Modification of a transmission electron microscope to give energy-filtered images and diffraction patterns, and electron energy loss spectra
- 1 December 1975
- journal article
- Published by IOP Publishing in Journal of Physics E: Scientific Instruments
- Vol. 8 (12) , 1033-1037
- https://doi.org/10.1088/0022-3735/8/12/017
Abstract
A magnetic spectrometer of the Castaing-Henry type has been incorporated between the objective and intermediate lenses of a conventional 100 keV transmission electron microscope (AEI EM6). The electron optics of the spectrometer were adjusted to give semistigmatic focusing, allowing an overall energy resolution of 2 eV in spectra and energy selected images. Making use of the hysteresis properties of the magnetic circuit, energy-selected diffraction patterns are also obtained, with an energy window of about 8 eV. An electron counting system was incorporated to allow accurate recording of energy loss spectra. A simple Zener diode circuit is described, which provides calibration of the energy loss to within +or-0.2% for losses up to 690 eV.Keywords
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