Thick CZT detectors for spaceborne x-ray astronomy

Henric S. Krawczynski; Ira Jung; Jeremy S. Perkins; Arnold Burger; Michael Groza

doi:10.1117/12.558912

21 October 2004 Thick CZT detectors for spaceborne x-ray astronomy

Henric S. Krawczynski, Ira Jung, Jeremy S. Perkins, Arnold Burger, Michael Groza

Proceedings Volume 5540, Hard X-Ray and Gamma-Ray Detector Physics VI; (2004) https://doi.org/10.1117/12.558912
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

Cadmium Zinc Telluride (CZT) detectors are having a major impact on the field of hard X-ray astronomy. Without the need for cryogenic cooling they achieve good spatial and energy resolutions over the broad energy range from 10 keV to ~600 keV. In this paper, we briefly review the historical development of detectors used in X-ray astronomy. Subsequently, we present an evaluation of CZT detectors from the company Imarad. The standard 2x2x0.5 cm detectors, contacted with 8x8 In pixels and an In cathode, exhibit FWHM energy resolutions of 7 keV at 59 keV, and 10 keV at 662 keV. A direct measurement of the 662 keV photopeak efficiency gives 67%. We have started a detailed study of the performance of Imarad detectors depending on surface preparation, contact materials, contact deposition, post-deposition detector annealing, and detector passivation techniques. We present first results from contacting detectors with Cr, Ag, Au, and Pt.

Citation Download Citation

Henric S. Krawczynski, Ira Jung, Jeremy S. Perkins, Arnold Burger, and Michael Groza "Thick CZT detectors for spaceborne x-ray astronomy", Proc. SPIE 5540, Hard X-Ray and Gamma-Ray Detector Physics VI, (21 October 2004); https://doi.org/10.1117/12.558912

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