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Proceedings Paper

CZT imaging detectors for ProtoEXIST
Author(s): J. Hong; J. E. Grindlay; N. Chammas; A. Copete; R. G. Baker; S. D. Barthelmy; N. Gehrels; W. R. Cook; J. A. Burnham; F. A. Harrison; J. Collins; W. W. Craig
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Paper 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%.

Paper Details

Date Published: 30 August 2006
PDF: 11 pages
Proc. SPIE 6319, Hard X-Ray and Gamma-Ray Detector Physics and Penetrating Radiation Systems VIII, 63190S (30 August 2006); doi: 10.1117/12.680721
Show Author Affiliations
J. Hong, Harvard-Smithsonian Ctr. for Astrophysics (United States)
J. E. Grindlay, Harvard-Smithsonian Ctr. for Astrophysics (United States)
N. Chammas, Harvard-Smithsonian Ctr. for Astrophysics (United States)
A. Copete, Harvard-Smithsonian Ctr. for Astrophysics (United States)
R. G. Baker, NASA Goddard Space Flight Ctr. (United States)
S. D. Barthelmy, NASA Goddard Space Flight Ctr. (United States)
N. Gehrels, NASA Goddard Space Flight Ctr. (United States)
W. R. Cook, California Institute of Technology (United States)
J. A. Burnham, California Institute of Technology (United States)
F. A. Harrison, California Institute of Technology (United States)
J. Collins, Lawrence Livermore National Lab. (United States)
W. W. Craig, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 6319:
Hard X-Ray and Gamma-Ray Detector Physics and Penetrating Radiation Systems VIII
F. Patrick Doty; Larry A. Franks; Arnold Burger; H. Bradford Barber; Hans Roehrig; Ralph B. James, Editor(s)

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