A new compact 60 kV Mott polarimeter for spin polarized electron spectroscopy
作者:
V. N. Petrov,
M. Landolt,
M. S. Galaktionov,
B. V. Yushenkov,
期刊:
Review of Scientific Instruments
(AIP Available online 1997)
卷期:
Volume 68,
issue 12
页码: 4385-4389
ISSN:0034-6748
年代: 1997
DOI:10.1063/1.1148400
出版商: AIP
数据来源: AIP
摘要:
A compact 60 kV Mott polarimeter has been constructed, tested, and calibrated especially for the local analysis of surface and two-dimension magnetism by means of electron spectroscopy with spin resolution. The use of construction combining spherical accelerating field with the absence of retarding potential after electron scattering provides low sensitivity of the polarimeter to movements of the analyzed electron beam and changes in its diameter. Special silicon surface-barrier detectors with large electron-optical acceptance provide efficiency∈(≡Seff2×I/I0)about≈2.5×10−4.The unique fast electronics allow to work with maximum count rate of detected electrons up to5×106 counts/s.As a result, there is the possibility to calibrate the polarimeter (to calculate the effective Sherman functionSeff) by extrapolation of the measured asymmetry to the high level of discrimination. This instrument is compact, fully UHV compatible and may be used in other fields of solid state physics, atomic physics, and physics of high energies. ©1997 American Institute of Physics.
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