Share Email Print

Proceedings Paper

High-altitude balloon flight of CdZnTe detectors for high-energy x-ray astronomy: II
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
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Cadmium Zinc Telluride (CZT) is a room temperature semiconductor detector well suited for high energy x-ray astronomy. We have developed a CZT detector with 500 micron crossed strip readout and an advanced electrode design that greatly improves energy resolution. We conducted two balloon flights from Fort Sumner, NM, to study the cross strip detector and a standard planar detector both sensitive in the energy range of 20-350 keV. The flights utilized a total of seven shielding schemes: 3 passive, 2 active and 2 hybrid passive-active. In the active shielding modes, the anti- coincidence shield pulse heights were telemetered for each CZT event, allowing us to study the effect of the shield's energy threshold on the spectral shape and magnitude of the background. We are also developing an energy-dependent background rejection technique based on the charge collection properties of the CZT detector. This technique employs the depth of interaction, as inferred by the ratio of cathode to anode pulse height, to reject events inconsistent with incident source x-rays. The long duration of the May flight enabled us to study activation effects. We present result of the effectiveness of each of the shielding schemes on both detectors, the rejection power of depth of interaction technique on the crossed strip detector, inferred aperture background flux and the level of activation after 22 hours as float.

Paper Details

Date Published: 22 October 1999
PDF: 10 pages
Proc. SPIE 3765, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy X, (22 October 1999); doi: 10.1117/12.366520
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. 3765:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy X
Oswald H. W. Siegmund; Kathryn A. Flanagan, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?