Open Access
X-ray spectra reconstruction with hopg crystal on ttx
TLDR
In this article, the authors proposed and demonstrated a measurement method to reconstruct the spectra of the scattering X-ray by highly oriented pyrolytic graphite (HOPG) crystal based on Bragg law.Abstract:
Thomson Scattering sources, as the new generation of bright X-ray sources, have drawn much attention of scientists. To get the detail information of the scattering X-ray, traditional spectra measurement methods, based on single photon counting, are often troublesome as the Xray beam is too intense to cause pile up problems. In this article, we proposed and demonstrated a measurement method to reconstruct the spectra of the scattering X-ray by highly oriented pyrolytic graphite (HOPG) crystal based on the Bragg law. This method can reconstruct the central energy of the spectra and agree well with the simulation results. Improvement should be made to enhance single-to-noise ratio and measurement equipment be carefully arranged to be able to get more information about the spectra.read more
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Patent
Wavelength dispersive crystal spectrometer, a xray fluorescence device and a method therein
TL;DR: In this article, a wavelength dispersive crystal spectrometer for obtaining an energy band from an energy spectrum includes a plurality of crystal planes stacked on top of each other, wherein each of the crystal planes is made of pyrolytic graphite.
References
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Journal ArticleDOI
A robust method of x-ray source spectrum estimation from transmission measurements: Demonstrated on computer simulated, scatter-free transmission data
TL;DR: This work presents a systematic method of designing the transmission measurements to reduce the mathematical instability of spectrum estimation, and applies the expectation-maximization (EM) method, which is known to yield robust solutions to positive, linear integral equations such as the one that describes spectrum estimation from transmission data.
Journal ArticleDOI
Single shot diffraction of picosecond 8.7-keV x-ray pulses
Finn O'Shea,O. Williams,Gerard Andonian,S. Barber,Y. Sakai,James Rosenzweig,Igor Pogorelsky,Mikhail Fedurin,Karl Kusche,Vitaly Yakimenko +9 more
TL;DR: In this article, a single shot x-ray diffraction was performed by passing the x rays through a vertical slit and on to a flat silicon (111) crystal, where the diffracted photons were detected.
Journal ArticleDOI
Spatial structure of a focused X-ray beam diffracted from crystals.
TL;DR: The spatial structure of a beam focused by a planar refractive lens and Bragg diffracted from perfect silicon crystals was experimentally studied at the focal plane using a knife-edge scan and a high-resolution CCD camera.