Work

Intense X-Ray Vortices Generation via Wavefront Shaping in High-Gain Free-Electron Lasers

Year: 2025

Type: article

Abstract: 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 novel and reliable 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 with existing methods for FEL vortex generation, the proposed technique offers broader wavelength tunability and can be easily implemented in high-gain FEL facilities, regardless of the operating modes.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.134.205001

Authors: Zhikai Zhou, Yin Kang, Weishi Wan, Chao Feng

Institutions: ShanghaiTech University, Chinese Academy of Sciences, Shanghai Institute of Applied Physics, University of Chinese Academy of Sciences, Shanghai Advanced Research Institute

Language: English

Topic: Particle Accelerators and Free-Electron Lasers

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funder: National Natural Science Foundation of China

Award: G2344850509