Fiber links for the WEAVE instrument: the making of

Shan Mignot; Piercarlo Bonifacio; Gilles Fasola; David Horville; Elisabetta Caffau; Stéphane Dorent; Sébastien Croce; Sébastien Blanc; Basile-Thierry Melse; Youssef Younès; Florent Reix; Julien Gaudemard; Gavin Dalton; Ellen Schallig; Ian Lewis; Remko Stuik; Kevin Middleton; Georgia Bishop; Don Carlos Abrams; Scott Trager; J. Alfonso Aguerri; Esperanza Carrasco; Antonella Vallenari; Philippe Laporte; Patrice Barroso; Camille Noûs

doi:10.1117/12.2562305

13 December 2020 Fiber links for the WEAVE instrument: the making of

Shan Mignot, Piercarlo Bonifacio, Gilles Fasola, David Horville, Elisabetta Caffau, Stéphane Dorent, Sébastien Croce, Sébastien Blanc, Basile-Thierry Melse, Youssef Younès, Florent Reix, Julien Gaudemard, Gavin Dalton, Ellen Schallig, Ian Lewis, Remko Stuik, Kevin Middleton, Georgia Bishop, Don Carlos Abrams, Scott Trager, J. Alfonso Aguerri, Esperanza Carrasco, Antonella Vallenari, Philippe Laporte, Patrice Barroso, Camille Noûs

Author Affiliations +

Proceedings Volume 11450, Modeling, Systems Engineering, and Project Management for Astronomy IX; 114502F (2020) https://doi.org/10.1117/12.2562305
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

The WEAVE instrument nearing completion for the William Herschel Telescope is a fiber-fed spectrograph operating in three different modes. Two comprise deployable fibers at the prime focus for point-like objects and small integral field units (IFU), the third is a large IFU placed at the center of the field. Three distinct fiber systems support these modes and route the photons to the spectrograph located on the Nasmyth platform 33m away: the first features 960+940 fibers and is duplicated to allow configuring the fibers on one plate while observation is carried out on the other, the second has 20 hexagonal IFUs featuring 37 fibers each, the third is a large array of 609 fibers with twice the former’s diameter. The large number of fibers and the diversity of their instantiation have made procurement of the parts and assembly of the custom cables a challenge. They involve project partners in France, the UK and the Netherlands and industrial partners in France, Canada, the USA and China to combine know-how and compress the schedule by parallelizing assembly of the cables. Besides the complex management that this induces, it has called for revising the fibers’ handling to relax tolerances and for a rigorous assessment of the conformity of the products. This paper tells the story of the making of the fiber links, presents the overall organization of the procurement and assembly chains together with the inspection and testing allowing for assessing the conformance of the hardware delivered.

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Shan Mignot, Piercarlo Bonifacio, Gilles Fasola, David Horville, Elisabetta Caffau, Stéphane Dorent, Sébastien Croce, Sébastien Blanc, Basile-Thierry Melse, Youssef Younès, Florent Reix, Julien Gaudemard, Gavin Dalton, Ellen Schallig, Ian Lewis, Remko Stuik, Kevin Middleton, Georgia Bishop, Don Carlos Abrams, Scott Trager, J. Alfonso Aguerri, Esperanza Carrasco, Antonella Vallenari, Philippe Laporte, Patrice Barroso, and Camille Noûs "Fiber links for the WEAVE instrument: the making of", Proc. SPIE 11450, Modeling, Systems Engineering, and Project Management for Astronomy IX, 114502F (13 December 2020); https://doi.org/10.1117/12.2562305

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