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Title: Continued development of a precision cryogenic dilatometer for the James Webb Space Telescope
Authors: Karlmann, Paul B.
Dudik, Matthew J.
Halverson, Peter G.
Levine, Marie
Marcin, Martin
Peters, Robert D.
Shaklan, Stuart
Van Buren, David
Keywords: coefficient of thermal expansion
thermal strain
fused silica
Issue Date: 24-Aug-2004
Publisher: Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004.
Citation: SPIE 49th Annual Meeting, Denver, Colorado, August 2 - 6, 2004
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.
Appears in Collections:JPL TRS 1992+

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