Converting a liquid nitrogen-cooled camera to closed-cycle cooling
Journal
Proceedings of SPIE - The International Society for Optical Engineering
Journal Volume
7735
Journal Issue
PART 1
ISBN
9780819482259
Date Issued
2010
Author(s)
Benedict T.
Ward J.
Barrick G.
Abstract
The detector for the ESPaDOnS spectrograph at the Canada-France-Hawaii Telescope (CFHT) is a CCD42-90 4.5kx2k CCD from e2v Industries in a liquid nitrogen cooled GL Scientific cryostat. This paper describes the conversion of this camera to closed-cycle cooling using a Polycold? cryogenic refrigeration system. Topics covered include vibration analysis, positional stability of the image plane, cool-down characteristics, PLC integration, and annual operational overheads for both systems. ? 2010 Copyright SPIE - The International Society for Optical Engineering.
Subjects
CFHT
closed-cycle cooling
cryostat
ESPaDOns
liquid nitrogen
Polycold
spectrograph
SDGs
Type
conference paper