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X-ray Fluorescence Detection and HDT’s Detector
X-ray fluorescence spectroscopy on dilute metal containing
specimen is a very useful tool in research and application of biology/medicine, material, chemistry, and environment sciences. The technique is gaining acceptance with the operation of powerful synchrotron
sources around the world. Center to the technique is fluorescence detector systems, energy resolving or wavelength dispersive, which can discriminate unwanted background noise from signal to largely improve the
signal quality. Better detector systems are desired to make fully use of the synchrotron sources and to extend the horizon in our research and application.
The next generation fluorescence detectors should
have very good detection efficiency and superb energy resolution. The detection efficiency is related to its collection of solid angle, its maximum count rate and its throughput. A very good energy resolution will
allow the rejection of background from signal and the separation of adjacent fluorescence lines. Traditionally, solid state detectors are utilized for sensitive fluorescence detection. However, the detectors
are count rate limited by the detector processing speed, which largely restricted the detection efficiency. In addition, the energy resolution of the solid state detector will degrade in lower energy region.
HD Technologies Inc has developed wave-length resolved x-ray fluorescence detector using an array of multilayers. The energy photons are selected based on the diffraction principle and are collected by
non-energy resolving detectors. Thus the detectors can have a count rate 100 times more than that of the available solid detectors, while maintaining a very good energy resolution. Unlike crystal based analyzers,
which have little or no tunability, our detectors are tunable over a large energy region.
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