Comment metalica:

wingoh at snf.stanford.edu wingoh at snf.stanford.edu
Fri Jan 11 13:08:40 PST 2013


Roughing pump can pump the chamber down to about 800 micron.   If we close the roughing valve and let the system leaks up. There is no indication of leak by the Baratron reading. This indicates that the roughing pump may have some problem and needs to be checked.




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