TY - RPRT TI - Active Q-Switched X-Ray Regenerative Amplifier Free-Electron Laser AU - Tang, Jingyi AU - Zhang, Zhen AU - Morgan, Jenny AU - Hemsing, Erik AU - Huang, Zhirong PY - 2023 DO - 10.1103/physrevlett.131.055001 UR - https://www.osti.gov/biblio/1992923 ID - 1992923 ER -