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

Sarri, G.; Corvan, D. J.; Schumaker, W.; Cole, J.; Di Piazza, Antonino; Ahmed, H.; Harvey, C.; Keitel, Christoph H.; Krushelnick, K.; Mangles, S. P. D.; Najmudin, Z.; Symes, D.; Thomas, A. G. R.; Yeung, M.; Zhao, Z.; Zepf, M.

doi:10.1103/PhysRevLett.113.224801

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

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Di Piazza, Antonino
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Keitel, Christoph H.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Citation

Sarri, G., Corvan, D. J., Schumaker, W., Cole, J., Di Piazza, A., Ahmed, H., et al. (2014). Ultrahigh Brilliance Multi-MeV γ-Ray Beams from Nonlinear Relativistic Thomson Scattering. Physical Review Letters, 113(22): 224801. doi:10.1103/PhysRevLett.113.224801.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-4213-7

Abstract

We report on the generation of a narrow divergence (θ_γ <2.5 mrad), multi-MeV (Emax≈18 MeV) and ultrahigh peak brilliance (>1.8×10²⁰ photons s⁻¹ mm⁻² mrad⁻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.