Gun energy filter for a low energy electron microscope.
Ultramicroscopy
; 253: 113798, 2023 Nov.
Article
em En
| MEDLINE
| ID: mdl-37354876
ABSTRACT
In a Low Energy Electron Microscope (LEEM) the sample is illuminated with an electron beam with typical electron landing energies from 0-100 eV. The energy spread of the electron beam is determined by the characteristics of the electron source. For the two most commonly used electron sources, LaB6 and cold field emission W, typical energy spreads ΔE are 0.75 and 0.25 eV at full width half maximum, respectively. Here we present a design for a LEEM gun energy filter, that reduces ΔE to â¼100 meV. Such a filter has been incorporated in the IBM/SPECS AC-LEEM system at IBM. Experimental results are presented and found to be in excellent agreement with expectations.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Ultramicroscopy
Ano de publicação:
2023
Tipo de documento:
Article