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Proceedings Paper

Optical pyrometry on TEMPUS: a critical assessment of noncontact temperature measurement in low earth orbit
Author(s): William Hofmeister; R. J. Bayuzick; Shankar Krishnan
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Paper Abstract

The German Space Agency (DLT) commissioned Dornier GmbH to construct the Tiegelfreies Electromagnetisches Prozessieren unter Schwerelosigkeit (TEMPUS) facility for conducting containerless experiments on metallic samples in low earth orbit. TEMPUS, utilizing electromagnetic positioning and heating, was flown on the IML-2 Spacelab mission in July 1994 and is scheduled to fly again on the MSL-1 mission in March of 1997. TEMPUS requires non contact temperature measurement. In particular, nucleation and heat capacity measurements have special requirements for accurate temperature measurement. For these measurements, the facility has optical pyrometer capabilities at the specific wavelength of 633nm as well as the integrated wavelength ranges of 1000 to 2500 nm and 3000 to 4000 nm. The instrument and calibration procedures are described herein. The uncertainty in the temperature measurement on TEMPUS has been quantified, and the implications on the accuracy of nucleation and heat capacity measurements is discussed.

Paper Details

Date Published: 12 July 1996
PDF: 15 pages
Proc. SPIE 2809, Space Processing of Materials, (12 July 1996); doi: 10.1117/12.244342
Show Author Affiliations
William Hofmeister, Vanderbilt Univ. (United States)
R. J. Bayuzick, Vanderbilt Univ. (United States)
Shankar Krishnan, Containerless Research, Inc. (United States)

Published in SPIE Proceedings Vol. 2809:
Space Processing of Materials
Narayanan Ramachandran, Editor(s)

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