How to minimize particles entering the vacuum envelope.
Just the way it was in August 2011 vent and before.
The portable HEPAs were set up at ETMY and ITMY with CP STAT 100 curtains.
The 40m particles on the floor at ITMY 3000-5000 counts of 0.5 micron cf / min and 0.3 micron size particles are 55,000 - 65,000 counts cf / min
At this condition the MET One Counter #3 on the floor inside the tent goes to zero count of 0.5 micron and 20-40 counts cf / min for 0.3 micron when the tent is slightly overpressured.
|