The two kinds of field-emission (point-projection) microscopes* were both invented by E. W. Müller(1) (Figure 14.1). The older device (1936) employs field-emission of electrons from the negatively charged tip of a very sharp needle in a vacuum by point-projection of the image onto a positively charged, fluorescent screen. The device is a specialized cathode-ray tube (Figure 14.2).(2) The newer device (1950) emits ions from an anode.
KeywordsHelium Atom Bright Spot Liquid Hydrogen Field Evaporation Emission Microscope
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References for Chapter 14
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