Compact hard x-ray source based on the photon storage ring

A compact synchrotron light source, which is composed of an exactly circular electron storage ring, features not only soft x-ray generation but also laser emission as well as hard x-ray generation. An insertion device is not applicable for the exact circular storage ring, since it has no straight section. However an optical resonator installed around the electron orbit functions like an optical undulator. The photon storage ring (PhSR) so named is essentially a free-electron laser. A use of the Compton back scattering enables the PhSR to generate hard x rays. Sizable amount of hard x rays is expected from calculation