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30 September 2004 Continued development of a precision cryogenic dilatometer for the James Webb Space Telescope
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Abstract
As part of the James Webb Space Telescope (JWST) materials working group, a novel cryogenic dilatometer was designed and built at NASA Jet Propulsion Laboratory to help address stringent coefficient of thermal expansion (CTE) knowledge requirements. Previously reported results and error analysis have estimated a CTE measurement accuracy for ULE of 1.7 ppb/K with a 20K thermal load and 0.1 ppb/K with a 280K thermal load. Presented here is a further discussion of the cryogenic dilatometer system and a description of recent work including system modifications and investigations.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Paul B. Karlmann, Matthew J. Dudik, Peter G. Halverson, Marie B. Levine, Martin R. Marcin, Robert D. Peters, Stuart B. Shaklan, and David Van Buren "Continued development of a precision cryogenic dilatometer for the James Webb Space Telescope", Proc. SPIE 5528, Space Systems Engineering and Optical Alignment Mechanisms, (30 September 2004); https://doi.org/10.1117/12.561342
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