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

被引：34

作者：

Ruffieux, P ^{[1
]}

Schwaller, P

Gröning, O

Schlapbach, L

Gröning, P

Herd, QC

Funnemann, D

Westermann, J

机构：

[1] Univ Fribourg, Inst Phys, CH-1700 Fribourg, Switzerland

[2] Omicron Elect Spect Ltd, Manchester M17 1NF, Lancs, England

[3] Omicron Vakuumphys GmbH, D-65232 Taunusstein, Germany

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2000年 / 71卷 / 10期

关键词：

D O I：

10.1063/1.1313798

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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-kin(-1) 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-kin(-1) transmission factor, depends on the analyzer entrance slit aperture which has been selected. (C) 2000 American Institute of Physics. [S0034-6748(00)01811-6].

引用

页码：3634 / 3639

页数：6

共 7 条

[1]

BALLARD RE, 1975, J ELECT SPECTROSC RE, V25, P75

[2] THE RELATIONSHIP BETWEEN TRANSMISSION EFFICIENCIES IN THE FRR AND FAT MODES OF AN ELECTRON SPECTROMETER [J].