

  • Ken Marsh

  • Chengkun Huang

    • UCLA

  • Patrick Krejcik

    • SLAC

  • Miaomiao Zhou

    • UCLA

  • Caolionn O'Connell

    • SLAC

  • Suzhi Deng

    • USC