A Compact X-Ray Laser with Ion Source and Crystal Cavity

TL;DR

This paper introduces a compact X-ray laser device that uses an ion source and crystal cavity, aiming to reduce size and cost while improving coherence, potentially rivaling large-scale XFELs.

Contribution

The paper presents a novel compact X-ray laser design integrating an ion source and crystal cavity, offering a more accessible alternative to traditional XFELs.

Findings

Design achieves high reflectivity with crystal Bragg diffraction.

The device demonstrates potential for high coherence and compactness.

Further optimization could enable it to rival large XFELs.

Abstract

X-ray free-electron lasers (XFELs) are renowned for their high brightness, significantly impacting biology, chemistry, and nonlinear X-ray optics. However, current XFELs are large, expensive, and exhibit significant shot-to-shot instability. Here, we propose a novel compact apparatus for generating X-ray lasers. The setup integrates an ion source to produce highly charged ions as the gain medium. The X-ray optical cavity employs crystal Bragg diffraction for high reflectivity at large angles, and two parabolic compound refractive lenses (CRLs) focus the X-rays. Pumping is achieved through electron collision excitations. This X-ray laser offers compact dimensions, reduced costs, and enhanced coherence, positioning it as a promising seed for XFELs. With further optimization, this device has the potential to rival XFELs and revolutionize both scientific research and industrial applications.