Experimental determination of the transmission factor for the Omicron EA125 electron analyzer

Ruffieux, P.; Schwaller, Patrick; Gröning, O.; Schlapbach, L.; Gröning, P.; Herd, Q. C.; Funnemann, D.; Westermann, J. (2000). Experimental determination of the transmission factor for the Omicron EA125 electron analyzer Review of Scientific Instruments, 71(10), p. 3634. 10.1063/1.1313798

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In this article a study of the transmission factor of the Omicron EA125 analyzer equipped with the universal lens is presented. The procedure is based on a model by Cross and Castle [J. Electron Spectrosc. Relat. Phenom. 22, 53 (1981)] and is applicable to every spectrometer which can be operated in the constant analyzer energy (CAE) and in the constant retarding ratio measuring mode. The advantage of the method is its independence on the sample and on the inelastic mean free path of the electrons. We find that the transmission factor for the CAE mode is proportional to E−1kin for most measuring setups. This dependence is predicted by theory for an ideal analyzer. Deviations from this behavior are observed if the retarding ratio for a given kinetic energy is too small. The limit value of the retarding ratio for ideal behavior, i.e., an E−1kin transmission factor, depends on the analyzer entrance slit aperture which has been selected.

Item Type:

Journal Article (Original Article)

Division/Institute:

Engineering and Information Technology > Institute for Surface Applied Laser, Phototonics and Surface Technologies ALPS
Engineering and Information Technology

Name:

Ruffieux, P.;
Schwaller, Patrick;
Gröning, O.;
Schlapbach, L.;
Gröning, P.;
Herd, Q. C.;
Funnemann, D. and
Westermann, J.

ISSN:

0034-6748

Language:

English

Submitter:

Patrick Schwaller

Date Deposited:

10 Dec 2019 07:49

Last Modified:

10 Dec 2019 07:49

Publisher DOI:

10.1063/1.1313798

URI:

https://arbor.bfh.ch/id/eprint/9295

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