Zhentang Zhao

TL;DR: An overview of the features and future prospects of X-ray FELs, including the working principles and properties, the operational status of different FEL facilities worldwide, the applications supported by such facilities, and the current developments and outlook for X-Ray FEL-based research are presented.

TL;DR: The Shanghai Coherent Light Facility (SCLF) as mentioned in this paper is a high repetition-rate X-ray FEL facility, based on an 8-GeV CW superconducting RF linac.

TL;DR: The Shanghai soft X-ray Free-Electron Laser facility (SXFEL) is being developed in two steps; the SXFEL test facility and user facility as discussed by the authors.

TL;DR: This Letter reports on using corrugated structures to compensate for the beam nonlinear energy chirp imprinted by the curvature of the radio-frequency field, leading to a significant reduction in beam energy spread.

TL;DR: The first utilization of a corrugated structure as a beam linearizer in the operation of a seeded free-electron laser driven by a 140 MeV linear accelerator is reported, where a gain of ∼10 000 over spontaneous emission was achieved at the second harmonic of the 1047 nm seed laser, and a free-Electron laser bandwidth narrowing by 50% was observed, in good agreement with the theoretical expectations.