Development of CZT Detectors for X-ray and Gamma-ray Astronomy

被引：1
|
作者：
Lee, Kuen [1 ]
Martin, J. W. [1 ]
Garson, A. B., III [1 ]
Guo, Q. [1 ]
Matteson, J. [2 ]
Groza, M. [3 ]
Beilicke, M. [1 ]
Burger, A. [3 ]
de Geronimo, G. [4 ]
Krawczynski, H. [1 ]
机构：
[1] Washington Univ, 1 Brookings Dr,CB 1105, St Louis, MO 63130 USA
[2] Univ Calif San Diego, La Jolla, CA 92093 USA
[3] Fisk Univ, Nashville, TN 37208 USA
[4] Brookhaven Natl Lab, Upton, NY 11973 USA
来源：
HARD X-RAY, GAMMA-RAY, AND NEUTRON DETECTOR PHYSICS XIII | 2011年 / 8142卷
关键词：
CZT; X-ray Detector; Pixel Detector; Cross-Strip Detector; Steering Grid; Hard X-ray Polarimeter;
D O I：
10.1117/12.893595
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Cadmium Zinc Telluride (CZT) is the detector material of choice for the detection of X-rays in the 10 keV-1MeV energy band with excellent spatial and energy resolutions and without cryogenic cooling. In this contribution, we report on recent results of the CZT detector development program and several astrophysical experiments which make use of CZT detectors. In the first part of the paper, we discuss the performance of pixel and cross-strip CZT detectors read out with an ASIC developed at the Brookhaven National Laboratory. Our pixel detectors achieve some of the best energy resolutions reported in the literature. Cross-strip detectors are found to give an inferior performance and we investigate the reason for this performance difference. We also present results from a precision measurement of the effect of a steering grid on multi-pixel events obtained with a 200 micrometer collimator. In the second part of the paper, we describe the design and performance of the hard X-ray polarimeter X-Calibur. The polarimeter uses a 14 cm long scintillator scatterer, surrounded by an assembly of 32 2-5 mm thick CZT detectors. We discuss the sensitivity of the polarimeter to measure the linear polarization of 10 keV-80 keV X-rays on short and long balloon flights and results from testing the polarimeter in the laboratory.
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页数：10
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