Problem sem4160 SNF 2011-01-21 12:08:58: Not able to flash tip

eperalta at snf.stanford.edu eperalta at snf.stanford.edu
Fri Jan 21 12:08:59 PST 2011


Vext stays at 6.5 kV. I flash and turn on again but the Vext stays unchanged. Also, emission current displays 0 uA even when its clear there's a beam since there's an image.




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