DocumentCode :
1345208
Title :
Performance and simulation of CdZnTe strip detectors as sub-millimeter resolution imaging gamma radiation spectrometers
Author :
Mayer, M. ; Boykin, D.V. ; Cherry, M.L. ; Courville, J.F. ; Doty, F.P. ; Drake, A. ; Guzik, T.G. ; Hamel, L.A. ; Larson, K. ; Macri, J.R. ; McConnell, M.L. ; Ryan, J.M. ; Tousignant, O.
Author_Institution :
Space Sci. Center, New Hampshire Univ., Durham, NH, USA
Volume :
44
Issue :
3
fYear :
1997
fDate :
6/1/1997 12:00:00 AM
Firstpage :
922
Lastpage :
928
Abstract :
We report γ-ray detection performance measurements and computer simulations of a sub-millimeter pitch CdZnTe strip detector. The detector is a prototype for γ-ray astronomy measurements in the range of 20-200 keV. The prototype is a 1.5 mm thick, 64×64 orthogonal stripe CdZnTe detector of 0.375 mm pitch in both dimensions, with approximately one square inch of sensitive area. Using discrete laboratory electronics to process signals from an 8×8 strip region of the prototype we measured good spectroscopic uniformity and sub-pitch (~0.2 mm) spatial resolution in both x and y dimensions. We present below measurements of the spatial uniformity, relative timing and pulse height of the anode and cathode signals, and the photon detection efficiency. We simulated the photon interactions and signal generation in the strip detector and the test electronics and we compare these results to the data. The data indicate that the cathode signal-as well as the anode signal-arises primarily from the conduction electrons rather than the holes. This presents a detection efficiency limitation which must be considered in the design of strip detector systems
Keywords :
gamma-ray detection; gamma-ray spectrometers; position sensitive particle detectors; semiconductor counters; semiconductor device models; timing; γ-ray astronomy; γ-ray detection performance; 0.2 mm; 0.375 mm; 1.5 mm; 20 to 200 keV; CdZnTe; CdZnTe strip detectors; anode signal; cathode signal; detection efficiency; gamma radiation spectrometers; photon detection efficiency; pulse height; relative timing; simulation; spatial resolution; spatial uniformity; sub-millimeter resolution; Anodes; Cathodes; Computational modeling; Electronic equipment testing; Extraterrestrial measurements; Gamma ray detection; Gamma ray detectors; Prototypes; Pulse measurements; Strips;
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/23.603778
Filename :
603778
Link To Document :
بازگشت