Development of non-ferrous superconducting magnets

The authors investigate nonferrous two-dimensional arrays of line currents, creating magnetic fields suitable for guiding or focusing particle beams. Complex potential theory is used throughout. Methods have been found which reduce stray fields which are lower than those of the ferromagnetic equivalents. Harmonic analysis shows that the quality of the useful field is on a par with the state of the art. In addition to Cartesian coordinates, the potential theory is extended to elliptic coordinates. This provides greater freedom in shaping the aspect ratio of the useful field. Treated in detail is the proposed inflector for the muon g-2 experiment at BNL. A combined function magnet is developed, scaled to the CERN alternating gradient proton synchrotron. The principle of a dual beam facility is advanced.<>