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An imaging CdZnTe detector with coplanar orthogonal anode strips

Published online by Cambridge University Press:  10 February 2011

L. A. Hamel ,
O. Tousignant ,
M. Couillard ,
J. F. Courville ,
V. T. Jordanov ,
J. R. Macri ,
K. Larson ,
M. Mayer ,
M. L. McConnell  and
J. M. Ryan
L. A. Hamel
Affiliation:
Groupe de recherche en physique et technologie des couches minces (GCM), University of Montreal, Montreal, H3C 3J7, Canada
O. Tousignant
Affiliation:
Groupe de recherche en physique et technologie des couches minces (GCM), University of Montreal, Montreal, H3C 3J7, Canada
M. Couillard
Affiliation:
Groupe de recherche en physique et technologie des couches minces (GCM), University of Montreal, Montreal, H3C 3J7, Canada
J. F. Courville
Affiliation:
Groupe de recherche en physique et technologie des couches minces (GCM), University of Montreal, Montreal, H3C 3J7, Canada
V. T. Jordanov
Affiliation:
Consultant, Durham, NH 03824, USA.
J. R. Macri
Affiliation:
Space Science Center, University of New Hampshire Durham, NH 03824, USA.
K. Larson
Affiliation:
Space Science Center, University of New Hampshire Durham, NH 03824, USA.
M. Mayer
Affiliation:
Space Science Center, University of New Hampshire Durham, NH 03824, USA.
M. L. McConnell
Affiliation:
Space Science Center, University of New Hampshire Durham, NH 03824, USA.
J. M. Ryan
Affiliation:
Space Science Center, University of New Hampshire Durham, NH 03824, USA.
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Abstract

A novel electrode configuration for CZT imaging devices is presented. It is made of focusing, non-collecting anode strips, in one dimension, and collecting anode pixels, interconnected in rows, in the orthogonal dimension. The simulation of such an imaging detector is presented. First, field lines in the detector are computed that show that electrons generated in γ-ray events are collected on the pixels. Charge signals, induced on the pixel and on the strip by drifting electrons, are calculated for several points of interaction inside the detector unit cell. These show that this new detector should retain the spectroscopic and detection efficiency advantages of single carrier (electrons) charge sensing devices such as pixel detectors or spectrometers with controlling electrodes. Furthermore, it retains the main advantage of conventional strip detectors, i.e. an N x N array of imaging pixels realized with only 2N electronic channels. An additional potential advantage is the measurement of the third coordinate, i.e. the depth of interaction in the detector.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 487: Symposium I – Semiconductors for Room-Temperature Radiation II , 1997 , 211
Copyright
Copyright © Materials Research Society 1998

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