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Proceedings Paper

Detectors and cryostat design for the SuMIRe Prime Focus Spectrograph (PFS)
Author(s): James E. Gunn; Michael Carr; Stephen A. Smee; Joe D. Orndorff; Robert H. Barkhouser; Charles L. Bennett; Jenny E. Greene; Timothy Heckman; Hiroshi Karoji; Olivier LeFevre; Hung-Hsu Ling; Laurent Martin; Brice Ménard; Hitoshi Murayama; Eric Prieto; David Spergel; Michael A. Strauss; Hajime Sugai; Akitoshi Ueda; Shiang-Yu Wang; Rosemary Wyse; Nadia Zakamska
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Paper Abstract

We describe the conceptual design of the camera cryostats, detectors, and detector readout electronics for the SuMIRe Prime Focus Spectrograph (PFS) being developed for the Subaru telescope. The SuMIRe PFS will consist of four identical spectrographs, each receiving 600 fibers from a 2400 fiber robotic positioner at the prime focus. Each spectrograph will have three channels covering wavelength ranges 3800 Å - 6700 Å, 6500 Å - 10000 Å, and 9700 Å - 13000 Å, with the dispersed light being imaged in each channel by a f/1.10 vacuum Schmidt camera. In the blue and red channels a pair of Hamamatsu 2K x 4K edge-buttable CCDs with 15 um pixels are used to form a 4K x 4K array. For the IR channel, the new Teledyne 4K x 4K, 15 um pixel, mercury-cadmium-telluride sensor with substrate removed for short-wavelength response and a 1.7 um cutoff will be used. Identical detector geometry and a nearly identical optical design allow for a common cryostat design with the only notable difference being the need for a cold radiation shield in the IR camera to mitigate thermal background. This paper describes the details of the cryostat design and cooling scheme, relevant thermal considerations and analysis, and discusses the detectors and detector readout electronics.

Paper Details

Date Published: 24 September 2012
PDF: 20 pages
Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84464O (24 September 2012); doi: 10.1117/12.926279
Show Author Affiliations
James E. Gunn, Princeton Univ. (United States)
Michael Carr, Princeton Univ. (United States)
Stephen A. Smee, The Johns Hopkins Univ. (United States)
Joe D. Orndorff, The Johns Hopkins Univ. (United States)
Robert H. Barkhouser, The Johns Hopkins Univ. (United States)
Charles L. Bennett, The Johns Hopkins Univ. (United States)
Jenny E. Greene, Princeton Univ. (United States)
Timothy Heckman, The Johns Hopkins Univ. (United States)
Hiroshi Karoji, Kavli Institute for the Physics and Mathematics of the Universe, The Univ. of Tokyo (Japan)
Olivier LeFevre, Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)
Hung-Hsu Ling, Institute of Astronomy and Astrophysics (Taiwan)
Laurent Martin, Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)
Brice Ménard, The Johns Hopkins Univ. (United States)
Kavli Institute for the Physics and Mathematics of the Universe, The Univ. of Tokyo (Japan)
Hitoshi Murayama, Kavli Institute for the Physics and Mathematics of the Universe, The Univ. of Tokyo (Japan)
Eric Prieto, Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)
David Spergel, Princeton Univ. (United States)
Michael A. Strauss, Princeton Univ. (United States)
Hajime Sugai, Kavli Institute for the Physics and Mathematics of the Universe, The Univ. of Tokyo (Japan)
Akitoshi Ueda, National Astronomical Observatory of Japan (Japan)
Shiang-Yu Wang, Institute of Astronomy and Astrophysics (Taiwan)
Rosemary Wyse, The Johns Hopkins Univ. (United States)
Nadia Zakamska, The Johns Hopkins Univ. (United States)


Published in SPIE Proceedings Vol. 8446:
Ground-based and Airborne Instrumentation for Astronomy IV
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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