摘要
A two-stage echo-enabled harmonic generation(EEHG)scheme is proposed for a superconducting linacdriven FEL to produce coherent hard X-rays.Electron beams of quite different bunch lengths are separately used in each stage of EEHG,and a monochromator is designed to purify the radiation from the first stage for seeding the second stage.Theoretical analysis and 3D simulations indicate that the proposed scheme can generate high-repetition-rate coherent hard X-ray pulses directly from a conventional UV seed laser.
A two-stage echo-enabled harmonic generation （EEHG） scheme is proposed for a superconducting linac- driven FEL to produce coherent hard X-rays. Electron beams of quite different bunch lengths are separately used in each stage of EEHG, and a monochromator is designed to purify the radiation from the first stage for seeding the second stage. Theoretical analysis and 3D simulations indicate that the proposed scheme can generate high-rep- etition-rate coherent hard X-ray pulses directly from a conventional UV seed laser.
基金
partially supported by the National Development and Reform Commission([2013]2347)
National Natural Science Foundation of China(No.11475250)
the Youth Innovation Promotion Association CAS(2015209)
