Comment sem4160 SNF 2009-06-12 12:11:40: brightness level seems low

xinranw at xinranw at
Fri Jun 12 12:11:40 PDT 2009

JWC here...
Brightness of the 4160 seems to be low today.
Emission I and Extractor current normal, but brightness is muchd reduced from yesterday.
Open movable aperture to no 2 and recentered the beam monitor apeterture plate to no 3.

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