Scheme for generating 1 nm X-ray beams carrying orbital angular momentum at the SXFEL

doi:10.1007/s41365-020-00794-7

Nuclear Science and Techniques ›› 2020, Vol. 31 ›› Issue (9): 88 doi: 10.1007/s41365-020-00794-7

• SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS • Previous Articles Next Articles

Scheme for generating 1 nm X-ray beams carrying orbital angular momentum at the SXFEL

He-Ping Geng^1,2 • Jian-Hui Chen³ • Zhen-Tang Zhao³

¹ Chinese Academy of Sciences, Shanghai Institute of Applied Physics, Shanghai 201800, China
² University of Chinese Academy of Sciences, Beijing 100049, China
³ Chinese Academy of Sciences, Shanghai Advanced Research Institute, Shanghai 201210, China

Received:2020-05-29 Revised:2020-07-16 Accepted:2020-07-17
Contact: Jian-Hui Chen E-mail:chenjianhui@zjlab.org.cn
Supported by:
This work was supported by the National Development and Reform Commission ([2013]2347) and National Basic Research Program of China (No. 2015CB859700).

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He-Ping Geng, Jian-Hui Chen, Zhen-Tang Zhao. Scheme for generating 1 nm X-ray beams carrying orbital angular momentum at the SXFEL.Nuclear Science and Techniques, 2020, 31(9): 88 doi: 10.1007/s41365-020-00794-7

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Abstract

Abstract: Optical vortices have the main features of helical wavefronts and spiral phase structures, and carry orbital angular momentum. This special structure of visible light has been produced and studied for various applications. These notable characteristics of photons were also tested in the extreme-ultraviolet and X-ray regimes. In this article, we simulate the use of a simple afterburner configuration by directly adding helical undulators after the SASE undulators with the Shanghai Soft X-ray FEL to generate high intensity X-ray vortices with wavelengths ∼ 1 nm. Compared to other methods, this approach is easier to implement, cost-effective, and more efficient.

Key words: X-ray, Orbital angular momentum (OAM), Synchrotron light source Free-electron laser (FEL)

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Scheme for generating 1 nm X-ray beams carrying orbital angular momentum at the SXFEL

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