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13 December 2020 Final assembly, metrology, and testing of the WEAVE fibre positioner
Sarah Hughes, Ellen Schallig, Ian J. Lewis, Gavin Dalton, David Terrett, Don Carlos Abrams, J. Alfonso L. Aguerri, Georgia Bishop, Piercarlo Bonifacio, Matthew Brock, Esperanza Carrasco, Kevin Middleton, Scott C. Trager, Antonella Vallenari
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Proceedings Volume 11447, Ground-based and Airborne Instrumentation for Astronomy VIII; 114477R (2020) https://doi.org/10.1117/12.2560331
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only
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Abstract
WEAVE is the new wide-field spectroscopy facility for the prime focus of the William Herschel Telescope at La Palma, Spain. Its fibre positioner is essential for the accurate placement of the spectrograph’s 960 fibre multiplex. We provide an overview of the final assembly and metrology of the fibre positioner, and results of lab commissioning of its robot gantries. A completely new z-gantry for each positioner robot was acquired, with measurements showing a marked improvement in positioning repeatability. We also present the first results of the configuration soft ng, and discuss the metrology procedures that must be repeated after the positioner’s arrival at the observatory.
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Sarah Hughes, Ellen Schallig, Ian J. Lewis, Gavin Dalton, David Terrett, Don Carlos Abrams, J. Alfonso L. Aguerri, Georgia Bishop, Piercarlo Bonifacio, Matthew Brock, Esperanza Carrasco, Kevin Middleton, Scott C. Trager, and Antonella Vallenari "Final assembly, metrology, and testing of the WEAVE fibre positioner", Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 114477R (13 December 2020); https://doi.org/10.1117/12.2560331
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KEYWORDS
Metrology
Calibration
Lanthanum
Spectroscopy
Telescopes
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