@inproceedings{oai:repo.qst.go.jp:00054662,
 author = {羽島, 良一 and 羽島 and 藤原, 守 and 羽島 良一 and 藤原 守},
 book = {Proceedings of the 7th International Particle Accelerator Conference},
 month = {Jul},
 note = {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.},
 pages = {751--753},
 title = {Generation of GeV Photons from X-ray Free Electron Laser Oscillators},
 year = {2016}
}