Problem sem4160 SNF 2008-11-25 20:01:50: Image is very dim

rik at rik at
Tue Nov 25 20:01:51 PST 2008

Emission current is 11uA, but the image is VERY dim. Can hardly make out features, even when imaging the metal stage. Tried Vacc = 5 / 10 kV without any difference. Increasing contrast helps for metal, but makes the image very noisy. 

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