Energy Resolution of the Photoemission Analyzer
作者:
T. H. DiStefano,
D. T. Pierce,
期刊:
Review of Scientific Instruments
(AIP Available online 1970)
卷期:
Volume 41,
issue 2
页码: 180-188
ISSN:0034-6748
年代: 1970
DOI:10.1063/1.1684464
出版商: AIP
数据来源: AIP
摘要:
Resolution in the photoemission energy analyzer is investigated theoretically for the case of a finite emitter in a spherically symmetric retarding field with a magnetic field present. Resolution errors shift and broaden structure in measured energy distribution curves by an amount which is energy dependent. The analysis is applicable to the spherical capacitor analyzer, the screened emitted geometry, the multiscreened LEED system, and others. Electrolytic tank measurements show field distortions caused by a flat emitter, the emitter support, and the window aperture. Spherical symmetry is restored to a configuration with a large emitter or support structure by surrounding the emitter with a screened, field‐free region. An explanation is given for the reasonable resolution obtained for any small emitter completely enclosed by a collector. Distortion of measured electron energy distributions caused by reverse photoemission, reflected electrons, and fringing fields at the emitter is also discussed.
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