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What is the duty of the fans on stalks along the lower mirror tier, possibly to sweep turbulence off the mirror front boundary layer?

April 26, 2017Boundary duty FANS lower mirror stalks sweep Tier turbulence

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What is the duty of the fans on stalks along the lower mirror tier, possibly to sweep turbulence off the mirror front boundary layer?

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Jim: Yes. Lab tests have shown that high velocity air across the surface of the mirror will remove just about all locally induced seeing problems. Test have been done at NOAO with 100C temps on a mirror. Enough velocity in the air and all the bad seeing can be swept away.