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Development of uniform CdTe pixel detectors based on Caltech ASIC

Oonuki, Kousuke and Inoue, Hokuto and Nakazawa, Kazuhiro and Mitani, Takefumi and Tanaka, Takaaki and Takahashi, Tadayuki and Chen, C. M. H. and Cook, Walter R. and Harrison, Fiona A. (2004) Development of uniform CdTe pixel detectors based on Caltech ASIC. In: High-Energy Detectors in Astronomy. Proceedings of SPIE. No.5501. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 218-228. ISBN 0-8194-5433-8.

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We have developed a large CdTe pixel detector with dimensions of 23.7 x 13.0 mm^2 and a pixel size of 448 x 448 μm^2. The detector is based on recent technologies of an uniform CdTe single crystal, a two-dimensional ASIC, and stud bump-bonding to connect pixel electrodes on the CdTe surface to the ASIC. Good spectra are obtained from 1051 pixels out of total 1056 pixels. When we operate the detector at -50°C, the energy resolution is 0.67 keV and 0.99 keV at 14 keV and 60 keV, respectively. Week-long stability of the detector is confirmed at operating temperatures of both -50°C and -20°C. The detector also shows high uniformity: the peak positions for all pixels agree to within 0.82%, and the average of the energy resolution is 1.04 keV at a temperature of -50°C. When we normalized the peak area by the total counts detected by each pixel, a variation of 2.1% is obtained.

Item Type:Book Section
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Harrison, Fiona A.0000-0003-2992-8024
Additional Information:© 2004 Society of Photo-Optical Instrumentation Engineers (SPIE). 29 September 2004. The authors would like to thank M. Onishi for his dedicated help throughout the detector development.
Group:Space Radiation Laboratory
Subject Keywords:CdTe, CZT, uniformity, hard X-ray detector, pixel detector, stud bump bonding, imaging spectrometer
Series Name:Proceedings of SPIE
Issue or Number:5501
Record Number:CaltechAUTHORS:20180111-080306983
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Official Citation:Kousuke Oonuki, Hokuto Inoue, Kazuhiro Nakazawa, Takefumi Mitani, Takaaki Tanaka, Tadayuki Takahashi, C. M. Hubert Chen, Walter R. Cook, Fiona A. Harrison, "Development of uniform CdTe pixel detectors based on Caltech ASIC", Proc. SPIE 5501, High-Energy Detectors in Astronomy, (29 September 2004); doi: 10.1117/12.552598;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84248
Deposited By: Ruth Sustaita
Deposited On:11 Jan 2018 18:18
Last Modified:15 Nov 2021 20:18

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