Abstract
A simple, comparatively inexpensive reflection high-energy electron diffraction (RHEED) intensity oscillation detection and recording system is described. The RHEED pattern obtained on the screen of a molecular-beam epitaxial reactor during growth of epitaxial layers is detected by a video camera, displayed on a video monitor, and simultaneously recorded on a videocassette recorder. A mechanically positioned optical fiber relative to the monitor screen is used to select a particular element of the RHEED pattern whose time dependent intensity oscillations are applied to a photodiode-operational amplifier whose output signal is digitized, analyzed, displayed, and recorded by a desktop computer.
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