2 August 2014 Euclid near infrared spectrophotometer instrument concept and first test results at the end of phase B
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Abstract
The Euclid mission objective is to understand why the expansion of the Universe is accelerating by mapping the geometry of the dark Universe by investigating the distance-redshift relationship and tracing the evolution of cosmic structures. The Euclid project is part of ESA's Cosmic Vision program with its launch planned for 2020. The NISP (Near Infrared Spectro-Photometer) is one of the two Euclid instruments and is operating in the near-IR spectral region (0.9-2μm) as a photometer and spectrometer. The instrument is composed of: - a cold (135K) optomechanical subsystem consisting of a SiC structure, an optical assembly (corrector and camera lens), a filter wheel mechanism, a grism wheel mechanism, a calibration unit and a thermal control system - a detection subsystem based on a mosaic of 16 Teledyne HAWAII2RG cooled to 95K with their front-end readout electronic cooled to 140K, integrated on a mechanical focal plane structure made with Molybdenum and Aluminum. The detection subsystem is mounted on the optomechanical subsystem structure - a warm electronic subsystem (280K) composed of a data processing / detector control unit and of an instrument control unit that interfaces with the spacecraft via a 1553 bus for command and control and via Spacewire links for science data This presentation describes the architecture of the instrument at the end of the phase B (Preliminary Design Review), the expected performance, the technological key challenges and preliminary test results obtained on a detection system demonstration model.
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Thierry Maciaszek, Anne Ealet, Knud Jahnke, Eric Prieto, Rémi Barbier, Yannick Mellier, Anne Costille, Franck Ducret, Christophe Fabron, Jean-Luc Gimenez, Robert Grange, Laurent Martin, Christelle Rossin, Tony Pamplona, Pascal Vola, Jean Claude Clémens, Gérard Smadja, Jérome Amiaux, Jean Christophe Barrière, Michel Berthe, Adriano De Rosa, Enrico Franceschi, Gianluca Morgante, Massimo Trifoglio, Luca Valenziano, Carlotta Bonoli, Favio Bortoletto, Maurizio D'Alessandro, Leonardo Corcione, Sebastiano Ligori, Bianca Garilli, Marco Riva, Frank Grupp, Carolin Vogel, Felix Hormuth, Gregor Seidel, Stefanie Wachter, Jose Javier Diaz, Ferran Grañena, Cristobal Padilla, Rafael Toledo, Per B. Lilje, Bjarte G. B. Solheim, Corinne Toulouse-Aastrup, Michael Andersen, Warren Holmes, Ulf Israelsson, Michael Seiffert, Carissa Weber, Augustyn Waczynski, René J. Laureijs, Giuseppe Racca, Jean-Christophe Salvignol, Paolo Strada, "Euclid near infrared spectrophotometer instrument concept and first test results at the end of phase B", Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 91430K (2 August 2014); doi: 10.1117/12.2056702; https://doi.org/10.1117/12.2056702
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