Abstract:Due to the availability of X-ray imaging detectors, full-field X-ray fluorescence (FF-XRF) imaging technique has become achievable, which provides an alternative to scanning Xray fluorescence imaging with a micro-focus X-ray beamline. In this paper, we present a setup based on straight capillary optics and an energy-dispersive hybrid pixel detector, which can perform simultaneous mapping of several chemical elements. The photon transmission efficiency and spatial resolution are compared between two X-ray colli… Show more
“…The spatial resolution (effective pixel diameter) was 135 and 350 mm using pinholes of 100 and 300 mm, respectively. An impressive factorof-4 reduction of background signal and a 10% increase in analytical signal was achieved by An et al 19 by using a polycapillary optic instead of a pinhole. The detector consisted of an electronic component capable of reading individual pixels and bonded to a 256 Â 256 array silicon chip.…”
This review covers developments in and applications of XRF techniques such as EDXRF, WDXRF, TXRF, XRF microscopy using technologies such as synchrotron sources, X-ray optics, X-ray tubes and detectors, in laboratory, mobile and hand-held systems.
“…The spatial resolution (effective pixel diameter) was 135 and 350 mm using pinholes of 100 and 300 mm, respectively. An impressive factorof-4 reduction of background signal and a 10% increase in analytical signal was achieved by An et al 19 by using a polycapillary optic instead of a pinhole. The detector consisted of an electronic component capable of reading individual pixels and bonded to a 256 Â 256 array silicon chip.…”
This review covers developments in and applications of XRF techniques such as EDXRF, WDXRF, TXRF, XRF microscopy using technologies such as synchrotron sources, X-ray optics, X-ray tubes and detectors, in laboratory, mobile and hand-held systems.
“…8,9 To increase the intensity on the sample, a polycapillary lens can be added between the x-ray generator and the sample. The detection optic can be a pinhole, 10 micro-channel plate, 11,12 straight polycapillary collimator 13 or a PolyCCC, to project the secondary fluorescence of the sample on the x-ray camera. The x-ray camera itself can be energy dispersive, [14][15][16][17] or not, like a standard x-ray CCD 8 with or without scintillator.…”
This article presents recent investigations of newly developed magnifying capillary optics used for full‐field x‐ray spectroscopy. The new cone‐shaped capillary optics reached spatial resolutions of 2.4 μm and increased the magnification factor to 40. These parameters have been evaluated by a confocal full‐field XRF (CFF‐XRF) and a full‐field XRF (FF‐XRF) setup, depicted in this article.
“…With the development of analytical technology, people are no longer satisfied with the traditional qualitative and quantitative analysis, and put forward new needs in the study of the spatial distribution of each chemical component of the material surface. X-ray imaging technology (XRFI) is one of the important means, in which the common X-ray imaging technology is mainly divided into scanning imaging and full-field imaging according to the imaging mode [1][2][3][4][5].…”
Full-field X-ray fluorescence imaging cannot image low
atomic number (Z < 12) materials because the characteristic X-ray
fluorescence produced by low atomic number (Z < 12) materials is
severely attenuated in air. In this paper, we propose a method to
combine Compton scattering with full-field X-ray fluorescence
imaging, which can realize the imaging of both metals (high atomic
number) and organic materials (low atomic number), and compensate
the defect that the conventional FF-XRFI technique cannot image
materials with low atomic number such as organic materials. The
imaging experiments were performed using two materials, zirconium
metal and polyethylene, and the imaging results were optimized using
a density filtering algorithm, and the results indicate that it is
possible to use this method to image samples of high and low atomic
number with resolution.
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