Designing a toroidal crystal for monochromatic X-ray imaging of a laser-produced He-like plasma. (26th September 2022)

• Record Type: Journal Article
• Authors: Li, Miao; Yao, Tong; Yang, Zuhua; Shi, Jun; Wang, Feng; Yang, Guohong; Wei, Minxi; Sun, Ao; Li, Yang
• Is Part Of: High power laser science and engineering. Volume 10(2022)
• Publication Date: 2022-09-26
• Subjects: dynamic diffraction -- monochromatic X-ray imaging -- resolution -- toroidal quartz crystal; High power lasers -- Periodicals; 621.366
• DOI: 10.1017/hpl.2022.25
• Languages: English
• ISSNs: 2095-4719

Abstract

Abstract: In this study, a toroidal quartz ( $20\overline{2}3$ ) 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 show 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 2 d = 0.2749 nm. The meridional and sagittal radii of the toroidal α-quartz crystal are 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 spatially resolved spectrometer with high-resolution X-ray imaging ability is capable of providing imaging data with the same magnification ratio in the sagittal and meridional planes.