Curvature of the effective field boundary of realistic sector magnets

B. Pfreundtner; Hermann Wollnik

doi:10.1117/12.221583

25 September 1995 Curvature of the effective field boundary of realistic sector magnets

B. Pfreundtner, Hermann Wollnik

Proceedings Volume 2522, Electron-Beam Sources and Charged-Particle Optics; (1995) https://doi.org/10.1117/12.221583
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

For realistic sector magnets the effective field boundary is not parallel to the pole face boundary since in the corners the longitudinal and the radial fringing fields overlap. Thus the effective field boundary is always curved even if the pole face boundary is straight. This effect is especially large if the magnet air gap is a large fraction of the radius of curvature of the optic axis. It can be reduced, however, by field clamps and is enlarged by Rogowski pole end shapes. To determine the effective field boundary of realistic sector magnets 3D field calculations are necessary. For the present investigation such 3D fields were determined by the surface-charge method with all saturation effects being neglected.

Citation Download Citation

B. Pfreundtner and Hermann Wollnik "Curvature of the effective field boundary of realistic sector magnets", Proc. SPIE 2522, Electron-Beam Sources and Charged-Particle Optics, (25 September 1995); https://doi.org/10.1117/12.221583

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