A 20 kpixels CdTe photon-counting imager using XPAD chip
Abstract
A 20 kpixels CdTe sensor has been hybridized on XPAD3S CMOS photon-counting chips, forming a 19,200 pixels imaging device. P-type CdTe with rectifying contact has been employed. This sensor works in hole collection mode with a pulse shaping time of about 150 ns. Detector construction and operation are described, and first results obtained with 241Am source as well as diffraction images using an X-ray synchrotron beam are presented. Polarization effects are present, but remain at a very manageable level.
- Publication:
-
Nuclear Instruments and Methods in Physics Research A
- Pub Date:
- May 2008
- DOI:
- 10.1016/j.nima.2008.02.042
- Bibcode:
- 2008NIMPA.589..268B
- Keywords:
-
- Pixel detector;
- Photon counting;
- CdTe;
- Hole collection;
- XPAD3;
- 29.30.Kr;
- 29.40.Gx;
- 29.40.Wk;
- 61.05.Cf;
- Tracking and position-sensitive detectors;
- Solid-state detectors