1. Fibre links for the WEAVE instrument: the making of
- Author
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Julien Gaudemard, Philippe Laporte, Scott Trager, Youssef Younes, Remko Stuik, Patrice Barroso, Basile-Thierry Melse, Ellen Schallig, Georgia Bishop, Florent Reix, Sébastien Croce, Antonella Vallenari, Sébastien Blanc, Camille Noûs, Elisabetta Caffau, Gavin Dalton, Don Carlos Abrams, D. Horville, Esperanza Carrasco, Ian Lewis, P. Bonifacio, J. Alfonso L. Aguerri, Kevin Middleton, Stéphane Dorent, Gilles Fasola, Shan Mignot, Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), and Astronomy
- Subjects
Engineering drawing ,Schedule ,Optical fiber ,optical fibers ,Computer science ,02 engineering and technology ,fabrication ,01 natural sciences ,multi-object spectroscopy ,Field (computer science) ,law.invention ,Procurement ,law ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Fiber ,Project management ,010303 astronomy & astrophysics ,Spectrograph ,Focus (computing) ,WEAVE ,[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] ,business.industry ,William Herschel Telescope ,project management ,020201 artificial intelligence & image processing ,business ,verification - Abstract
International audience; 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.
- Published
- 2020
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