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XII.—The Hexapole Magnet as a Velocity Selector and Polarizer for Neutral Spin-½ Particles*

Published online by Cambridge University Press:  14 February 2012

H. M. Brash ,
D. M. Campbell ,
P. S. Farago ,
A. G. A. Rae ,
H. Chr. Siegmann  and
J. S. Wykes
H. M. Brash
Affiliation:
Department of Natural Philosophy, University of Edinburgh.
D. M. Campbell
Affiliation:
Department of Natural Philosophy, University of Edinburgh.
P. S. Farago
Affiliation:
Department of Natural Philosophy, University of Edinburgh.
A. G. A. Rae
Affiliation:
Department of Natural Philosophy, University of Edinburgh.
J. S. Wykes
Affiliation:
Department of Natural Philosophy, University of Edinburgh.
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Synopsis

The general paraxial particle-optic properties of the hexapole field are summarized and lens formulae derived. Formulae are given for the transmission as a function of particle velocity and system geometry for geometries appropriate to the case of neutral atom beams and of slow neutron beams respectively. These formulae are used to evaluate the hexapole magnet as a velocity selector and polarizer for atomic beams and as a spin polarizer for neutron beams. Some experimental observations on potassium beams are quoted in support of the theory.

Type
Research Article
Information
Proceedings of the Royal Society of Edinburgh Section A: Mathematics , Volume 68 , Issue 2 , 1969 , pp. 158 - 184
Copyright
Copyright © Royal Society of Edinburgh 1969

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References

References to Literature

Dickson, J. M., 1964. Prog. Nucl. Techqs Instrumn, 1, 105.Google Scholar
Friedburg, H., 1951. Z. Phys., 130, 493.CrossRefGoogle Scholar