Calibration at elevation of the WEAVE fibre positioner

Sarah Hughes; Gavin Dalton; Kevin Dee; Don Carlos Abrams; Kevin Middleton; Ian Lewis; David Terrett; Alfonso L. Aguerri; Marc Balcells; Georgia Bishop; Piercarlo Bonifacio; Esperanza Carrasco; Scott C. Trager; Antonella Vallenari

doi:10.1117/12.2627132

29 August 2022 Calibration at elevation of the WEAVE fibre positioner

Sarah Hughes, Gavin Dalton, Kevin Dee, Don Carlos Abrams, Kevin Middleton, Ian Lewis, David Terrett, Alfonso L. Aguerri, Marc Balcells, Georgia Bishop, Piercarlo Bonifacio, Esperanza Carrasco, Scott C. Trager, Antonella Vallenari

Author Affiliations +

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 121846J (2022) https://doi.org/10.1117/12.2627132
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

WEAVE is the new wide-field spectroscopy facility^1,2,3 for the prime focus of the William Herschel Telescope in 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 recent maintenance, flexure modifications, and calibration measurements conducted at the observatory prior to the final top-end assembly. This work ensures that we have a complete understanding of the positioner’s behaviour as it changes orientation during observations. All fibre systems have been inspected and repaired, and the tumbler structure contains new clamps to stiffen both the internal beam and the retractor support disk onto which the field plates attach. We present the updated metrology procedures4 and results that will be verified on-sky

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Sarah Hughes, Gavin Dalton, Kevin Dee, Don Carlos Abrams, Kevin Middleton, Ian Lewis, David Terrett, Alfonso L. Aguerri, Marc Balcells, Georgia Bishop, Piercarlo Bonifacio, Esperanza Carrasco, Scott C. Trager, and Antonella Vallenari "Calibration at elevation of the WEAVE fibre positioner", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 121846J (29 August 2022); https://doi.org/10.1117/12.2627132

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