19 August 2014 Jitter studies for the secondary and tertiary mirror systems on the Thirty Meter Telescope
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Abstract
The Secondary Mirror System (M2S) and Tertiary Mirror System (M3S) of the Thirty Meter Telescope (TMT) consist of passively mounted mirrors supported in kinematic cell assemblies that are moved during telescope tracking to counteract effects of changing zenith angle and thermal gradients within the telescope structure. TMT is concerned that the requirements for pointing jitter during Adaptive Optics tracking for the M2 and M3 Systems are very challenging with a risk of requiring complex stabilization systems for compliance. Both systems were researched to determine whether similar un-stabilized hardware exists that can meet the TMT jitter requirements. Tests using representative TMT tracking motions were then performed to measure jitter on similar existing hardware. The results of these hardware tests have been analyzed. Test results, remaining risk assessment and further testing plans are presented.
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Virginia Ford, Virginia Ford, Christopher Carter, Christopher Carter, Christophe Delrez, Christophe Delrez, Pierluigi Fumi, Pierluigi Fumi, Eric Gabriel, Eric Gabriel, Daniele Gallieni, Daniele Gallieni, } "Jitter studies for the secondary and tertiary mirror systems on the Thirty Meter Telescope", Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91512H (19 August 2014); doi: 10.1117/12.2055036; https://doi.org/10.1117/12.2055036
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