4MOST fibre feed: performance and final design

Dionne M. Haynes; Allar Saviauk; Andreas Kelz; Roger Haynes; Thomas Jahn; Dennis Plüschke; Swara Rahurkar; Florian Zscheyge; Johannes Piotrowski; Rebecca Brown

doi:10.1117/12.2313704

10 July 2018 4MOST fibre feed: performance and final design

Dionne M. Haynes, Allar Saviauk, Andreas Kelz, Roger Haynes, Thomas Jahn, Dennis Plüschke, Swara Rahurkar, Florian Zscheyge, Johannes Piotrowski, Rebecca Brown

Author Affiliations +

Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII; 1070289 (2018) https://doi.org/10.1117/12.2313704
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

The 4MOST¹ instrument is a multi-object-spectrograph for the ESO-VISTA telescope. The 4MOST long fiber feed links the AESOP² fiber positioner to two low-resolution spectrographs (1624 fibers) and one high-resolution spectrograph (812 fibers). In addition to the 2436 science fibers, the system includes guide fiber bundles, metrology fiducial fibers and simultaneous calibration fibers for the spectrographs. To validate the design approaches, including fiber connectors and cable rotator, pre-production fiber cables have been built and evaluated. This paper presents the near final design of the fiber feed subsystem and its performance results pertaining to throughput homogeneity, focal ratio degradation, and connector loss of the pre-production cables.

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Dionne M. Haynes, Allar Saviauk, Andreas Kelz, Roger Haynes, Thomas Jahn, Dennis Plüschke, Swara Rahurkar, Florian Zscheyge, Johannes Piotrowski, and Rebecca Brown "4MOST fibre feed: performance and final design", Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 1070289 (10 July 2018); https://doi.org/10.1117/12.2313704

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