Shutdown raith SNF 2008-01-14 12:07:19: mechanical pumping and sensing issues

jwc at jwc at
Mon Jan 14 12:07:19 PST 2008

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?!!

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