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A Transmission Electron Microscope For Lecture Demonstrations, J. A. Panitz, Gertrude Rempfer
A Transmission Electron Microscope For Lecture Demonstrations, J. A. Panitz, Gertrude Rempfer
Physics Faculty Publications and Presentations
A simple transmission electron microscope (TEM) suitable for lecture demonstrations is described. In this TEM electrons are created in a glow discharge between two parallel electrodes in air at a reduced pressure. The electrons are collimated by a small hole in theanode, focused by a solenoid that acts as an electromagnetic lens, and imaged on a thin layer of phosphor deposited inside an Erlenmeyer flask. An image of a biological sample placed between the source and the lens can be magnified about 20 times. The microscope uses inexpensive components that can be quickly assembled during a demonstration. The TEMprovides a …