Multipole magnetic field trapping by superconductors

Multipole magnetic fields up to 17,600 Oe were trapped transversely to the axes of solid, hollow, and split hollow superconducting cylinders. Dipole, quadrupole, and sextupole magnetic fields were permanently stored with high fidelity to the original fields using Pb, Nb, and Nb3Sn. The advantages of this technique are mahifold: 1. Only one pattern magnet has to be made, whose field, regardless of configuration, may then be inexpensively replicated ad infinitum. 2. There is a saving of space, weight, and material. 3. There is a saving of electrical power, as the only power loss is due to heat conduction. 4. The stored magnetic field can remain extremely stable over long periods of time. 5. The magnetic field can persist for long durations even during power curtailments or shutdowns. This paper will explore the advantages and limitations of this technique, experimental results, geometry effects, and possible applications.