4.5- and 8-keV emission and absorption x-ray imaging using spherically bent quartz 203 and 211 crystals (invited)

Abstract

We have used spherically-bent quartz 203 and 211 crystals to image 4.5- and 8-keV sources in both emission and absorption geometries. These imaging systems are straightforward to align, provide high throughput, and can provide high spatial resolution over large fields of view. We discuss the imaging geometry and alignment strategies, and we present experimental results we have obtained from a 1-ns-duration, multikilojoule laser facility and from sub-ps-duration, ultrahigh-intensity laser facilities. Our successful applications suggest that high-quality, spherically-bent quartz crystals may be used to image at many different x-ray energies due to the numerous diffraction planes available from quartz. This range of usable x-ray energies increases the number of applications that might benefit from high-resolution, high-brightness, monochromatic x-ray imaging using bent crystals.

Laser-driven cylindrical compression of targets for fast electron transport study in warm and dense plasmas

“…These x-rays transversally probed the cylinder during the compression. The transmitted x-ray K a -radiation (Ti-K a % 4:5 keV) was selected via a spherically bent quartz crystal (Quartz 203, 2d ¼ 2:749Å, R c ¼ 380 mm) at the first order Bragg incidence (h Bragg $ 89:5 ) located at a distance L 1 ¼ 210 mm from the target, 32 as sketched in Fig. 2.…”

Fast electron generation in cones with ultraintense laser pulses

“…15 In particular the 25 µm thick Cu foils were used with transverse dimensions of 0.5 mm. Measurements at near normal to the target normal showed a bright Κ α emission spot roughly in the center of the foil with symmetric weak intensity enhancements at the four corners.…”

On beam models and their paraxial approximation

“…This combined with sophisticated imaging techniques [30] is providing more experimental evidence of the profile and propagation of high intensity beams. This allows a more accurate theoretical description of high intensity beams and pulses.…”