The expressions for the second‐order velocity aberration and the second‐order angle‐velocity aberration are given for a sector shaped electromagnetic analyzer with superimposed electric and magnetic fields. Focusing is in one plane.
REFERENCES
1.
E. G.
Johnson
and A. O.
Nier
, Phys. Rev.
91
, 10
(1953
), hereafter referred to as JN.2.
Equation (1aJN) is Eq. (1a) of reference 1.
3.
A. O. C. Nier has indicated in a private communication that the pure magnetic and pure electric cases have been worked out separately, and the results agree with those of this paper.
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© 1955 American Institute of Physics.
1955
American Institute of Physics
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