Low‐energy electron diffraction system using a position‐sensitive detector

A low‐energy electron diffraction (LEED) system using a position‐sensitive detector is described. The design requirements for LEED observations are outlined. Most of these requirements are realized in a system incorporating a miniature, movable electron gun and a position‐sensitive detector of the r...

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Bibliographic Details
Published in:Review of scientific instruments 1985-11, Vol.56 (11), p.2077-2083
Main Authors: McRae, E. G., Malic, R. A., Kapilow, D. A.
Format: Article
Language:English
Subjects:
Exact sciences and technology
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Optical instruments, equipment and techniques
Physics
Visible and ultraviolet spectrometers
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Description
Summary:A low‐energy electron diffraction (LEED) system using a position‐sensitive detector is described. The design requirements for LEED observations are outlined. Most of these requirements are realized in a system incorporating a miniature, movable electron gun and a position‐sensitive detector of the resistive anode type, interfaced to a computer. This system has been used to make 128×128 channel digital records of LED patterns. The speed of data acquisition is limited by the detector hardware and is 20 kHz. Records of good quality (0.1° instrumental angular resolving power) can be made by counting 5×105 electrons. Illustrative applications to silicon and tungsten crystal surfaces and prospects for improving the system are described.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1138423