Continued development of a precision cryogenic dilatometer for the James Webb Space Telescope

Paul B. Karlmann; Matthew J. Dudik; Peter G. Halverson; Marie B. Levine; Martin R. Marcin; Robert D. Peters; Stuart B. Shaklan; David Van Buren

doi:10.1117/12.561342

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30 September 2004 Continued development of a precision cryogenic dilatometer for the James Webb Space Telescope

Paul B. Karlmann, Matthew J. Dudik, Peter G. Halverson, Marie B. Levine, Martin R. Marcin, Robert D. Peters, Stuart B. Shaklan, David Van Buren

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Proceedings Volume 5528, Space Systems Engineering and Optical Alignment Mechanisms; (2004) https://doi.org/10.1117/12.561342
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

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.

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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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