2024/09/25 by Zhikai Zhou, Kang Yin, Zhou, Zhikai +5
Engineering · Physics and Astronomy · #Accelerator Physics (physics.acc-ph) #Adaptive optics and wavefront sensing #Advanced X-ray Imaging Techniques #FOS: Physical sciences #Optics (physics.optics) #Particle Accelerators and Free-Electron Lasers
paper · pdf · doi:10.48550/arxiv.2409.16542
openalex publication_date 2024/09/25 · openalex created_date 2024/10/26 · openalex updated_date 2026/07/28
The x-ray vortex optical beam, distinguished by its topological charge and orbital angular momentum, offers new insights in probing complex electronic structures, enhancing material characterization, and advancing high-resolution imaging techniques. Here we propose a straightforward and effective method to generate intense x-ray vortices with tunable wavelengths in high-gain free-electron lasers (FELs). By simply adjusting the wavefront tilt of the radiation pulse during the FEL gain process, high-quality vortex beam can be amplified until saturation. Compared to existing methods for FEL vortex generation, the proposed technique imposes no wavelength limitations and can be easily implemented in high-gain FEL facilities, regardless of the operation modes.