Venting the CFHT Dome

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• 12 vent units – 6 per side – cost constrained - 15 degree intervals • mounted from the outside • no observing down time - work from 7:00 to 16:30
vents delivered as assembled units units extend from outer dome shell to inner insulation shell sealed from inter-skin cavity Outer rollup ‘garage’ door - weather doors - flow throttling – 4 positions - fully open - 2/3 open - 1/3 open - fully closed - inner vanes - flow redirection - flow throttling - weather backup - easily removable
Page 1 and 2: Steve Bauman CFHT Users’ Meeting
Page 3 and 4: Optical turbulence (facility seeing
Page 5 and 6: • Understand air flow in and arou
Page 7 and 8: • terraced terrain model • flow
Page 9 and 10: Vortex scours cold air and lifts it
Page 11: Large fraction of flow continues in
Page 19 and 20: Bids solicited from 8 pre-selected
Page 21: Vertical gores - ¼ inch steel plat
Page 39: • Initially RO can select between
Page 44 and 45: The Image Quality Improvement Progr
Page 46: MegaCam storage electronisc - SOLVE

Venting the CFHT Dome

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