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Proceedings Paper

Bulk growth of II-VI crystals in the microgravity environment of USML-1
Author(s): Donald C. Gillies; Sandor L. Lehoczky; Frank R. Szofran; David J. Larson; Ching-Hua Su; Yi-Gao Sha; Helga A. Alexander
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Paper Abstract

The first United States Microgravity Laboratory Mission (USML-1) flew in June 1992 on the Space Shuttle Columbia. An important part of this SpaceLab mission was the debut of the Crystal Growth Furnace. Of the seven samples growth in the furnace, three were bulk grown II-VI compounds, two of a cadmium zinc telluride alloy, and one of a mercury zinc telluride alloy. Ground based results are presented, together with the results of computer simulated growths of these experimental conditions. Preliminary characterization results for the three USML-1 growth runs are also presented and the flight sample characteristics are compared to the equivalent ground truth samples. Of particular interest are the effect of the containment vessel on surface features, and especially on the nucleation, and the effect of the gravity vector on radial and axial compositional variations and stress and defect levels.

Paper Details

Date Published: 7 December 1993
PDF: 12 pages
Proc. SPIE 2021, Growth and Characterization of Materials for Infrared Detectors, (7 December 1993); doi: 10.1117/12.164940
Show Author Affiliations
Donald C. Gillies, NASA Marshall Space Flight Ctr. (United States)
Sandor L. Lehoczky, NASA Marshall Space Flight Ctr. (United States)
Frank R. Szofran, NASA Marshall Space Flight Ctr. (United States)
David J. Larson, Grumman Corporate Research Ctr. (United States)
Ching-Hua Su, Universities Space Research Association (United States)
Yi-Gao Sha, Universities Space Research Association (United States)
Helga A. Alexander, Science and Technology Corp. (United States)


Published in SPIE Proceedings Vol. 2021:
Growth and Characterization of Materials for Infrared Detectors
Randolph E. Longshore; Jan W. Baars, Editor(s)

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