The design and application of symmetrical multipole fields in cylindrical bores, produced by sector windings of constant current density

The mathematical calculations involved in the design of windings to produce symmetrical multipole fields in a cylindrical bore are given in detail. It is stated that new types of 2n-pole magnetic-field configurations have been developed for accelerators and radiation transport magnets as used in high-energy particle physics, and an illustrative example is quoted. This is the first superconducting 1 m long 5-T-quadrupole lens together with the correction magnets for the new 800 MeV booster synchrotrons located in Geneva and made for CERN. The production of symmetrical dipole, quadrupole, and sextuple magnetic fields of high accuracy is attained by the use of suitable configurations of sector windings of constant current density in a cylindrical bore. Photographs of significant components illustrate the text. (1 refs).