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19 April 2024

» arxiv » 1608.1196

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Visible camera cryostat design and performance for the SuMIRe Prime Focus Spectrograph (PFS)
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 ;
Date:	3 Aug 2016
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 $sim$280~kg. In this paper we describe the design of the visible camera cryostats and discuss various aspects of cryostat performance.
Source:	arXiv, 1608.1196
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