8 August 2016 4MOST fiber feed preliminary design: prototype testing and performance
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Abstract
The 4MOST instrument is a multi-object-spectrograph for the ESO-VISTA telescope. The 4MOST fiber feed subsystem is composed of a fiber positioner (AESOP) holding 2436 science fibers based on the Echidna tilting spine concept, and the fiber cable, which feeds two low-resolution spectrographs (1624 fibers) and one high-resolution spectrograph (812 fibers). In order to optimize the fiber feed subsystem design and provide essential information required for the spectrograph design, prototyping and testing has been undertaken. In this paper we give an overview of the current fiber feed subsystem design and present the preliminary FRD, scrambling, throughput and system performance impact results for: maximum and minimum spine tilt, fiber connectors, cable de-rotator simulator for fiber cable lifetime tests.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dionne M. Haynes, Dionne M. Haynes, Andreas Kelz, Andreas Kelz, Samuel C. Barden, Samuel C. Barden, Svend-Marian Bauer, Svend-Marian Bauer, Katjana Ehrlich, Katjana Ehrlich, Roger Haynes, Roger Haynes, Thomas Jahn, Thomas Jahn, Allar Saviauk, Allar Saviauk, Roelof S. de Jong, Roelof S. de Jong, } "4MOST fiber feed preliminary design: prototype testing and performance", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99088I (8 August 2016); doi: 10.1117/12.2232735; https://doi.org/10.1117/12.2232735
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