Problem raith SNF 2005-05-20 16:36:23: Beam Unstable above 20 kV acceleration voltage

jwc at jwc at
Wed May 25 13:22:24 PDT 2005

clear --  EXT I has stabilized and vacuum improved over the weekend to normal levels (1.0E-009 mbar)
The FE-GUN settings are operating the GUN cooler than to specs and I will be slowly increasing EXT I through the next two days. Specifically I will make minor adjustments to the FE_GUN settings strving to reach past EXT I target values for this particular tip.
JWC 05252005:13:28

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