X-ray diffraction imaging of the diamond anvils based on the microfocus x-ray source with a liquid anode

Abstract

This paper presents the results of using laboratory x-ray systems in the study of the crystal structure of anvil made from single-crystal diamond. The system is equipped with an Excillum MetalJet D2 + 70 kV high-brightness x-ray source with a liquid GaIn anode. The x-ray diffraction imaging (topography) technique with the use of a high-resolution x-ray Rigaku camera was applied to analyze crystal structure defects. Two-dimensional images were experimentally recorded using 400 and 111 reflections with a resolution of 1.5 and 5 μm, respectively. These topograms displayed various defects, such as growth striations and dislocations. Possible applications of the proposed laboratory-based optical scheme for high-pressure physics are discussed and future improvements to the setup are suggested.

Laboratory High-Contrast X-ray Microscopy of Copper Nanostructures Enabled by a Liquid-Metal-Jet X-ray Source

“…It should be noted that the used In-rich alloy containing 47 wt.-% Ga, 37 wt.-% In and 16 wt.-% Sn is not optimal for the number of Ga-Kα photons generated; however, it was the alloy practically available for the experiments in this study. The use of a Ga-rich alloy with 95 wt.-% Ga and 5 wt.-% In as a target material yields a Ga-Kα radiant flux of 1.1 × 10 7 photons/(s × mrad 2 ) when operated at 70 kV and 20 µm nominal spot size [ 19 ]. It is about a factor of 3 more compared to the In-rich alloy used in this study—about 4.0 × 10 6 photons/(s × mrad 2 ).…”