Speaker
Description
A comprehensive framework for the generation and diagnostics of X-ray and THz OAM beams has been successfully established at the Shanghai Soft X-ray Free-Electron Laser (SXFEL) facility. This work effectively bridges the gap between advanced orbital angular momentum (OAM) physics and the stringent beam quality requirements of a high-performance XFEL facility. The ability to produce soft X-ray vortex radiation with GW-level peak power and THz OAM pulses reaching 385 μJ represents a significant technical milestone. However, the research is further distinguished by its remarkable flexibility in manipulating topological charge numbers and the development of a robust multi-pinhole interference diagnostic system for precise beam characterization. These advancements, combined with the innovative use of wavefront-tilt reflectors, offer a practical and versatile path toward high-brightness structured light sources for frontier scientific applications.
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