Abstract
A novel x-ray generation scheme is presented, which is considered to produce attosecond, tunable, coherent xray pulses with high brightness. This scheme is based on a reflection of the incidence laser pulse by a mirror moving at the speed close to that of light. The mirror consists of dense electrons as a breaking wake wave formed by a high-intensity laser pulse. We describe theoretical basis of this flying mirror concept and the proof-of-principle experiment. For comparison, other x-ray generation schemes are also presented.
