Synchrotron measurements of the energy response functions of CdTe Medipix2 MXR detectors with pixel pitches of 110 and 165 μm

被引：0
|
作者：
Zuber, M. [1 ]
Koenig, T. [1 ,2 ]
Hamann, E. [2 ,3 ]
Butzer, J. [2 ]
Cecilia, A. [2 ,3 ]
Fiederle, M. [3 ]
Oelfke, U. [1 ]
机构：
[1] German Canc Res Ctr, D-69120 Heidelberg, Germany
[2] Karlsruhe Inst Technol, Inst Photon Sci & Synchrotron Radiat IPS ANKA, D-76344 Eggenstein Leopoldshafen, Germany
[3] Univ Freiburg, Freiburg Mat Res Ctr FMF, D-79104 Freiburg, Germany
来源：
JOURNAL OF INSTRUMENTATION | 2012年 / 7卷
关键词：
Solid state detectors; Pixelated detectors and associated VLSI electronics; Detector alignment and calibration methods (lasers sources particle-beams); X-ray radiography and digital radiography (DR);
D O I：
10.1088/1748-0221/7/12/C12018
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The energy resolution of photon counting pixel detectors depends strongly on the pixel pitch. Small pixels increase the effects of characteristic X-rays and the sharing of charges between adjacent pixels. To investigate the effects of different pixel pitches, measurements with Medipix2 MXR detectors attached to CdTe sensors with pixel pitches of 110 and 165 m m were carried out at the Topo-Tomo beamline of the ANKA synchrotron at the Karlsruhe Institute of Technology (KIT). Photo peaks are measured at a number of energies and are used to calculate the fraction of events in the photo peak compared to the total. Finally, we investigate the linearity of the energy calibration curves as a function of the pixel pitch.
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页数：6
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