The Solar Orbiter EUI instrument: The Extreme Ultraviolet Imager

Rochus, P.; Auchère, F.; Berghmans, D.; Harra, L.; Schmutz, W.; Schühle, Udo; Addison, P.; Appourchaux, T.; Aznar Cuadrado, Regina; Baker, D.; Barbay, J.; Bates, D.; BenMoussa, A.; Bergmann, M.; Beurthe, C.; Borgo, B.; Bonte, K.; Bouzit, M.; Bradley, L.; Büchel, V.; Buchlin, E.; Büchner, Jörg; Cabé, F.; Cadiergues, L.; Chaigneau, M.; Chares, Bernd; Cortez, C. Choque; Coker, P.; Condamin, M.; Coumar, S.; Curdt, Werner; Cutler, J.; Davies, D.; Davison, G.; Defise, J.-M.; Zanna, G. Del; Delmotte, F.; Delouille, V.; Dolla, L.; Dumesnil, C.; Dürig, F.; Enge, Rainer; François, S.; Fourmond, J.-J.; Gillis, J.-M.; Giordanengo, B.; Gissot, S.; Green, L. M.; Guerreiro, N.; Guilbaud, A.; Gyo, M.; Haberreiter, M.; Hafiz, A.; Hailey, M.; Halain, J.-P.; Hansotte, J.; Hecquet, C.; Heerlein, Klaus; Hellin, M.-L.; Hemsley, S.; Hermans, A.; Hervier, V.; Hochedez, J.-F.; Houbrechts, Y.; Ihsan, K.; Jacques, L.; Jérôme, A.; Jones, J.; Kahle, Michael; Kennedy, T.; Klaproth, M.; Kolleck, Martin; Koller, S.; Kotsialos, E.; Kraaikamp, E.; Langer, P.; Lawrenson, A.; Le Clech’, J.-C.; Lenaerts, C.; Liebecq, S.; Linder, D.; Long, D. M.; Mampaey, B.; Markiewicz-Innes, D.; Marquet, B.; Marsch, Eckart; Matthews, S.; Mazy, E.; Mazzoli, A.; Meining, Stefan; Meltchakov, E.; Mercier, R.; Meyer, S.; Monecke, M.; Monfort, F.; Morinaud, G.; Moron, F.; Mountney, L.; Müller, R.; Nicula, B.; Parenti, S.; Peter, Hardi; Pfiffner, D.; Philippon, A.; Phillips, I.; Plesseria, J.-Y.; Pylyser, E.; Rabecki, F.; Ravet-Krill, M.-F.; Rebellato, J.; Renotte, E.; Rodriguez, L.; Roose, S.; Rosin, J.; Rossi, L.; Roth, P.; Rouesnel, F.; Roulliay, M.; Rousseau, A.; Ruane, K.; Scanlan, J.; Schlatter, P.; Seaton, D. B.; Silliman, K.; Smit, S.; Smith, P. J.; Solanki, Sami K.; Spescha, M.; Spencer, A.; Stegen, K.; Stockman, Y.; Szwec, N.; Tamiatto, C.; Tandy, J.; Teriaca, Luca; Theobald, C.; Tychon, I.; van Driel-Gesztelyi, L.; Verbeeck, C.; Vial, J.-C.; Werner, S.; West, M. J.; Westwood, D.; Wiegelmann, Thomas; Willis, G.; Winter, B.; Zerr, Andreas; Zhang, X.; Zhukov, A. N.

doi:10.1051/0004-6361/201936663

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The Solar Orbiter EUI instrument: The Extreme Ultraviolet Imager

MPS-Authors

/persons/resource/persons104197

Schühle, Udo
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103818

Aznar Cuadrado, Regina
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103851

Büchner, Jörg
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons221122

Chares, Bernd
Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103872

Curdt, Werner
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103905

Enge, Rainer
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103956

Heerlein, Klaus
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103997

Kahle, Michael
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

Klaproth, M.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104018

Kolleck, Martin
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

Markiewicz-Innes, D.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104072

Marsch, Eckart
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104085

Meining, Stefan
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

Meyer, S.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

Monecke, M.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

Müller, R.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104124

Peter, Hardi
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104218

Solanki, Sami K.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104241

Teriaca, Luca
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

Werner, S.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104290

Wiegelmann, Thomas
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104313

Zerr, Andreas
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

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Citation

Rochus, P., Auchère, F., Berghmans, D., Harra, L., Schmutz, W., Schühle, U., et al. (2020). The Solar Orbiter EUI instrument: The Extreme Ultraviolet Imager. Astronomy and Astrophysics, 642: A8. doi:10.1051/0004-6361/201936663.

Cite as: https://hdl.handle.net/21.11116/0000-0007-5066-C

Abstract

Context. The Extreme Ultraviolet Imager (EUI) is part of the remote sensing instrument package of the ESA/NASA Solar Orbiter mission that will explore the inner heliosphere and observe the Sun from vantage points close to the Sun and out of the ecliptic. Solar Orbiter will advance the “connection science” between solar activity and the heliosphere.

Aims. With EUI we aim to improve our understanding of the structure and dynamics of the solar atmosphere, globally as well as at high resolution, and from high solar latitude perspectives.

Methods. The EUI consists of three telescopes, the Full Sun Imager and two High Resolution Imagers, which are optimised to image in Lyman-α and EUV (17.4 nm, 30.4 nm) to provide a coverage from chromosphere up to corona. The EUI is designed to cope with the strong constraints imposed by the Solar Orbiter mission characteristics. Limited telemetry availability is compensated by state-of-the-art image compression, onboard image processing, and event selection. The imposed power limitations and potentially harsh radiation environment necessitate the use of novel CMOS sensors. As the unobstructed field of view of the telescopes needs to protrude through the spacecraft’s heat shield, the apertures have been kept as small as possible, without compromising optical performance. This led to a systematic effort to optimise the throughput of every optical element and the reduction of noise levels in the sensor.

Results. In this paper we review the design of the two elements of the EUI instrument: the Optical Bench System and the Common Electronic Box. Particular attention is also given to the onboard software, the intended operations, the ground software, and the foreseen data products.

Conclusions. The EUI will bring unique science opportunities thanks to its specific design, its viewpoint, and to the planned synergies with the other Solar Orbiter instruments. In particular, we highlight science opportunities brought by the out-of-ecliptic vantage point of the solar poles, the high-resolution imaging of the high chromosphere and corona, and the connection to the outer corona as observed by coronagraphs.