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Proceedings Paper

Visible camera cryostat design and performance for the SuMIRe Prime Focus Spectrograph (PFS)
Author(s): Stephen A. Smee; James E. Gunn; Mirek Golebiowski; Stephen C. Hope; Fabrice Madec; Jean-Francois Gabriel; Craig Loomis; Arnaud Le fur; Kjetil Dohlen; David Le Mignant; Robert Barkhouser; Michael Carr; Murdock Hart; Naoyuki Tamura; Atsushi Shimono; Naruhisa Takato
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Paper Abstract

We describe the design and performance of the SuMIRe Prime Focus Spectrograph (PFS) visible camera cryostats. SuMIRe PFS is a massively multi-plexed ground-based spectrograph consisting of four identical spectrograph modules, each receiving roughly 600 fibers from a 2394 fiber robotic positioner at the prime focus. Each spectrograph module has three channels covering wavelength ranges 380 nm - 640 nm, 640 nm - 955 nm, and 955 nm - 1.26 um, with the dispersed light being imaged in each channel by a f/1.07 vacuum Schmidt camera. The cameras are very large, having a clear aperture of 300 mm at the entrance window, and a mass of ~280 kg. In this paper we describe the design of the visible camera cryostats and discuss various aspects of cryostat performance.

Paper Details

Date Published: 9 August 2016
PDF: 17 pages
Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99088Y (9 August 2016); doi: 10.1117/12.2233185
Show Author Affiliations
Stephen A. Smee, Johns Hopkins Univ. (United States)
James E. Gunn, Princeton Univ. (United States)
Mirek Golebiowski, Johns Hopkins Univ. (United States)
Stephen C. Hope, Johns Hopkins Univ. (United States)
Fabrice Madec, Lab. d'Astrophysique de Marseille (France)
Jean-Francois Gabriel, Winlight System S.A. (France)
Craig Loomis, Princeton Univ. (United States)
Arnaud Le fur, Lab. d'Astrophysique de Marseille (France)
Kjetil Dohlen, Lab. d'Astrophysique de Marseille (France)
David Le Mignant, Lab. d'Astrophysique de Marseille (France)
Robert Barkhouser, Johns Hopkins Univ. (United States)
Michael Carr, Princeton Univ. (United States)
Murdock Hart, Johns Hopkins Univ. (United States)
Naoyuki Tamura, Kavli Institute for the Physics and Mathematics of the Universe (Japan)
Atsushi Shimono, Kavli Institute for the Physics and Mathematics of the Universe (Japan)
Naruhisa Takato, National Astronomical Observatory of Japan (Japan)

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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