摘要
A novel approach to producing coherent hard X-ray based on the echo-enabled staged harmonic generation (EESHG) free-electron laser scheme is proposed. This scheme is not a simple cascaded echo-enabled harmonic generation (EEHG) but consists of an EEHG and a conventional high-gain harmonic generation (HGHG) like configuration, which also works in the EEHG principle. It is shown that fully coherent hard X-ray radiation can be obtained directly from a conventional VUV seed laser with reduced size and cost in comparison with the self-amplified spontaneous emission (SASE) based hard X-ray facilities.
A novel approach to producing coherent hard X-ray based on the echo-enabled staged harmonic generation （EESHG） free-electron laser scheme is proposed. This scheme is not a simple cascaded echo-enabled harmonic generation （EEHG） but consists of an EEHG and a conventional high-gain harmonic generation （HGHG） like configuration, which also works in the EEHG principle. It is shown that fully coherent hard X-ray radiation can be obtained directly from a conventional VUV seed laser with reduced size and cost in comparison with the self-amplified spontaneous emission （SASE） based hard X-ray facilities.
基金
supported by the National Natural Science Foundation of China (Grant No. 10935011)
