Hi everyone,

We have a nuclearised Tecnai F20, meaning the sample holder is within a glovebox..

Problem is, the beam is continously jumping, with a frequency around 10-20 Hz, measured by eye.

This happens at all mags, with all possible lens settings, micro/nanoprobe etc

We excluded it could be an electromagnetic field in the vicinity or a mechanical vibration, so the only explanation I can see is a charging/discharging effect, but the problem is to know where...

Can anyone provide any insight? I'd be most grateful..

Thx

Alessandro

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