Investigations on assembly and coverage for modular focal planes of multiplexed telescopes

18 July 2024 Investigations on assembly and coverage for modular focal planes of multiplexed telescopes

Maxime Rombach, Xiangyu Xu, Ricardo Araujo, Markus Thurneysen, Stefane Caseiro, Corentin Magnenat, Joseph Silber, Malak Galal, David Schlegel, Jean-Paul Kneib

Author Affiliations +

Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 130969V (2024) https://doi.org/10.1117/12.3018315
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

Multiplexed surveys have the ambition to grow larger for the next generation of focal plane instruments. Future projects such as Spec-S5, MUST, and WST have an ever-growing need for multi-object spectroscopy (13,000 - 20,000 simultaneous objects) which demands further investigations of novel focal plane instrumentation. In this paper, we present a rigorous study of focal plane coverage optimization and assembly of triangular modules of alpha-beta fiber positioners with a 6.2 mm pitch. The main focus here is to examine different module arrangements namely, framed, semi-frameless, and fully-frameless assemblies. Framed and semi-frameless describe here the usage of a manufactured focal plate to hold the modules together and provide the correct focus and tilt to the fibers. Work on automatically generating such focal plates for project adaptability and ease of manufacturing will also be presented. On the other hand, the frameless approach proposes a connection method freed from the need of a focal plate. The following paper will also present their capabilities to meet the requirements for focal plane assembly such as focus, tilt and coverage.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Maxime Rombach, Xiangyu Xu, Ricardo Araujo, Markus Thurneysen, Stefane Caseiro, Corentin Magnenat, Joseph Silber, Malak Galal, David Schlegel, and Jean-Paul Kneib "Investigations on assembly and coverage for modular focal planes of multiplexed telescopes", Proc. SPIE 13096, Ground-based and Airborne Instrumentation for Astronomy X, 130969V (18 July 2024); https://doi.org/10.1117/12.3018315

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