Development of high-brightness femtosecond X-ray source

Abstract

Inverse Compton scattering, which is an interaction between a relativistic electron beam and a laser pulse, is an attractive method for femtosecond X-ray generation. The generated X-ray also has good directivity and monochromatic photon energy. We have developed a compact femtosecond X-ray source by the inverse Compton scheme. The pulse duration of the generated X-ray was 150 fs(rms)(17.1 keV) at minimum, and the X-ray photon number at a generation point was 2x10⁶photons/pulse(33.7 keV) at maximum. In this report, we describe the performance of the X-ray source.