CZT imaging detectors for ProtoEXIST

J. Hong; J. E. Grindlay; N. Chammas; A. Copete; R. G. Baker; S. D. Barthelmy; N. Gehrels; W. R. Cook III; J. A. Burnham; F. A. Harrison; J. Collins; W. W. Craig

doi:10.1117/12.680721

30 August 2006 CZT imaging detectors for ProtoEXIST

J. Hong, J. E. Grindlay, N. Chammas, A. Copete, R. G. Baker, S. D. Barthelmy, N. Gehrels, W. R. Cook III, J. A. Burnham, F. A. Harrison, J. Collins, W. W. Craig

Author Affiliations +

Proceedings Volume 6319, Hard X-Ray and Gamma-Ray Detector Physics and Penetrating Radiation Systems VIII; 63190S (2006) https://doi.org/10.1117/12.680721
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

We describe the detector development for a balloon-borne wide-field hard X-ray (20-600 keV) telescope, ProtoEXIST. ProtoEXIST is a pathfinder for both technology and science of the proposed implementation of the Black Hole Finder Probe, Energetic X-ray Imaging Survey telescope (EXIST). The principal technology challenge is the development of large area, close-tiled modules of imaging CZT detectors (1000 cm² for ProtoEXIST1). We review the updates of the detector design and package concept for ProtoEXIST1 and report the current development status of the CZT detectors, using calibration results of our basic detector unit - 2 x 2 x 0.5 cm CZT crystals with 2.5 mm pixels (8 x 8 array). The current prototype (Rev1) of our detector crystal unit (DCU) shows ~4.5 keV electronics noise (FWHM), and the radiation measurements show the energy resolution (FWHM) of the units is 4.7 keV (7.9%) at 59.5 keV, 5.6 keV (4.6%) at 122 keV, and 7.6 keV (2.1%) at 356 keV. The new (Rev2) DCU with revised design is expected to improve the resolution by ~30%.

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J. Hong, J. E. Grindlay, N. Chammas, A. Copete, R. G. Baker, S. D. Barthelmy, N. Gehrels, W. R. Cook III, J. A. Burnham, F. A. Harrison, J. Collins, and W. W. Craig "CZT imaging detectors for ProtoEXIST", Proc. SPIE 6319, Hard X-Ray and Gamma-Ray Detector Physics and Penetrating Radiation Systems VIII, 63190S (30 August 2006); https://doi.org/10.1117/12.680721

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