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Structured scintillators for X-ray imaging with micrometre resolution
KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.ORCID iD: 0000-0002-5260-5322
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2009 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 607, no 1, 141-144 p.Article in journal (Refereed) Published
Abstract [en]

A 3D X-ray detector for imaging of 30-200keV photons is described. It comprises a stack of semitransparent structured scintillators, where each scintillator is a regular array of waveguides in silicon, and with pores filled with CsI. The performance of the detector is described theoretically and explored in detail through simulations. The resolution of a single screen is shown to be determined only by the pitch, at least up to 100 keV. In comparison to conventional homogenous screens an improvement in efficiency by a factor 5-15 is obtainable. The cross-talk between screens in the 3D detector is shown to be negligible. The concept of such a 3D detector enables ray tracing and super resolution algorithms to be applied. Realized pore geometries have a lower aspect ratio than used in simulations and the roughness of the pore walls gives a 13% decrease in waveguide efficiency. Compared to currently used regular scintillators with similar resolution an efficiency increase by a factor 4 has been found for the structured scintillator.

Place, publisher, year, edition, pages
2009. Vol. 607, no 1, 141-144 p.
Keyword [en]
Scintillator, Detector, Imaging, Hard X-ray, Simulation
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-30716DOI: 10.1016/j.nima.2009.03.139ISI: 000268987900042Scopus ID: 2-s2.0-67650494359OAI: oai:DiVA.org:kth-30716DiVA: diva2:402710
Note
QC 20110309Available from: 2011-03-09 Created: 2011-03-04 Last updated: 2017-12-11Bibliographically approved

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Linnros, Jan

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Microelectronics and Applied Physics, MAP
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  • apa
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