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Characterization of area sensitivity in 55 um pixellated CdTe X-ray imaging detectors
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media. (STC)ORCID iD: 0000-0002-8325-5177
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media. (STC)
Czech Technical University, Prague, Czech Republic.
Czech Technical University, Prague, Czech Republic.
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2007 (English)In: Nuclear Science Symposium Conference Record, 2007. NSS '07. IEEE. Vol.2, New York: IEEE conference proceedings, 2007, 1234-1236 p.Conference paper, (Refereed)
Abstract [en]

X-ray imaging detectors with energy resolution, based on a single photon processing CMOS readout circuit attached to a detector chip, are being developed by different groups. In order to achieve high quantum efficiency it is preferable to use high-Z semiconductor materials. However the fluorescent X-ray photons of such materials have high energies and are able to travel long distances thereby reducing both the spatial resolution and the energy resolution of the detector. In addition charge sharing in the detector and non-uniformities in both the detector and the readout electronics will affect the signal. In this work we have characterized a 1 mm thick CdTe detector with a pixel size of 55 um x 55 um, bump bonded to the MEDIPIX2 single photon processing readout chip. The area sensitivity of the detector is evaluated using a narrow X-ray beam of monoenergetic photons. From these measurements the effects of fluorescence and charge sharing can be evaluated.

Place, publisher, year, edition, pages
New York: IEEE conference proceedings, 2007. 1234-1236 p.
Keyword [en]
Medipix, CdTe, X-ray, imaging
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-7625DOI: 10.1109/NSSMIC.2007.4437227ISI: 000257380400257Local ID: 5460ISBN: 978-1-4244-0922-8 (print)OAI: oai:DiVA.org:miun-7625DiVA: diva2:127875
Conference
IEEE Nuclear Science Symposium/Medical Imaging Conference, Oct 26-Nov 03, 2007, Honolulu
Available from: 2008-12-11 Created: 2008-12-10 Last updated: 2013-03-25Bibliographically approved

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Fröjdh, ChristerNorlin, BörjeFröjdh, AnnaFröjdh, Erik
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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf