,Two-stage EEHG for coherent hard X-ray generation based on a superconducting linac

• 作 者: Zhen-Tang Zhao Chao Feng Kai-Qing Zhang
• 机 构: Shanghai Institute of Applied Physics, Chinese Academy of Sciences,
• 出 处: Nuclear Science and Techniques
• 发表日期: 2017年08期
• 关键词: EEHG Fresh beam X-ray monochromator Superconducting accelerator

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 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.