Research on a logarithmically bent Laue crystal analyzer for X-ray monochromatic backlight imaging

Abstract

A new logarithmically bent Laue imaging crystal analyzer (LBLICA) was proposed to obtain the monochromatic image of plasmas and exhibited a great potential for application in the Inertial Confinement Fusion experiment over a large field of view (FOV) and with a high spatial resolution. The imaging geometry of the LBLICA has been discussed. According to the Bragg condition and the equation of the logarithmic spiral, the key image parameters of the crystal analyzer, including the system magnification, the spatial resolution, and the FOV, have been analyzed theoretically. An experiment has been performed with a Cu target X-ray tube as a backlighter to backlight a mesh grid consisting of 50-μm Cu wires, and the monochromatic image of the grid has been obtained with a spatial resolution of approximately 30 μm.

A compact-rigid multi-analyser for energy and angle filtering of high-resolution X-ray experiments. Part 1. Principles and implementation

“…The system developed on this APS BioCAT ID beamline uses a thin Si(111) analyser crystal with an asymmetric cut (thickness 200 mm) curved with an average radius of $ 200 mm; it allows filtering, with a reflectivity of $ 10% for fluorescence measurements at the Ag K edge. Such MAD filtering using a curved crystal in Laue geometry is efficient and was later developed on several spectroscopy beamlines (Zhong et al, 1999;Kropf et al, 2003;Barrea et al, 2010;Wu et al, 2013;Wakisaka et al, 2020). As the curvature parameters of the logarithmic spiral curve depend on the diffraction angle  A of the analysing filter, several systems have to be made for different X-ray sources or for XAFS experiments performed at different emission/absorption energies.…”