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Elements of a Transmission Electron Microscope

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Transmission Electron Microscopy

Part of the book series: Springer Series in Optical Sciences ((SSOS,volume 36))

Abstract

Not only does the gun of an electron microscope emit electrons into the vacuum and accelerate them between cathode and anode, but it is also required to produce an electron beam of high brightness and high temporal and spatial coherence. The conventional thermionic emission from a tungsten wire is limited in temporal coherence by an energy spread of the emitted electrons of the order of a few electronvolts and in spatial coherence by the gun brightness. Lanthanum hexaboride and field-emission cathodes are alternatives, for which the energy spread is less and the gun brightness higher.

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  1. Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str. 10, D-48149, Münster, Germany

    Professor Dr. Ludwig Reimer

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Reimer, L. (1993). Elements of a Transmission Electron Microscope. In: Transmission Electron Microscopy. Springer Series in Optical Sciences, vol 36. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-21556-2_4

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  • DOI: https://doi.org/10.1007/978-3-662-21556-2_4

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