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Performance of Scintillating Waveguides for CCD-based X-ray Detectors
KTH.
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationsteknologi och medier. (STC)
Université Claude Bernard Lyon-I, France.
Applied Scintillation Technology, United Kingdom.
Vise andre og tillknytning
2006 (engelsk)Inngår i: IEEE Transactions on Nuclear Science, ISSN 0018-9499, E-ISSN 1558-1578, Vol. 53, nr 1, s. 3-8Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Scintillating films are usually used to improve the sensitivity of CCD-based X-ray imaging detectors. For an optimal spatial resolution and detection efficiency, a tradeoff has to be made on the film thickness. However, these scintillating layers can also be structured to provide a pixellated screen. In this paper, the study of CsI(Tl)-filled pore arrays is reported. The pores are first etched in silicon, then oxidized and finally filled with CsI(Tl) to form scintillating waveguides. The dependence of the detector sensitivity on pore depth, varied from 40 to 400 µm here, follows rather well theoretical predictions. Most of the detectors produced in this work have a detective quantum efficiency of the incoming X-ray photons of about 25%; however, one detector shows that higher efficiency can be achieved. The comparison of its efficiency to a 1-mm thick CsI(Tl) crystal indicates that light collection efficiency in the guides may approach what is theoretically possible. Imaging capabilities of the detectors are demonstrated.

sted, utgiver, år, opplag, sider
2006. Vol. 53, nr 1, s. 3-8
Emneord [en]
scintillators, Pixellated detectors, Scintillating waveguides, X-ray imaging
HSV kategori
Identifikatorer
URN: urn:nbn:se:miun:diva-2847DOI: 10.1109/TNS.2005.862981ISI: 000236473800001Scopus ID: 2-s2.0-33645696279Lokal ID: 3021OAI: oai:DiVA.org:miun-2847DiVA, id: diva2:27879
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Tilgjengelig fra: 2008-09-30 Laget: 2008-09-30 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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