Ultra-high brilliance multi-MeV $\gamma$-ray beam from non-linear Thomson scattering

Abstract

We report on the generation of a narrow divergence ($\theta \approx 2.5$ mrad), multi-MeV ($E_{\text{MAX}}=18$ MeV) and ultra-high brilliance ($\approx 2\times 10^{19}$ photons s${}^{-1}$ mm${}^{-2}$ mrad ${}^{-2}$ 0.1\% BW) $\gamma$-ray beam from the scattering of an ultra-relativistic laser-wakefield accelerated electron beam in the field of a relativistically intense laser (dimensionless amplitude $a_0\approx 2$). The spectrum of the generated $\gamma$-ray beam is measured, with MeV resolution, seamlessly from 6 MeV to 18 MeV, giving clear evidence of the onset of non-linear Thomson scattering. The photon source has the highest brilliance in the multi-MeV regime ever reported in the literature.

References in corpus (4)

• Extremely high-intensity laser interactions with fundamental quantum systems
• Femtosecond x rays from laser-plasma accelerators
• All-optical Compton gamma-ray source
• Design of a Compact Spectrometer for High-Flux MeV Gamma-Ray Beams

Cited by in corpus (80)

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• Highly efficient laser-driven Compton gamma-ray source
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• Identifying the electron-positron cascade regimes in high-intensity laser-matter interactions
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