Testing the 10 spectrograph units for DESI: approach and results

Sandrine Perruchot; Pierre-Éric Blanc; Julien Guy; Laurent Le Guillou; Samuel Ronayette; Xavier Régal; Gérard Castagnoli; Auguste Le Van Suu; Eduardo Sepulveda; Eric Jullo; Jean-Gabriel Cuby; Sonia Karkar; Patrick Ghislain; Philippe Repain; P.-H. Carton; C. Magneville; Anne Ealet; Stéphanie Escoffier; Aurélia Secroun; Klaus Honscheid; Ann Elliott; Patrick Jelinsky; Brooks David; Doel Peter; Y. Duan; J. Edelstein; J. C. Estrada; E. Gastañaga; A. Karcher; M. Landriau; M. Levi; P. Martini; N. Palanque-Delabrouille; F. Prada; G. Tarle; K. Zhang

doi:10.1117/12.2561275

13 December 2020 Testing the 10 spectrograph units for DESI: approach and results

Sandrine Perruchot, Pierre-Éric Blanc, Julien Guy, Laurent Le Guillou, Samuel Ronayette, Xavier Régal, Gérard Castagnoli, Auguste Le Van Suu, Eduardo Sepulveda, Eric Jullo, Jean-Gabriel Cuby, Sonia Karkar, Patrick Ghislain, Philippe Repain, P.-H. Carton, C. Magneville, Anne Ealet, Stéphanie Escoffier, Aurélia Secroun, Klaus Honscheid, Ann Elliott, Patrick Jelinsky, Brooks David, Doel Peter, Y. Duan, J. Edelstein, J. C. Estrada, E. Gastañaga, A. Karcher, M. Landriau, M. Levi, P. Martini, N. Palanque-Delabrouille, F. Prada, G. Tarle, K. Zhang

Author Affiliations +

Proceedings Volume 11447, Ground-based and Airborne Instrumentation for Astronomy VIII; 1144786 (2020) https://doi.org/10.1117/12.2561275
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

The recently commissioned Dark Energy Spectroscopic Instrument (DESI) will measure the expansion history of the Universe using the Baryon Acoustic Oscillation technique. The spectra of 35 million galaxies and quasars over 14000 sqdeg will be measured during the life of the experiment. A new prime focus corrector for the KPNO Mayall telescope delivers light to 5000 fiber optic positioners. The fibers in turn feed ten broad-band spectrographs. A consortium of Aix-Marseille University (AMU) and CNRS laboratories (LAM, OHP and CPPM) together with LPNHE (CNRS, IN2P3, Sorbonne Université and Université de Paris) and the WINLIGHT Systems company based in Pertuis (France), were in charge of integrating and validating the performance requirements of the ten full spectrographs, equipped with their cryostats, shutters and other mechanisms. We present a summary of our activity which allowed an efficient validation of the systems in a short-time schedule. We detail the main results. We emphasize the benefits of our approach and also its limitations.

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Sandrine Perruchot, Pierre-Éric Blanc, Julien Guy, Laurent Le Guillou, Samuel Ronayette, Xavier Régal, Gérard Castagnoli, Auguste Le Van Suu, Eduardo Sepulveda, Eric Jullo, Jean-Gabriel Cuby, Sonia Karkar, Patrick Ghislain, Philippe Repain, P.-H. Carton, C. Magneville, Anne Ealet, Stéphanie Escoffier, Aurélia Secroun, Klaus Honscheid, Ann Elliott, Patrick Jelinsky, Brooks David, Doel Peter, Y. Duan, J. Edelstein, J. C. Estrada, E. Gastañaga, A. Karcher, M. Landriau, M. Levi, P. Martini, N. Palanque-Delabrouille, F. Prada, G. Tarle, and K. Zhang "Testing the 10 spectrograph units for DESI: approach and results", Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 1144786 (13 December 2020); https://doi.org/10.1117/12.2561275

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