29 October 1999 Postupgrade performance of the 3.8-m United Kingdom Infrared Telescope (UKIRT)
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Abstract
The upgraded 3.8 m UK Infrared Telescope is now provided with: (1) tip-tilt image stabilization by a light-weighted secondary mirror on piezo-electric actuators, controlled by a fast guider sampling at >= 40 Hz on guide stars V m6; (2) active primary mirror figure and secondary mirror alignment control, via a regularly-maintained look-up table; (3) active focus measurements and correction by the fast guider, supplementing a focus maintenance model which corrects for elastic and thermal changes; (4) ventilation of the 2600 m3 dome by 16 apertures totalling 50 m2; (5) insulation of the underside of the concrete dome floor; and (6) internal air circulation during the day, to reduce heating of the upper telescope steelwork.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Timothy G. Hawarden, Timothy G. Hawarden, Nicholas P. Rees, Nicholas P. Rees, Timothy C. Chuter, Timothy C. Chuter, Antonio C. Chrysostomou, Antonio C. Chrysostomou, Charles P. Cavedoni, Charles P. Cavedoni, Ralf-Rainer Rohloff, Ralf-Rainer Rohloff, Eckhart Pitz, Eckhart Pitz, Donald G. Pettie, Donald G. Pettie, Richard J. Bennett, Richard J. Bennett, Eli Ettedgui-Atad, Eli Ettedgui-Atad, } "Postupgrade performance of the 3.8-m United Kingdom Infrared Telescope (UKIRT)", Proc. SPIE 3785, Advanced Telescope Design, Fabrication, and Control, (29 October 1999); doi: 10.1117/12.367622; https://doi.org/10.1117/12.367622
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