Subject: Shutdown raith SNF 2008-01-14 12:07:19: mechanical pumping and sensing issues
From: jwc@snf.stanford.edu
Date: Mon, 14 Jan 2008 12:07:19 -0800

Users last evening reported issues during session.  Loss of vacuum to chamber and isolation
of FE-Gun section.  
Several attempts to restart vacuum system encountered thermal overload of mechanical
vacuum pump and/or  time outs of vacuum target setpoints while waiting for turbo pump
to come to speed.  Suspect worn out mechanical pump motor or thermal switch or less
likely possible failed penning gage.  Three resets have encountered same problem.  Allowing
pump to cool for an hour.  Replacement mechanical pump requested from RAITH USA Inc
asking for shipment on today's FED-X for overnight.  Will they make the truck?!!
James