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 language | English |
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Article number | 224801 |
Number of pages | 5 |
Journal | Physical Review Letters |
Volume | 113 |
Issue number | 22 |
DOIs | |
Publication status | Published - 25 Nov 2014 |
ASJC Scopus subject areas
- General Physics and Astronomy