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GMTIFS: Cryogenic rotary mechanisms for the GMT Integral-Field Spectrograph

Hart, John; Espeland, Brady; Bloxham, Gabe; Boz, Robert; Bundy, Dave; Davies, John; Fordham, Bartholomew; Herald, Nick; Sharp, Robert; Vaccarella, Annino; Vest, Colin


A representative range of the rotary mechanisms proposed for use in GMTIFS is described. All are driven by cryogenically rated stepper motors. For each mechanism, angular position is measured by means of eddy current sensors arranged to function as a resolver. These measure the linear displacement of a decentered aluminum alloy target in two orthogonal directions, from which angular position is determined as a function of the displacement ratio. Resolver function and performance is described....[Show more]

CollectionsANU Research Publications
Date published: 2016
Type: Conference paper
Source: Proceedings of SPIE - The International Society for Optical Engineering
DOI: 10.1117/12.2231556
Access Rights: Open Access


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