Comment raith SNF 2009-09-22 15:13:04: extraction Voltage adjusted emision now normal

jwc at snf.stanford.edu jwc at snf.stanford.edu
Tue Sep 22 15:13:05 PDT 2009


I checked and adjusted the Extractor Voltage to the RAITH FE-GUN up 100 volts.  Now the emision is stable and near to the expected current settings.  No restrictions on usage or Acceleration Voltage at this time.
Gun Vacuum 7.39E-010 torr  with GUN off 3.2E-010 torr.
SYSTEM VACUUM 8.39E-007 torr
optimal pressure
We will continue to closely monitor the system through the evening hours.  No explanation for last night's EHT set extractor trip other than possible transient  AC or DC signals coming into the Power supplied to this system.  Nothing unusual found on inspection...
JWC




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