Laboratory coded-aperture imaging experiments: radial hole coded masks and depth-sensitive CZT detectors

Jae Sub Hong; Santosh V. Vadawale; Minhua Zhang; Eric C. Bellm; Andrew Yousef; John Noss; Jonathan E. Grindlay; Tomohiko Narita

doi:10.1117/12.559650

21 October 2004 Laboratory coded-aperture imaging experiments: radial hole coded masks and depth-sensitive CZT detectors

Jae Sub Hong, Santosh V. Vadawale, Minhua Zhang, Eric C. Bellm, Andrew Yousef, John Noss, Jonathan E. Grindlay, Tomohiko Narita

Author Affiliations +

Proceedings Volume 5540, Hard X-Ray and Gamma-Ray Detector Physics VI; (2004) https://doi.org/10.1117/12.559650
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

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.

Citation Download Citation

Jae Sub Hong, Santosh V. Vadawale, Minhua Zhang, Eric C. Bellm, Andrew Yousef, John Noss, Jonathan E. Grindlay, and Tomohiko Narita "Laboratory coded-aperture imaging experiments: radial hole coded masks and depth-sensitive CZT detectors", Proc. SPIE 5540, Hard X-Ray and Gamma-Ray Detector Physics VI, (21 October 2004); https://doi.org/10.1117/12.559650

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