Abstract
In order to effectively improve the output quality of x-ray free electron laser (XFEL), we theoretically propose an XFEL scheme seeded by atomic inner-shell laser. Atomic inner-shell lasers based on neutral atoms and pumped by XFEL have been experimentally demonstrated [Rohringer et al., Nature (London) 481, 488 (2012), Yoneda et al., Nature (London) 524, 446 (2015)], which produced sub-femtosecond X-ray pulses with increased temporal coherence. It shows that, by using the inner-shell laser as a seed to modulate the electron bunch, very stable and almost fully-coherent short-wavelength XFEL pulses can be generated. The proposed scheme holds promising prospects in x-ray wavelengths, and even shorter.
Highlights
The generation of lasers has brought great benefits to physics, chemistry, and biology researches
In order to effectively improve the output quality of x-ray free electron laser (XFEL), we theoretically propose an XFEL scheme seeded by atomic inner-shell laser
A scheme that combines self-seeding method and atomic inner-shell X-ray laser (XRL) to improve the longitudinal coherence of XFEL is proposed
Summary
The generation of lasers has brought great benefits to physics, chemistry, and biology researches. X-ray free electron lasers (XFEL) based on self-amplified spontaneous emission (SASE) [3,4] have made it possible to generate a hard x-ray laser (that is, photon energy is of the order of ten kiloelectronvolts) in an ångström-wavelength regime [5,6]. This process starts from the electron beam shot noise and creates light pulses of limited temporal coherence [7].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
