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Proceedings Paper

Laboratory coded-aperture imaging experiments: radial hole coded masks and depth-sensitive CZT detectors
Author(s): Jae Sub Hong; Santosh V. Vadawale; Minhua Zhang; Eric C. Bellm; Andrew Yousef; John Noss; Jonathan E. Grindlay; Tomohiko Narita
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Paper Abstract

The proposed black-hole finder mission EXIST will consist of multiple wide-field hard X-ray coded-aperture telescopes. The high science goals set for the mission require innovations in telescope design. In particular, wide energy band coverage and fine angular resolution require relatively thick coded masks and thick detectors compared to their pixel size, which may introduce mask self-collimation and depth-induced image blurring with conventional design approaches. Previously we proposed relatively simple solutions to these potential problems: radial hole for mask selfcollimation and cathode depth sensing detector for image blurring. We have now performed laboratory experiments to explore the potential of these two techniques. The experimental results show that the radial hole mask greatly alleviates mask self-collimation and a ~1 mm resolution depth-sensitive detector scheme can be relatively easily achieved for the large scale required for EXIST.

Paper Details

Date Published: 21 October 2004
PDF: 10 pages
Proc. SPIE 5540, Hard X-Ray and Gamma-Ray Detector Physics VI, (21 October 2004); doi: 10.1117/12.559650
Show Author Affiliations
Jae Sub Hong, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Santosh V. Vadawale, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Minhua Zhang, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Eric C. Bellm, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Andrew Yousef, Harvard-Smithsonian Ctr. for Astrophysics (United States)
John Noss, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Jonathan E. Grindlay, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Tomohiko Narita, College of the Holy Cross (United States)


Published in SPIE Proceedings Vol. 5540:
Hard X-Ray and Gamma-Ray Detector Physics VI
Arnold Burger; Ralph B. James; Larry A. Franks, Editor(s)

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