Field retermination of APOGEE spectrograph MTP fiber connectors

John C. Wilson; Dan Rocheleau; John Fox; Louis Green; Donald Harkins; Dirk Schoellner; Stuart Melton; Lori Seagle; Zane Fitzgerald; David Nidever; Nathan De Lee; Jon Holtzman; Emily Farr; Sarah Tuttle; Audrey Oravetz; Katie Grabowski; Kaike Pan; Dmitry Bizyaev; Jamey Eriksen; Stefanie Wachter; Solange Ramirez; Juna Kollmeier

doi:10.1117/12.2630327

29 August 2022 Field retermination of APOGEE spectrograph MTP fiber connectors

John C. Wilson, Dan Rocheleau, John Fox, Louis Green, Donald Harkins, Dirk Schoellner, Stuart Melton, Lori Seagle, Zane Fitzgerald, David Nidever, Nathan De Lee, Jon Holtzman, Emily Farr, Sarah Tuttle, Audrey Oravetz, Katie Grabowski, Kaike Pan, Dmitry Bizyaev, Jamey Eriksen, Stefanie Wachter, Solange Ramirez, Juna Kollmeier

Author Affiliations +

Proceedings Volume 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V; 121885W (2022) https://doi.org/10.1117/12.2630327
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

We discuss the field retermination of high-fiber count MTP fiber connectors used with the APOGEE spectrograph at Apache Point Observatory (APO) in 2021. We address lessons-learned, wear-analysis of removed MTPs, and throughput of the fiber train with the newly terminated fibers in SDSS-V. For the past decade the spectrograph at APO, as part of multiple incarnations of the Sloan Digital Sky Survey (SDSS), has relied upon rapid changes of ten MTP connectors, each containing 30 terminated fibers, and all contained within a custom gang connector system. These rapid changes enable the iterative plugging of the gang connector into multiple cartridges with different plug plates to observe various survey fields throughout the night. While robotic Focal Plane Systems have been developed for SDSS-V to replace plug plates, which will minimize the fiber connector cycles, we nonetheless reterminated the most heavily used MTP connectors. The connector cycles had far exceeded manufacturer lifetimes and the overall system throughput was degrading.

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John C. Wilson, Dan Rocheleau, John Fox, Louis Green, Donald Harkins, Dirk Schoellner, Stuart Melton, Lori Seagle, Zane Fitzgerald, David Nidever, Nathan De Lee, Jon Holtzman, Emily Farr, Sarah Tuttle, Audrey Oravetz, Katie Grabowski, Kaike Pan, Dmitry Bizyaev, Jamey Eriksen, Stefanie Wachter, Solange Ramirez, and Juna Kollmeier "Field retermination of APOGEE spectrograph MTP fiber connectors", Proc. SPIE 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V, 121885W (29 August 2022); https://doi.org/10.1117/12.2630327

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KEYWORDS

Connectors

Telescopes

Polishing

Epoxies

Spectrographs

Observatories

Interferometers

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