Conference Paper Generation of GeV Photons from X-ray Free Electron Laser Oscillators

羽島, 良一  ,  羽島  ,  藤原, 守

We propose generation of narrow-bandwidth GeV photons, gamma-rays, via Compton scattering of hard X-ray photons in X-ray free-electron laser oscillators.The gamma-rays have a narrow-bandwidth spectrum with a sharp peak, ~0.1% (FWHM), due to the nature of Compton scattering in relativistic regime.Such gamma-rays will be a unique probe for studying hadron physics.We discuss features of the gamma-ray source, flux, spectrum, polarization, tunability and energy resolution.

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