Venting the CFHT Dome

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Winds from

the East

Flow angled

upward ~ 20 degrees

Radiatively cooled

terrain

Lee side upwelling

Upwind stagnation point

(best vent location) is low

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TECHNICAL OPERATIONS MEETING #04-10 24 May, 2004 Present ...

Winds from the East Flow angled upward ~ 20 degrees Radiatively cooled terrain Lee side upwelling Upwind stagnation point (best vent location) is low

Large fraction of flow continues in contact with dome skin Chimney flow present with or without vents Dye released here travels across cold observing floor and mixes into optical path

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: Vortex scours cold air and lifts it
Page 19 and 20: Bids solicited from 8 pre-selected
Page 21 and 22: Vertical gores - ¼ inch steel plat
Page 23: vents delivered as assembled units
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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