No abstract

In this study, a toroidal quartz (202 3) crystal is designed for monochromatic X-ray imaging at 72.3°. The designed crystal produces excellent images of a laser-produced plasma emitting He-like Ti X-rays at 4.75 keV. Based on the simulations, the imaging resolutions of the spherical and toroidal crystals in the sagittal direction are found to be 15 and 5 μm, respectively. Moreover, the simulation results shows that a higher resolution image of the source can be obtained by using a toroidal crystal. An X-ray backlight imaging experiment is conducted using 4.75 keV He-like Ti X-rays, a 3 × 3 metal grid, an imaging plate, and a toroidal quartz crystal with a lattice constant of 2d = 0.2749 nm. The meridional and sagittal radii of the toroidal α-quartz crystal is 295.6 and 268.5 mm, respectively. A highly resolved image of the microgrid, with a spatial resolution of 10 μm, is obtained in the experiment. By using similar toroidal crystal designs, the application of

A curved x-ray spectrometer based on a multi-cone crystal has been developed and demonstrated to improve
the spectra resolution and intensity e ciency measurements by our experiments and simulations. Here 6000
conical rings with a single-ringe of 10 m to free the stress on the lattice planes was successfully realized
in the multi-cone crystal, which provides a much larger solid collection angle and higher resolution than the
usually-used planer crystal in the general x-ray spectrometer. Thus, the experimental results show that its
spectrum resolution can reach 3.5 eV (full-width half maximum, FWHM) with the corresponding E= E
of 1420 ( 4976 eV). The intesity at the focus spot can be 110 times higher compared to that measured by a
planer cryatal spectrometer. Meanwhile, these results have also been con rmed by our numerical studies with
our new developed x-ray arbitrary-surface-crystal di raction software, X-chase. Attentionaly development
on the x-ray spectrometer is of speci c importance in the high energy density physics (HEDP), inertial
con nement fusion (ICF), and Astrophysics experiments.