Zhao Z T, Wang Z, Feng C, Chen S, Cao L
Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Sci Rep. 2021 Dec 13;11(1):23875. doi: 10.1038/s41598-021-03354-0.
Energy recovery linac (ERL) holds great promise for generating high repetition-rate and high brightness electron beams. The application of ERL to drive a free-electron laser is currently limited by its low peak current. In this paper, we consider the combination of ERL with the recently proposed angular-dispersion induced microbunching technique to generate fully coherent radiation pulses with high average brightness and tunable pulse length. Start-to-end simulations have been performed based on a low energy ERL (600 MeV) for generating coherent EUV radiation pulses. The results indicate an average brightness over 10 phs/s/mm/mrad/0.1%BW and average power of about 100 W at 13.5 nm or 20 W with the spectral resolution of about 0.5 meV with the proposed technique. Further extension of the proposed scheme to shorter wavelength based on an ERL complex is also discussed.
能量回收直线加速器（ERL）在产生高重复率和高亮度电子束方面具有巨大潜力。目前，ERL用于驱动自由电子激光器受到其低峰值电流的限制。在本文中，我们考虑将ERL与最近提出的角色散诱导微聚束技术相结合，以产生具有高平均亮度和可调脉冲长度的完全相干辐射脉冲。基于低能量ERL（600 MeV）进行了从头到尾的模拟，以产生相干极紫外（EUV）辐射脉冲。结果表明，采用所提出的技术，在13.5 nm处平均亮度超过10 phs/s/mm/mrad/0.1%BW，平均功率约为100 W；在光谱分辨率约为0.5 meV时平均功率为20 W。还讨论了基于ERL复合体将所提出的方案进一步扩展到更短波长的情况。
