08-31-2007, 03:29 AM
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#23
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amnesic-confabulatory opsimath
Join Date: Oct 2006
Location: Between my ears
Posts: 739
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Quote:
Originally Posted by Beest
... Modern (for at least the last ten years) electron microscopes can image non conducting objects by using a low gas pressure in the chamber, incoming beam ionizes the gas around the beam providing a conducting path to dispel charge.
Low beam currents, and accelerating voltages, also help reduce sample charging in the Field emission type SEMs.
I bet you're sorry you asked now  |
Not at all - thanks B. 
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