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Prototype Imaging CD-ZN-TE Array Detector

Published online by Cambridge University Press:  10 February 2011

P. F. Bloser ,
T. Narita ,
J. E. Grindlay  and
K. Shah
P. F. Bloser
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138
T. Narita
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138
J. E. Grindlay
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138
K. Shah
Affiliation:
Radiation Monitoring Devices, Inc., Watertown, MA 02172
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Abstract

We describe initial results of our program to develop and test Cd-Zn-Te (CZT) detectors with a pixellated array readout. Our primary interest is in the development of relatively thick CZT detectors for use in astrophysical coded aperture telescopes with response extending over the energy range ∼ 10 – 600 keV. The coded aperture imaging configuration requires only relatively large area pixels (1–3 mm), whereas the desired high energy response requires detector thicknesses of at least 3–5 mm. We have developed a prototype detector employing a 10 × 10 × 5 mm CZT substrate and 4 × 4 pixel (1.5 mm each) readout with gold metal contacts for the pixels and continuous gold contact for the bias on the opposite detector face. This MSM contact configuration was fabricated by RMD and tested at Harvard for uniformity, efficiency and spatial as well as spectral resolution. We have developed an ASIC readout (IDE-VA-1) and analysis system and report results, including ∼ 4% (FWHM) energy resolution at 60 keV. A prototype design for a full imaging detector array is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 487: Symposium I – Semiconductors for Room-Temperature Radiation II , 1997 , 153
Copyright
Copyright © Materials Research Society 1998

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