Abstract
To study ultrafast processes at the sub-picosecond level, novel methods based on coherent harmonic generation technologies have been proposed to generate ultrashort radiation pulses in existing ring-based light sources. Using the High Energy Photon Source as an example, we numerically test the feasibility of implementing one coherent harmonic generation technology, i.e., the echo-enabled harmonic generation (EEHG) scheme, in a diffraction-limited storage ring (DLSR). Two different EEHG element layouts are considered, and the effect of the EEHG process on the electron beam quality is also analyzed. Studies suggest that soft X-ray pulses, with pulse lengths of a few femtoseconds and peak powers of up to 1 MW, can be generated by using the EEHG scheme, while causing little perturbation to the regular operation of a DLSR.
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Acknowledgements
The authors would thank Dr. Chao Feng, Tong Zhang, Xiao-Yu Li, Xiao-Fan Wang, Zheng Qi, Hai-Xiao Deng, and Yi Wu for their helpful discussions.
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This work was supported by National Natural Science Foundation of China (No. 11475202, 11405187), the Youth Innovation Association of Chinese Academy of Sciences, and Key Research Program of Frontier Sciences, CAS (No. QYZDJ-SSW-SLH001).
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Liu, WH., Zhou, GQ. & Jiao, Y. Generating femtosecond coherent X-ray pulses in a diffraction-limited storage ring with the echo-enabled harmonic generation scheme. NUCL SCI TECH 29, 143 (2018). https://doi.org/10.1007/s41365-018-0476-z
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DOI: https://doi.org/10.1007/s41365-018-0476-z