The Dosepix detector — an energy-resolving photon-counting pixel detector for spectrometric measurements

Language
en
Document Type
Article
Issue Date
2015-05-18
Issue Year
2015
Authors
Zang, Andrea
Anton, Gisela
Ballabriga, R.
Bisello, Francesca
Campbell, M.
Celi, J. C.
Fauler, A.
Fiederle, M.
Jensch, M.
Kochanski, N.
Editor
Abstract

Part of 16th International Workshop on Radiation Imaging Detectors

The Dosepix detector is a hybrid photon-counting pixel detector based on ideas of the Medipix and Timepix detector family. 1 mm thick cadmium telluride and 300 μm thick silicon were used as sensor material. The pixel matrix of the Dosepix consists of 16 x 16 square pixels with 12 rows of (200 μm)2 and 4 rows of (55 μm)2 sensitive area for the silicon sensor layer and 16 rows of pixels with 220 μm pixel pitch for CdTe. Besides digital energy integration and photon-counting mode, a novel concept of energy binning is included in the pixel electronics, allowing energy-resolved measurements in 16 energy bins within one acquisition. The possibilities of this detector concept range from applications in personal dosimetry and energy-resolved imaging to quality assurance of medical X-ray sources by analysis of the emitted photon spectrum. In this contribution the Dosepix detector, its response to X-rays as well as spectrum measurements with Si and CdTe sensor layer are presented. Furthermore, a first evaluation was carried out to use the Dosepix detector as a kVp-meter, that means to determine the applied acceleration voltage from measured X-ray tubes spectra.

Journal Title
Journal of Instrumentation
Volume
10
Issue
4
Citation
Journal of Instrumentation 10.4 (2015) <http://iopscience.iop.org/1748-0221/10/04/C04015?fromSearchPage=true>
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