Design and functional tests of the Euclid grism mount
| Autor: | Robert Grange, Anne Costille, W. Ceria, Ch. Rossin, P. Sanchez, A. Caillat |
|---|---|
| Přispěvatelé: | Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Wavefront
Physics Cosmic Vision business.industry Dark matter Astrophysics::Instrumentation and Methods for Astrophysics Context (language use) Astrophysics::Cosmology and Extragalactic Astrophysics 7. Clean energy Redshift Grism Optics Baryon acoustic oscillations Astrophysics::Earth and Planetary Astrophysics [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] business Adaptive optics |
| Zdroj: | Proc.SPIE Int.Soc.Opt.Eng. International Conference on Space Optics International Conference on Space Optics, Oct 2016, Biarritz, France. pp.105634W, ⟨10.1117/12.2304070⟩ |
| DOI: | 10.1117/12.2304070⟩ |
| Popis: | International audience; The Euclid mission selected by ESA in the Cosmic Vision program is dedicated to understand dark energy and dark matter. One of the probes based on detection of Baryonic Acoustic Oscillations required the redshift of millions of galaxies. This massive spectroscopic survey relies on the Near Infrared SpectroPhotometer (NISP) using grism in slitless mode. In this Euclid NISP context, we designed a cryogenic mount for the four grisms of the spectroscopic channel. This mount has to maintain optical performances and alignment at the cryogenic temperature of 120K and to survive launch vibrations. Due to a very small mass and volume budget allowed in the Grism Wheel Assembly our design relies on a weight relief Invar ring glued to the grism by tangential flexures. Tangential flexures have the advantage of small height but the drawback of less decoupling capabilities than bipods. We will present the design of the mount and the integration and functional tests to stay within the 60 nm RMS transmitted wavefront error budget allowed to the grism. |
| Databáze: | OpenAIRE |
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