High efficiency X-ray diffraction diagnostic spectrometer with multi-curvature bent crystal

Shi, Jun; Tong, Yao; Li, Miao; Gao, Yang; Wei, Minxi; Shang, Wanli; Wang, Feng

doi:10.3788/col202018.113401

Cited by 3 publications

(3 citation statements)

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“…High-resolution X-ray imaging is very important in research fields such as laser-driven inertial-confinement fusion (ICF), high-energy-density physics, and laboratory astrophysics [1][2][3] . In ICF experiments, high-resolution X-ray monochromatic imaging of the hot spot in the late stages of a pellet implosion is a necessary diagnostic method for studying important physical issues, such as the shape of the hot spot, the temperature distribution, and fuel mixing [4,5] . As the driving energy and implosion mass are increased, the target pellet reaches states of higher energy and density.…”

Section: Introductionmentioning

confidence: 99%

High-resolution Mo Kα X-ray monochromatic backlight imaging using a toroidal crystal

Si,

Shan,

et al. 2023

中国光学快报

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Curved crystal imaging is an important means of plasma diagnosis. Due to the short wavelengths of high-energy X rays and the fixed lattice constant of the spherical crystal, it is difficult to apply the spherical crystal in high-energy X-ray imaging. In this study, we have developed a high-energy, high-resolution X-ray imager based on a toroidal crystal that can effectively correct astigmatism. We prepared a Ge h5 1 1i toroidal crystal for backlighting Mo Kα1 characteristic lines (∼17.48 keV) and verified its high-resolution imaging ability in high-energy X-ray region, achieving a spatial resolution of 5-10 μm in a field of view larger than 1.0 mm.

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Section: Introductionmentioning

confidence: 99%

High-resolution Mo Kα X-ray monochromatic backlight imaging using a toroidal crystal

Si,

Shan,

et al. 2023

中国光学快报

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“…Brightness is a key indicator of X-ray light sources. Higher brightness means that X-ray detection can obtain a higher space-time resolution in equal dimensions of energy [5][6][7]. Therefore, XFEL is acclaimed as the brightest light.…”

Section: Introductionmentioning

confidence: 99%

Application of Flow Field Analysis in Ion Beam Figuring for Ultra-Smooth Machining of Monocrystalline Silicon Mirror

Wang

Fang

et al. 2022

Micromachines

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X-ray free-electron lasers are large modern scientific devices that play an important role in fields such as frontier physics and biomedicine. In this study, a light source is connected to an experimental station through beam lines, which requires numerous ultra-smooth and high-precision X-ray mirrors. Monocrystalline silicon is an ideal substrate material where ion-beam figuring is required. However, the ultra-smooth surface is damaged after the ion-beam figuring. Through an analysis of the machined surface, it is found that in the process of vacuum pumping, the impurities in the cavity adhere to the machined surface and increase the roughness after processing. Therefore, an optimized vacuum-pumping scheme is proposed. The experiment demonstrates that the original value of the processed surface roughness remains unchanged.

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“…However, the experimental X-ray collection efficiency of a flat crystal is low, and the spectral resolution is largely affected by the source size; therefore, high-resolution detection cannot be performed using a flat crystal spectrometer [13] . To overcome the shortcomings of flat crystal spectrometers, bent crystal spectrometers were developed and extensively investigated [14][15][16] . The presently used bent crystal spectrometers contain spectroscopic crystals with different structures, such as cylindrical [17] , spherical [18] , conical [19,20] and elliptical [21] .…”

Section: Introductionmentioning

confidence: 99%

Designing a toroidal crystal for monochromatic X-ray imaging of a laser-produced He-like plasma

Tong

Zuhua

et al. 2022

High Pow Laser Sci Eng

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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

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High efficiency X-ray diffraction diagnostic spectrometer with multi-curvature bent crystal

Cited by 3 publications

References 0 publications

High-resolution Mo Kα X-ray monochromatic backlight imaging using a toroidal crystal

High-resolution Mo Kα X-ray monochromatic backlight imaging using a toroidal crystal

Application of Flow Field Analysis in Ion Beam Figuring for Ultra-Smooth Machining of Monocrystalline Silicon Mirror

Designing a toroidal crystal for monochromatic X-ray imaging of a laser-produced He-like plasma

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