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- W2189169249 abstract "A novel cryogenic refocussing mechanism (RMA) has been designed by Selex Galileo for the Near Infra-Red Spectrograph (NIRSpec) of the James Webb Space Telescope (JWST). The RMA shall refocus the NIRSpec by a rigid translation of a set of two mirrors in a 6 mm range, with an accuracy of 50 microns and 15 microns step size. The design was driven by the operation in performance at 30K temperature while being still fully functional at room temperature, by the need to incorporate two mirrors as part of the mechanism and by the tight envelope constraints. This paper reports the verification campaigns carried out separately on the qualification model and on the life-test model in order to validate the RMA design, the main findings and lessons learned." @default.
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- W2189169249 date "2009-01-01" @default.
- W2189169249 modified "2023-09-26" @default.
- W2189169249 title "THE CRYOGENIC REFOCUSSING MECHANISM OF NIRSPEC - DESIGN VALIDATION BY TESTING OF THE QUALIFICATION AND LIFE TEST MODELS" @default.
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