In order to minimize the diffusion of more dust particles into the vented IFO vacuum envelope
BEFORE opening chamber:
-Have a known plan,
-Heavy 1" thick door requires 3 persons- of one experienced and one certified crane operator and steel tow safety shoes
-Block IFO beams, be ware of experimental set up of other hazards: 1064, visible or new-special installation
- Look at the particle counter, do not open above 6,000 particles of 0.5 micron. Construction activities are winding down. See plot of 35 days since we vented.
-Have clean door stand for heavy door, covered with merostate at the right location and dry-clean screws for light covers,
-Prepare lint free wipers for o-rings,(no solvent on o-ring!) Kimwipes for outside of chamber and metal covers, methanol and powder free gloves
-Wipe with wet Kimwipe-tissue of methanol around the door, chamber of interest and o-ring cover ring
-Cut door covering merostate and tape it into position,..if in place...check folded-merostate position, if dusty... replace it
-Is your cleanroom garment clean?.......if in doubt ....replace it
-Keep surrounding area free and clean
-Make sure that HEPAs are running: PSL-enclosure, two mobile units and south end flow banch
-Check the tools: are they really clean? wipe it with wet Kimwipe, do you see anything on the Kimwipe?
-You are responsible to close chamber ASAP with light door or doors as you finished for the day.
Merostate cover down is appropriate during daily brakes.