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Development and qualification of the Feed-Select Mechanism for the Polarimetric and Helioseismic Imager on-board Solar Orbiter

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Staub,  Jan
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

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Oberdorfer,  Dietmar
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

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

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

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Grauf,  Bianca
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

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Hirzberger,  Johann
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

Mueller,  Marc F.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

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Woch,  Joachim
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

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Citation

Staub, J., Oberdorfer, D., Deutsch, W., Gandorfer, A. M., Grauf, B., Hirzberger, J., et al. (2019). Development and qualification of the Feed-Select Mechanism for the Polarimetric and Helioseismic Imager on-board Solar Orbiter. CEAS Space Journal, 11(4), 497-505. doi:10.1007/s12567-019-00246-y.


Cite as: http://hdl.handle.net/21.11116/0000-0003-9089-F
Abstract
The Solar Orbiter Polarimetric and Helioseismic Imager (SO/PHI) will provide maps of the magnetic vector and of the line-of-sight velocities in the solar photosphere. For reaching its science goals, SO/PHI is equipped with two telescopes: the high resolution channel (HRT) and the full disk channel (FDT). Since both optical channels are fed into a common path including the camera, the need arises for a highly precise mechanism, which selects only one telescope at a time: the Feed-Select Mechanism (FSM). The mechanism therefore needs to serve two purposes: (1) directing one channel towards the camera, (2) shutting the second channel to not disturb the measurement of the observing channel. In this paper we will describe the different design features, as well as the design verification and qualification of the mechanism.