Abstract
THE performance of electron guns used in the electron microscope has been studied by Haine and Einstein1, Boersch and Born2, and others. The present indications are that pointed filaments improve this performance. The first of these filaments was prepared by Hibi3 by hand-polishing or etching a short length of tungsten wire which was welded or otherwise attached to a conventional hairpin filament according to Müller's method4. Heating was obtained by conduction from the hairpin.
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References
Haine, M. E., and Einstein, P. A., Brit. J. App. Phys., 3, 40 (1952).
Boersch, H., and Born, G., Proc. Fourth Intern. Conf. Electron Microscopy, Berlin, 1958, 35.
Hibi, T., Proc Intern. Conf. Electron Microscopy, London, 1954, 636.
Müller, E. W., Z. Phys., 106, 541 (1937).
Swift, D. W., and Nixon, W. C., Proc. Second European Regional Conf. Electron Microscopy, Delft, 1960 (in the press).
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BRADLEY, D. Simple Methods for preparing Pointed Filaments for the Electron Microscope. Nature 189, 298–300 (1961). https://doi.org/10.1038/189298c0
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DOI: https://doi.org/10.1038/189298c0
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