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Effects or Proton-Induced Radiation Damage on Cadmium Zinc Telluride Pixel Detectors

Wong, A-S. and Harrison, F. A. and Varnell, L. S. (1996) Effects or Proton-Induced Radiation Damage on Cadmium Zinc Telluride Pixel Detectors. In: Gamma-Ray and Cosmic-Ray Detectors, Techniques, and Missions. Proceedings of SPIE. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 442-448. ISBN 9780819421944.

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Cadmium zinc telluride (CdZnTe) is a room temperature solid state material with many properties attractive to space- borne astrophysical instrumentation. Irradiation of monolithic CdZnTe detectors with 199 MeV protons shows that proton-induced radiation damage causes an increase in electron trapping in the material. Small-pixel and strip CdZnTe detectors which rely on efficient electron collection are particularly sensitive to changes in the electron mean free path, which can result in significant changes in the spectral response. Using a charge transport model, we calculate the effects of the observed radiation damage on spectral response for pixel detectors of several geometries. A degradation in spectral response is observed which is most pronounced for small-pixel detectors. The magnitude of the effects indicate that depending on pixel size and the desire for good spectral performance annealing may be necessary to maintain good detector performance after approximately 1 - 2 years in low-earth orbit.

Item Type:Book Section
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URLURL TypeDescription
Harrison, F. A.0000-0003-2992-8024
Additional Information:SPIE © 1996.
Group:Space Radiation Laboratory
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1996-30
Series Name:Proceedings of SPIE
Record Number:CaltechAUTHORS:20140703-221518819
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46844
Deposited By: Deborah Miles
Deposited On:23 Jul 2014 17:50
Last Modified:10 Nov 2021 17:30

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