An Inexpensive Energy Filter Lens for Large Diameter Electron Beams
- 1 April 1971
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 42 (4) , 485-489
- https://doi.org/10.1063/1.1685137
Abstract
The theory behind the use of a rotationally symmetric hyperbolic electrostatic field as an energy filter lens for electrons is discussed. The design of such a lens for use in eliminating inelastically scattered electrons from the output beam in a low energy electron scatteringexperiment is described. A filter lens designed, built, and tested by the authors is described. It has an entrance aperture of 1.27 cm diameter, an angular acceptance of ±2°, and a measured energy cutoff width of (0.27±0.02)%.Keywords
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