High‐performance GaAs polarized electron source for use in inverse photoemission spectroscopy
作者:
U. Kolac,
M. Donath,
K. Ertl,
H. Liebl,
V. Dose,
期刊:
Review of Scientific Instruments
(AIP Available online 1988)
卷期:
Volume 59,
issue 9
页码: 1933-1940
ISSN:0034-6748
年代: 1988
DOI:10.1063/1.1140054
出版商: AIP
数据来源: AIP
摘要:
The design and operating properties of a GaAs polarized electron source are presented. An electron optical system is described that passes more than 80% of the emitted electrons at 10 &mgr;A to the target under low‐energy (7–20 eV) parallel beam conditions. Laser excitation can give rise to abnormal energy distributions of the photoemitted electron beam. The existence of longitudinal modes gives a possible explanation for this behavior, which can be avoided using a mode stabilized light source. The overall performance of the polarized electron source is demonstrated by inverse photoemission spectra from Ni(110).
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