Comparative study of X-ray fluorescence signal collection by collimators of two types

The response signal collection functions in a confocal setup of the X-ray fluorescence (XRF) tomography have been modeled for a polycapillary collimator and a multichannel collimator fabricated by means of microelectronic technology (MT). The dimensions of the effective collection region for the two...

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Bibliographic Details
Published in:Technical physics letters 2012-05, Vol.38 (5), p.452-455
Main Authors: Shabel’nikova, Ya. L., Chukalina, M. V.
Format: Article
Language:English
Subjects:
Classical and Continuum Physics
Physics
Physics and Astronomy
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Summary:The response signal collection functions in a confocal setup of the X-ray fluorescence (XRF) tomography have been modeled for a polycapillary collimator and a multichannel collimator fabricated by means of microelectronic technology (MT). The dimensions of the effective collection region for the two types of collimators are compared. For the MT-fabricated device, a fraction of X-ray photons transmitted due to the total external reflection from channel walls has been evaluated. It is shown that, for a proper choice of parameters, the contribution of these photons to the collection function is negligibly small.
ISSN:1063-7850
1090-6533
DOI:10.1134/S1063785012050288