An X-ray scanner prototype based on a novel hybrid gaseous detector
2007 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, Vol. 573, no 02-jan, 61-64 p.Article in journal (Refereed) Published
We have developed a prototype of a new type of hybrid X-ray detector. It contains a thin wall (few mu m) edge-illuminated lead glass capillary plate (acting as a converter of X-rays photons to primary electrons) combined with a microgap parallel-plate avalanche chamber operating in various gas mixtures at 1 atm. The operation of these converters was studied in a wide range of X-ray energies (from 6 to 60 keV) at incident angles varying from 0 degrees to 90 degrees. The detection efficiency, depending on the geometry, photon's energy, incident angle and the mode of operation, was between a few and similar to 40%. The position resolution achieved was similar to 50 mu m in digital form and was practically independent of the photon's energy or gas mixture. The developed detector may open new possibilities for medical imaging, for example in mammography, portal imaging, radiography (including security devices), crystallography and many other applications.
Place, publisher, year, edition, pages
2007. Vol. 573, no 02-jan, 61-64 p.
mammography, capillary plates, gaseous detector, digital mammography, radiography
IdentifiersURN: urn:nbn:se:kth:diva-16545DOI: 10.1016/j.nima.2006.10.252ISI: 000245624200018ScopusID: 2-s2.0-33847642933OAI: oai:DiVA.org:kth-16545DiVA: diva2:334587
QC 201005252010-08-052010-08-05Bibliographically approved