Venting the CFHT Dome

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The Image Quality Improvement Program SAC / BoD – 2010 (a cost-effective means to improve CFHT's delivered image quality) Four components: 1) Dome Venting – in process 2) Thermal Imbalance Mitigation - staffing 3) Dome Painting – LoMIT - after vent installation 4) Primary and Secondary Mirror Refiguring – ROM quotes
Company Refigure Regrind / refigure Exelis (Kodak, ITT) $2400k US / 77 wks No interest L3 – Brashear (Contraves) No interest > $3500k / 72 wks LZOS (Moscow) $ 325k US / 36 wks No response Sagem (Paris) $1600k US / ? > $ 2890 US / ? Uof Arizona mirror lab Interest - No specifics Interest - No specifics
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 and 22: Vertical gores - ¼ inch steel plat
Page 23: vents delivered as assembled units
Page 39: • Initially RO can select between
Page 46: MegaCam storage electronisc - SOLVE

Venting the CFHT Dome

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