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Proceedings Paper

Hyper Suprime-Cam: camera dewar
Author(s): Yutaka Komiyama; Satoshi Miyazaki; Satoshi Kawanomoto; Tomoki Morokuma; Hidehiko Nakaya; Hisanori Furusawa; Yoko Tanaka
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Paper Abstract

We summarize the design of the camera dewar for Hyper Suprime-Cam (HSC) which is the next generation prime focus camera for the Subaru Telescope. The camera dewar consists of six main components; base flange, focal plane assembly, window assembly, wall assembly, front-end electronics asembly and back assembly. It is about 700 mm in diameter and 500 mm in height, accommodating 116 2k×4k full depletion type CCDs inside. The CCD packages, whose heights are accurately controlled (P-V ~ 25μm), are installed on a silicon-carbide cold plate of 10 μm flatness to ensure that the surface of CCDs is flat within the focal depth of the wide-field corrector (~ 34μm). The cold plate is supported rigidly and thermally isolated by support posts which are made of Zirconia. We carried out the deformation analysis and the thermal analysis of the dewar based on the finite-element analysis, and demonstrate that the design is feasible. We also show the assembly sequence of the dewar.

Paper Details

Date Published: 11 July 2008
PDF: 11 pages
Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70144V (11 July 2008); doi: 10.1117/12.788322
Show Author Affiliations
Yutaka Komiyama, National Astronomical Observatory of Japan (Japan)
Satoshi Miyazaki, National Astronomical Observatory of Japan (Japan)
Satoshi Kawanomoto, National Astronomical Observatory of Japan (Japan)
Tomoki Morokuma, National Astronomical Observatory of Japan (Japan)
Hidehiko Nakaya, Subaru Telescope (United States)
Hisanori Furusawa, Subaru Telescope (United States)
Yoko Tanaka, Subaru Telescope (United States)

Published in SPIE Proceedings Vol. 7014:
Ground-based and Airborne Instrumentation for Astronomy II
Ian S. McLean; Mark M. Casali, Editor(s)

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