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Proceedings Paper

Laboratory performance testing, installation, and commissioning of the wide field upgrade tracker for the Hobby-Eberly Telescope
Author(s): John Good; John Booth; Mark E. Cornell; Gary J. Hill; Hanshin Lee; Richard Savage; Ronnie Leck; Hermanus Kriel; Martin Landriau
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Paper 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*.

Paper Details

Date Published: 22 July 2014
PDF: 11 pages
Proc. SPIE 9145, Ground-based and Airborne Telescopes V, 914546 (22 July 2014); doi: 10.1117/12.2057113
Show Author Affiliations
John Good, McDonald Observatory, The Univ. of Texas at Austin (United States)
John Booth, McDonald Observatory, The Univ. of Texas at Austin (United States)
Mark E. Cornell, McDonald Observatory, The Univ. of Texas at Austin (United States)
Gary J. Hill, McDonald Observatory, The Univ. of Texas at Austin (United States)
Hanshin Lee, McDonald Observatory, The Univ. of Texas at Austin (United States)
Richard Savage, McDonald Observatory, The Univ. of Texas at Austin (United States)
Ronnie Leck, McDonald Observatory, The Univ. of Texas at Austin (United States)
Hermanus Kriel, McDonald Observatory, The Univ. of Texas at Austin (United States)
Martin Landriau, McDonald Observatory, The Univ. of Texas at Austin (United States)


Published in SPIE Proceedings Vol. 9145:
Ground-based and Airborne Telescopes V
Larry M. Stepp; Roberto Gilmozzi; Helen J. Hall, Editor(s)

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