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