Status of NTD Ge bolometer material and devices

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This status report is a direct follow-up to the presentation given at the first IR Detector Technology Workshop which took place at NASA Ames Research Center on July 12 and 13, 1983. The conclusions which we presented at that meeting are still fully valid. In the meantime we have learned more about the physics of hopping conduction at very low temperatures which will be important for bolometer design and operation at ever decreasing temperatures. Resistivity measurements have been extended down to 50 mK. At such low temperatures, precise knowledge of the neutron capture cross sections sigma/sub n/ of the various ... continued below

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Pages: 15

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Haller, E.E.; Haegel, N.M. & Park, I.S. August 1, 1985.

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Description

This status report is a direct follow-up to the presentation given at the first IR Detector Technology Workshop which took place at NASA Ames Research Center on July 12 and 13, 1983. The conclusions which we presented at that meeting are still fully valid. In the meantime we have learned more about the physics of hopping conduction at very low temperatures which will be important for bolometer design and operation at ever decreasing temperatures. Resistivity measurements have been extended down to 50 mK. At such low temperatures, precise knowledge of the neutron capture cross sections sigma/sub n/ of the various Ge isotopes is critical if one is to make an accurate prediction of the dopant concentrations and compensation, and therefore resistivity, that will result from a given irradiation. We describe an empirical approach for obtaining the desired resistivity material and are in the process of conducting a set of experiments which will improve the knowledge of the effective sigma/sub n/ values for a given location in a particular reactor. A wider range of NTD Ge samples is now available. Noise measurements on bolometers with ion implanted contacts show that no 1/f noise component appears down to 1 Hz and probably lower. 4 refs., 5 figs.

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Pages: 15

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NTIS, PC A02/MF A01.

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  • IR detector technology workshop, Mountain View, CA, USA, 13 Aug 1985

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  • Other: DE86001988
  • Report No.: LBL-20237
  • Report No.: CONF-8508141-2
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 5049863
  • Archival Resource Key: ark:/67531/metadc1056317

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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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  • August 1, 1985

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  • Jan. 22, 2018, 7:23 a.m.

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  • Jan. 31, 2018, 3:49 p.m.

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Haller, E.E.; Haegel, N.M. & Park, I.S. Status of NTD Ge bolometer material and devices, article, August 1, 1985; Berkeley, California. (https://digital.library.unt.edu/ark:/67531/metadc1056317/: accessed April 20, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.