22 July 2014 Laboratory performance testing, installation, and commissioning of the wide field upgrade tracker for the Hobby-Eberly Telescope
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Abstract
A major upgrade of the HET is in process that increases the pupil size to 10 meters and the field of view to 22’ by replacing the four-mirror corrector and prime focus instrument package to track the sidereal and non-sidereal motions of astronomical targets. To support the new payload a new Tracker, comprising 13 axes, and weighing 20 tons, was designed, built and tested at the University of Texas Center for Electromechanics, in Austin, Texas. It was then disassembled and installed on the HET. Structural modifications were performed on the upper hexagon of the telescope structure to support the net increase of 15% to the total mass of the system and maintain fundamental mode performance of 5Hz. Testing in the laboratory, as well as subsequent commissioning tests on the HET, confirm that the Tracker will position the payload to acquire and track within the specified +/-9.5um de-center, +/-15um de-focus, and +/-4.4 arc-sec tip/tilt requirement*.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
John Good, John Good, John Booth, John Booth, Mark E. Cornell, Mark E. Cornell, Gary J. Hill, Gary J. Hill, Hanshin Lee, Hanshin Lee, Richard Savage, Richard Savage, Ronnie Leck, Ronnie Leck, Hermanus Kriel, Hermanus Kriel, Martin Landriau, Martin Landriau, } "Laboratory performance testing, installation, and commissioning of the wide field upgrade tracker for the Hobby-Eberly Telescope", Proc. SPIE 9145, Ground-based and Airborne Telescopes V, 914546 (22 July 2014); doi: 10.1117/12.2057113; https://doi.org/10.1117/12.2057113
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