Noise reduction in CdZnTe coplanar-grid detectors

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Noise measurements on CdZnTe detectors show that the main sources of detector-related noise are shot noise due to bulk leakage current and 1/f noise due to the detector surfaces. The magnitude of surface leakage current appears to have little or no effect on the detector noise. Measurements on guard-ring devices fabricated using gold-evaporated contacts show that the contacts behave as Schottky barriers, and the bulk current at typical operating voltages is likely dependent on the contact properties rather than directly on the material's bulk resistivity. This also suggests that the level of shot noise is affected by the detector contacts ... continued below

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4 pages

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Luke, Paul N.; Lee, Julie S.; Amman, Mark & Yu, Kin M. November 15, 2001.

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Noise measurements on CdZnTe detectors show that the main sources of detector-related noise are shot noise due to bulk leakage current and 1/f noise due to the detector surfaces. The magnitude of surface leakage current appears to have little or no effect on the detector noise. Measurements on guard-ring devices fabricated using gold-evaporated contacts show that the contacts behave as Schottky barriers, and the bulk current at typical operating voltages is likely dependent on the contact properties rather than directly on the material's bulk resistivity. This also suggests that the level of shot noise is affected by the detector contacts and not necessarily by the material's bulk resistivity. A significant reduction in the noise of coplanar-grid detectors has been obtained using a modified contact fabrication process.

Physical Description

4 pages

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INIS; OSTI as DE00790031

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  • IEEE Nuclear Science Symposium, Room Temperature Radiation Detector Workshop, San Diego, CA (US), 11/05/2001--11/09/2001

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  • Report No.: LBNL--49163
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 790031
  • Archival Resource Key: ark:/67531/metadc717983

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • November 15, 2001

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • April 4, 2016, 1:46 p.m.

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Luke, Paul N.; Lee, Julie S.; Amman, Mark & Yu, Kin M. Noise reduction in CdZnTe coplanar-grid detectors, article, November 15, 2001; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc717983/: accessed October 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.