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Proceedings Paper

METIS: a novel coronagraph design for the Solar Orbiter mission
Author(s): Silvano Fineschi; Ester Antonucci; Giampiero Naletto; Marco Romoli; Daniele Spadaro; Gianalfredo Nicolini; Lucia Abbo; Vincenzo Andretta; Alessandro Bemporad; Arkadiusz Berlicki; Gerardo Capobianco; Giuseppe Crescenzio; Vania Da Deppo; Mauro Focardi; Federico Landini; Giuseppe Massone; Marco A. Malvezzi; J. Dan Moses; Piergiorgio Nicolosi; Maurizio Pancrazzi; Maria-Guglielmina Pelizzo; Luca Poletto; Udo H. Schühle; Sami K. Solanki; Daniele Telloni; Luca Teriaca; Michela Uslenghi
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Paper Abstract

METIS (Multi Element Telescope for Imaging and Spectroscopy) METIS, the “Multi Element Telescope for Imaging and Spectroscopy”, is a coronagraph selected by the European Space Agency to be part of the payload of the Solar Orbiter mission to be launched in 2017. The mission profile will bring the Solar Orbiter spacecraft as close to the Sun as 0.3 A.U., and up to 35° out-of-ecliptic providing a unique platform for helio-synchronous observations of the Sun and its polar regions. METIS coronagraph is designed for multi-wavelength imaging and spectroscopy of the solar corona. This presentation gives an overview of the innovative design elements of the METIS coronagraph. These elements include: i) multi-wavelength, reflecting Gregorian-telescope; ii) multilayer coating optimized for the extreme UV (30.4 nm, HeII Lyman-α) with a reflecting cap-layer for the UV (121.6 nm, HI Lyman-α) and visible-light (590-650); iii) inverse external-occulter scheme for reduced thermal load at spacecraft peri-helion; iv) EUV/UV spectrograph using the telescope primary mirror to feed a 1st and 4th-order spherical varied line-spaced (SVLS) grating placed on a section of the secondary mirror; v) liquid crystals electro-optic polarimeter for observations of the visible-light K-corona. The expected performances are also presented.

Paper Details

Date Published: 27 September 2012
PDF: 13 pages
Proc. SPIE 8443, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray, 84433H (27 September 2012); doi: 10.1117/12.927229
Show Author Affiliations
Silvano Fineschi, INAF, Osservatorio Astronomico di Torino (Italy)
Ester Antonucci, INAF, Osservatorio Astronomico di Torino (Italy)
Giampiero Naletto, Univ. degli Studi di Padova (Italy)
Marco Romoli, Univ. degli Studi di Firenze (Italy)
Daniele Spadaro, INAF, Osservatorio Astrofisico di Catania (Italy)
Gianalfredo Nicolini, INAF, Osservatorio Astronomico di Torino (Italy)
Lucia Abbo, INAF, Osservatorio Astronomico di Torino (Italy)
Vincenzo Andretta, INAF, Osservatorio Astronomico di Capodimonte (Italy)
Alessandro Bemporad, INAF, Osservatorio Astronomico di Torino (Italy)
Arkadiusz Berlicki, Astronomical Institute of the ASCR, v.v.i. (Czech Republic)
Gerardo Capobianco, INAF, Osservatorio Astronomico di Torino (Italy)
Giuseppe Crescenzio, INAF, Osservatorio Astronomico di Torino (Italy)
Vania Da Deppo, Consiglio Nazionale delle Ricerche (Italy)
Mauro Focardi, Univ. degli Studi di Firenze (Italy)
Federico Landini, Univ. degli Studi di Firenze (Italy)
Giuseppe Massone, INAF, Osservatorio Astronomico di Torino (Italy)
Marco A. Malvezzi, Univ. degli Studi di Padova (Italy)
J. Dan Moses, U.S. Naval Research Lab. (United States)
Piergiorgio Nicolosi, Univ. degli Studi di Padova (Italy)
Maurizio Pancrazzi, Univ. degli Studi di Firenze (Italy)
Maria-Guglielmina Pelizzo, Consiglio Nazionale delle Ricerche (Italy)
Luca Poletto, Consiglio Nazionale delle Ricerche (Italy)
Udo H. Schühle, Max-Planck-Institut für Sonnensystemforschung (Germany)
Sami K. Solanki, Max-Planck-Institut für Sonnensystemforschung (Germany)
Daniele Telloni, INAF, Osservatorio Astronomico di Torino (Italy)
Luca Teriaca, Max-Planck-Institut für Sonnensystemforschung (Germany)
Michela Uslenghi, INAF/IASF Milano (Italy)


Published in SPIE Proceedings Vol. 8443:
Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray
Tadayuki Takahashi; Stephen S. Murray; Jan-Willem A. den Herder, Editor(s)

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