Comment metalica 2001-10-11 19:14:33: Base pressure larger than 1E-6 torr

kyang at snf.stanford.edu kyang at snf.stanford.edu
Thu Oct 11 07:14:34 PDT 2001

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I waited for three hours for cryo pump to pump down the system, I could only get 1.52E-6 torr.   The temperature of the pump is 18K, so it is normal.   I do not know why the system can not be pumped down to lower pressure.   Can someone take a look?  Thanks
Kai  
408-452-0282  X205

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