Terawatt-scale attosecond X-ray pulses from a cascaded superradiant free-electron laser

Paris Franz, Siqi Li, Taran Driver, River Robles, David Cesar, Erik Isele, Zhaoheng Guo, Jun Wang, Joseph Duris, Kirk A. Larsen, James M. Glownia, Xinxin Cheng, Matthias C. Hoffmann, Xiang Li, Ming‐Fu Lin, Andrei Kamalov, Razib Obaid, Adam M. Summers, Nick Sudar, Emily Thierstein, Zhen Zhang, Matthias F. Kling, Zhirong Huang, James Cryan, Agostino Marinelli