Development of a high-brightness photoinjector for Compton scattering x-ray sources

ORAL

Abstract

Compton scattering of intense laser pulses with ultra-relativistic electron beams has proven to be an attractive source of high-brightness x-rays with keV to MeV energies. This type of x-ray source requires the electron beam brightness to be comparable with that used in x-ray free-electron lasers and laser and plasma based advanced accelerators. We describe the development of a 1.6 cell RF photoinjector for use in Compton scattering experiments at LLNL. RF cavity design, beam dynamics simulations, emittance diagnostic development, and results of sputtered magnesium photo-cathode experiments are discussed. The photo-cathode drive laser is described and injector performance goals are presented.

*This work was performed under the auspices of the U.S. Department of Energy by University of California Lawrence Livermore National Laboratory under contract No. W-7405-Eng-48.

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Authors

  • Scott Anderson

  • David J. Gibson

  • Frederic Hartemann

  • Aaron Tremaine

    • Lawrence Livermore National Laboratory

  • Hristo Badakov

  • Pedro Frigola

  • Brendan O'Shea

  • James Rosenzweig

    • University of California, Los Angeles

  • Christopher Barty

    • Lawrence Livermore National Laboratory