Chamber Background Friday 14 March 2008. Still 5000 p/cc just before the final fill is supposed to start! Bag is NOT clean enough, will do a couple more.

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Chamber Background Friday 14 March 2008

Still 5000 p/cc just before the final fill is supposed to start! Bag is NOT clean enough, will do a couple more fill/flush cycles..

About 35 min after lights on

About 3.5 hours after lights on The pre-existing 50 p/cc inhibited the nucleation, number is only 140 p/cc. Mass is More or less the same as previous backgrounds..

Last measurements before lights off (14:59) DMPS mass 0.07ugm-3, cpc 140 p/cc, 111 nm

Post experiment complete O ppb