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Thermal analysis of Bridgman-Stockbarger growthA thermal analysis of a cylindrical HgCdTe sample in a Bridgman-Stockbarger crystal growth configuration was conducted with emphasis on the thermal profile, interface shape and position, and the thermal gradients at the liquid-solid interface. Alloys of HgTe and CdTe with compositions approximating 20 percent CdTe, 80 percent HgTe were used. This composition results in a bandgap suited for the detection of 10.6 micron CO2 radiation. The sensitivity of the sample thermal characteristics to important growth parameters, such as thermal diffusivities, thermal conductivities, furnace temperature profile, ampoule dimensions, and growth velocity was assessed. Numerical techniques and associated computational models necessary to analyze the heat transfer process within the sample and the Bridgman-Stockbarger boundary conditions were developed. This thermal analysis mode was programmed in FORTRAN V, and is currently operational on the MSFC Univac 1100 system.
Document ID
19790012718
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Knopf, F. W. (Guests Associates, Inc. Huntsville, AL, United States)
Date Acquired
September 3, 2013
Publication Date
March 15, 1979
Subject Category
Solid-State Physics
Report/Patent Number
AMD-TR-79-1
NASA-CR-161193
Accession Number
79N20889
Funding Number(s)
CONTRACT_GRANT: NAS8-33204
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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