Passive Plasma Lens Experiments at FACET-II

Oral-In-person

Abstract

Plasma lenses play a crucial role in the staging of plasma wakefield accelerators by providing compact, high-gradient focusing. We demonstrate a laser-ionized, beam-driven passive plasma lens (PPL) at SLAC's FACET-II facility. The PPL is formed by laser ionization transverse to the electron beam propagation, resulting in a lens with a sub-millimeter footprint along the beamline. The peak equivalent quadrupole gradient exceeds 0.3 MT/m, several orders of magnitude stronger than conventional magnetic optics. The measured beta function is reduced by more than an order of magnitude, reaching a minimum below 5 cm. Such a strong reduction in beta function demonstrates that the PPL provides the necessary focusing for efficient beam matching into a plasma wakefield accelerator, enabling emittance preservation of the accelerated electron bunch.

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Presenters

  • Shutang Meng

    • University of Colorado, Boulder

Authors

  • Shutang Meng

    • University of Colorado, Boulder

  • Robert Ariniello

    • Xcimer Energy

  • Sebastien Corde

    • LOA, ENSTA Paris, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris

  • Christopher Doss

    • Lawrence Berkeley National Laboratory

  • Thamine Dalichaouch

    • University of California, Los Angeles

  • Claudio Emma

    • SLAC National Accelerator Laboratory

  • Spencer Gessner

    • SLAC National Accelerator Laboratory

  • Claire Hansel

    • University of Colorado, Boulder

  • Mark Hogan

    • SLAC National Accelerator Laboratory

  • Chandrashekhar Joshi

    • University of California, Los Angeles

  • Alexander Knetsch

    • SLAC National Accelerator Laboratory

  • Valentina Lee

    • University of Colorado Boulder

  • Nathan Majernik

    • SLAC National Accelerator Laboratory

  • Kenneth Marsh

    • University of California, Los Angeles

  • Brendan O'Shea

    • SLAC National Accelerator Laboratory

  • Elena Ros

    • University of Colorado, Boulder

  • Douglas Storey

    • SLAC National Accelerator Laboratory

  • Chaojie Zhang

    • University of California, Los Angeles

  • Michael Litos

    • University of Colorado, Boulder