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Proceedings Paper

High-altitude balloon flight of CdZnTe detectors for high-energy x-ray astronomy
Author(s): Kimberly R. Slavis; Paul F. Dowkontt; Fred Duttweiller; John W. Epstein; Paul L. Hink; George L. Huszar; Philippe C. Leblanc; James L. Matteson; Robert T. Skelton; Edwin A. Stephan
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Paper Abstract

CdZnTe (CZT) is a room-temperature semiconductor well suited for high energy x-ray astronomy. Knowledge of its background properties is essential for optimizing CZT based instruments. To study its background, we flew two CZT detectors on dedicated high altitude balloon flights from Fort Sumner, NM, the first in October 1997 and the second in May 1998. The first detector is a 12 by 12 by 2 mm3 detector with orthogonal crossed strips and the second is a standard 12 by 12 by 2 mm 3 planar detector. The cross strip detector has 500 micron pitched electrodes plus anode 'steering electrodes' to improve the anode charge collection. The energy range for these flights was 20 to approximately 350 keV. We have found a preliminary background level in 20-40 keV of 8.6 by 10-3 cts/cm2-s-keV using passive 2 mm PbSnCu shielding and 6 by 10-4 cts/cm2-s-keV using active collimated schemes for the first position-sensitive CAT detector at balloon altitudes.

Paper Details

Date Published: 10 November 1998
PDF: 15 pages
Proc. SPIE 3445, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX, (10 November 1998); doi: 10.1117/12.330274
Show Author Affiliations
Kimberly R. Slavis, Washington Univ. (United States)
Paul F. Dowkontt, Washington Univ. (United States)
Fred Duttweiller, Univ. of California/San Diego (United States)
John W. Epstein, Washington Univ. (United States)
Paul L. Hink, Washington Univ. (United States)
George L. Huszar, Univ. of California/San Diego (United States)
Philippe C. Leblanc, Univ. of California/San Diego (United States)
James L. Matteson, Univ. of California/San Diego (United States)
Robert T. Skelton, Univ. of California/San Diego (United States)
Edwin A. Stephan, Univ. of California/San Diego (United States)


Published in SPIE Proceedings Vol. 3445:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX
Oswald H. W. Siegmund; Mark A. Gummin, Editor(s)

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