Chamber has just been flushed. CPC counts increased almost immediately after flushing was stopped.

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Presentation transcript:

Chamber has just been flushed

CPC counts increased almost immediately after flushing was stopped

A few minutes later

Repeated a fill/flush cycle and left the bottom sheet almost flat (i.e. nearly atmospheric pressure)

Number concentration is so variable but there is certainly a leak! DMPS measured about 2 ugm-3 of mass for particles of about 100nm diameter

15:23 end of fill/start of flush

15:31 End of flush/ start of fill DMPS mass is decreasing (now 0.3 ugm-3), mode below 100 nm

3 rd time!! DMPS measured 2.5 ugm-3 of ~ 250nm particles

OKKK.. One massive hole on a chamber wall.. And another big hole on another Wall…. Main lower and upper sheets to be replaced tomorrow…