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Ultrahigh Brilliance Multi-MeV γ-Ray Beams from Nonlinear Relativistic Thomson Scattering

  • G. Sarri*
  • , D. J. Corvan
  • , W. Schumaker
  • , J. M. Cole
  • , A. Di Piazza
  • , H. Ahmed
  • , C. Harvey
  • , C. H. Keitel
  • , K. Krushelnick
  • , S. P. D. Mangles
  • , Z. Najmudin
  • , D. Symes
  • , A. G. R Thomas
  • , M. Yeung
  • , Z. Zhao
  • , M. Zepf
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We report on the generation of a narrow divergence (θγ<2.5mrad), multi-MeV (Emax≈18MeV) and ultrahigh peak brilliance (>1.8×1020photonss-1mm-2mrad-2 0.1% BW) γ-ray beam from the scattering of an ultrarelativistic laser-wakefield accelerated electron beam in the field of a relativistically intense laser (dimensionless amplitude a0≈2). The spectrum of the generated γ-ray beam is measured, with MeV resolution, seamlessly from 6 to 18 MeV, giving clear evidence of the onset of nonlinear relativistic Thomson scattering. To the best of our knowledge, this photon source has the highest peak brilliance in the multi-MeV regime ever reported in the literature.

Original languageEnglish
Article number224801
Number of pages5
JournalPhysical Review Letters
Volume113
Issue number22
DOIs
Publication statusPublished - 25 Nov 2014

ASJC Scopus subject areas

  • General Physics and Astronomy

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