An easily scalable Theta/Phi fiber positioner to reduce risks, lead times, and costs for multi-object spectrographs

Luzius Kronig; Stefane Caseiro; Markus Hug; Majid Charif; Mohamed Bouri; Jean-Paul Kneib

doi:10.1117/12.2562717

13 December 2020 An easily scalable Theta/Phi fiber positioner to reduce risks, lead times, and costs for multi-object spectrographs

Luzius Kronig, Stefane Caseiro, Markus Hug, Majid Charif, Mohamed Bouri, Jean-Paul Kneib

Author Affiliations +

Proceedings Volume 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV; 1145125 (2020) https://doi.org/10.1117/12.2562717
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

This paper presents the design and performance of an easily scalable Theta/Phi fiber positioner for Multi-subject Spectrographs. It has been developed by Ecole Polytechnique Federale de Lausanne (EPFL) together with the Swiss manufacturer of miniature microsystems MPS Microsystems. The positioner has been designed with the purpose of adapting readily to the requirements of any Multi-Object Spectrograph, which requires precise positioning of optical fibers. Whether MOONS, COBRA, MEGARA, or DESI, each project has so far developed its own fiber positioner from scratch, with all of the risks linked to such a complete new development. The positioner presented in the current paper intends to significantly reduce the development time, costs, and eliminate unforeseen risks. The design is easily scalable in size, length, and shape. For validation, we built eight prototypes with a diameter of 9.5mm which are capable to reach any target within five micrometers with just two correction moves.

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Citation Download Citation

Luzius Kronig, Stefane Caseiro, Markus Hug, Majid Charif, Mohamed Bouri, and Jean-Paul Kneib "An easily scalable Theta/Phi fiber positioner to reduce risks, lead times, and costs for multi-object spectrographs", Proc. SPIE 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV, 1145125 (13 December 2020); https://doi.org/10.1117/12.2562717

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