Problem metalica SNF 2010-03-20 01:30:13: Gate valve partly opened when roughing valve was opened

sgchong at snf.stanford.edu sgchong at snf.stanford.edu
Sat Mar 20 01:30:14 PDT 2010


We forgot to close the nitrogen valve when pumping down the chamber, and this led to the gate valve opening during pumping.  Hope this did not cause oil contamination in the chamber....




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