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Proceedings Paper

The nuMOIRCS project: detector upgrade overview and early commissioning results
Author(s): Josh Walawender; Matthew Wung; Maximilian Fabricius; Ichi Tanaka; Nobuo Arimoto; David Cook; Brian Elms; Yasuhito Hashiba; Yen-Sang Hu; Ikuru Iwata; Tetsuo Nishimura; Koji Omata; Naruhisa Takato; Shiang-Yu Wang; Mark Weber
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Paper Abstract

In 2014 and 2015 the Multi-Object InfraRed Camera and Spectrograph (MOIRCS) instrument at the Subaru Telescope on Maunakea is underwent a significant modernization and upgrade project. We upgraded the two Hawaii2 detectors to Hawaii2-RG models, modernized the cryogenic temperature control system, and rewrote much of the instrument control software. The detector upgrade replaced the Hawaii2 detectors which use the Tohoku University Focal Plane Array Controller (TUFPAC) electronics with Hawaii2-RG detectors using SIDECAR ASIC (a fully integrated FPA controller system-on-a-chip) and a SAM interface card. We achieved an improvement in read noise by a factor of about 2 with this detector and electronics upgrade. The cryogenic temperature control upgrade focused on modernizing the components and making the procedures for warm up and cool down of the instrument safer. We have moved PID control loops out of the instrument control software and into Lakeshore model 336 cryogenic temperature controllers and have added interlocks on the warming systems to prevent overheating of the instrument. Much of the instrument control software has also been re-written. This was necessitated by the different interface to the detector electronics (ASIC and SAM vs. TUFPAC) and by the desire to modernize the interface to the telescope control software which has been updated to Subaru's "Gen2" system since the time of MOIRCS construction and first light. The new software is also designed to increase reliability of operation of the instrument, decrease overheads, and be easier for night time operators and support astronomers to use.

Paper Details

Date Published: 9 August 2016
PDF: 9 pages
Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99082G (9 August 2016); doi: 10.1117/12.2231812
Show Author Affiliations
Josh Walawender, Subaru Telescope, National Astronomical Observatory of Japan (United States)
W.M. Keck Observatory (United States)
Matthew Wung, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Maximilian Fabricius, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Ichi Tanaka, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Nobuo Arimoto, Subaru Telescope, National Astronomical Observatory of Japan (United States)
David Cook, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Brian Elms, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Yasuhito Hashiba, The Univ. of Tokyo (Japan)
Yen-Sang Hu, Institute of Astronomy and Astrophysics (Taiwan)
Ikuru Iwata, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Tetsuo Nishimura, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Koji Omata, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Naruhisa Takato, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Shiang-Yu Wang, Institute of Astronomy and Astrophysics (Taiwan)
Mark Weber, Subaru Telescope, National Astronomical Observatory of Japan (United States)


Published in SPIE Proceedings Vol. 9908:
Ground-based and Airborne Instrumentation for Astronomy VI
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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