fieldion microscope

field-ion microscope

[feeld-ahy-uhn, -ahy-on]
a device in which the atomic structure of the surface of a conductor is made visible by introducing helium gas into the device and applying a high voltage to ionize and accelerate the gas toward a fluorescent screen.
Also called ion microscope.

1950–55 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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