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Performance of scintillating waveguides for CCD-based X-ray detectors
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- Badel, Xavier (author)
- KTH,Mikroelektronik och Informationsteknik, IMIT
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- Norlin, Börje (author)
- Mittuniversitetet,Institutionen för informationsteknologi och medier (-2013),STC
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- Kleimann, P. (author)
- LENAC, Université Claude Bernard Lyon-I, Villeurbanne,Université Claude Bernard Lyon-I, France
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- (creator_code:org_t)
- 2006
- 2006
- English.
- In: IEEE Transactions on Nuclear Science. - 0018-9499 .- 1558-1578. ; 53:1, s. 3-8
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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(TI)-filled pore arrays is reported. The pores are first etched in silicon, then oxidized and finally filled with CsI(TI) to form scintillating waveguides. The dependence of the detector sensitivity on pore depth, varied from 40 to 400 mu m 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 approaching almost the theoretical limit set by Poisson statistics of the incoming X-rays. Thus, we conclude that it is possible to fabricate scintillating waveguides with almost ideal performance. Imaging capabilities of the detectors are demonstrated.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Keyword
- Pixellated detectors
- Scintillating waveguides
- X-ray imaging
- Charge coupled devices
- Detectors
- Photons
- Scintillation
- Statistics
- X rays
- Pixellated detectors
- Scintillating waveguides
- X-ray imaging
- Optical waveguides
- Electrophysics
- Elektrofysik
- Electrical engineering, electronics and photonics
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Fröjdh, Christer
- Linnros, Jan
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