An improved design method for conventional straight dipole magnets

TL;DR

This paper presents an improved design method for straight dipole magnets that enhances integrated field quality accuracy and reduces magnet size and weight by considering asymmetric good field regions and precise field integration.

Contribution

The paper introduces a novel design approach that accounts for asymmetry and field integration paths, improving field quality and reducing magnet dimensions compared to traditional methods.

Findings

Integrated field quality is more accurate with the new method.

Pole width, magnet size, and weight are reduced.

Differences in field integration paths significantly affect field quality.

Abstract

The standard design method for conventional straight dipole magnets is improved in this paper. The good field region is not symmetric with respect to the magnet mechanical center, and its width is not enlarged to include the beam sagitta. The integrated field quality is obtained by integrating the field along nominal beam paths. 2D and 3D design procedures of the improved design method are introduced, and two application examples of straight dipole magnets are presented. It is shown that the differences in integrated field quality between different field integration paths cannot be neglected. Compared with the traditional design method of straight dipole magnets, the advantage of the improved method is that the integrated field quality is accurate; the pole width, magnet dimension and weight of a straight dipole magnet can be reduced.