Testing an Energy-Dispersive Counting-Mode Detector With Hard X-Rays From a Synchrotron Source

• Published in: IEEE transactions on nuclear science Vol. 55; no. 3; pp. 1785 - 1790
• Main Authors: Baumer, C., Martens, G., Menser, B., Roessl, E., Schlomka, J.-P., Steadman, R., Zeitler, G.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.06.2008; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Arrays; Biomedical imaging; Cadmium zinc tellurides; Coincidence; Counting; Detectors; Dispersions; Dynamic tests; Europe; Optical imaging; photon counting; pulse pile-up; Radiation detectors; Storage rings; synchrotron; Synchrotron radiation; Synchrotrons; Testing; X-ray detection; x-ray detector; X-ray detectors; X-ray imaging; X-rays
• ISSN: 0018-9499; 1558-1578
• DOI: 10.1109/TNS.2008.924083

A counting-mode line detector has been evaluated at a synchrotron radiation source in order to assess its performance for imaging applications. The x-ray detector is based on 3 mm thick CdZnTe arrays with 1 mm pixel pitch and multi-threshold counting electronics. Data readout has been performed in threshold scan mode to provide maximum energy dispersion. The acquired energy spectra are interpreted regarding the characteristics of a periodic source and pulse pile-up in the detector. In particular, energy response and rate behavior of single-photon and double-photon events are investigated. Count rate dynamics are studied up to incident rates of . A further subject of the investigation is the variance of the observed counting rate. Linearity in the energy domain is tested between 40 keV and 140 keV.