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6 July 2018 Wide-field infrared survey telescope (WFIRST): composite structure verification for operational temperatures
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The Wide-Field Infrared Survey Telescope (WFIRST) mission is the next large astrophysics observatory for NASA after the James Webb Space Telescope and is the top priority mission from the 2010 National Academy of Sciences’ decadal survey. The WFIRST Optical Telescope Assembly (OTA) includes inherited composite support structures that were originally designed and tested for room temperature operation; however, the WFIRST mission will require operation at colder temperatures to achieve sufficient sensitivity for the infrared wavelengths. We will present the results and conclusions of testing completed at the coupon and engineering model level to verify that the inherited composite structures will maintain mechanical integrity and performance over the required temperature range. The testing included: (1) characterization testing of constituent material coupons, (2) thermal cycling and static load testing of a representative aft metering structure (AMS) and forward metering structure (FMS), and (3) thermal cycling and dynamic testing of a representative secondary mirror assembly (SMA).
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James Mondello, Paul Baird, Lisa Bartusek, David Content, Robert Egerman, Marzouk Marzouk, Bonnie Patterson, Thomas Quinzi, Benjamin Rodini, Cory Smiley, and J. Scott Smith "Wide-field infrared survey telescope (WFIRST): composite structure verification for operational temperatures", Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 106982G (6 July 2018);

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