IMPOSITION OF PERIODIC MAGNETIZATION PATTERNS ON HIGH-ENERGY-PRODUCT MAGNETIC PLATES

Periodically magnetized permanent magnet plates with high-energy produ cts are potentially very useful in high-field structures such as free- electron lasers, electrical machinery, and various mechanical applicat ions such as magnetic bearings, for which they are already being used. A major problem is the lack of field sources with sufficient held amp litude to impose such patterns of magnetization on high-coercivity mat erials. This paper shows how such high amplitudes can be obtained for several patterns by use of modified sources of the augmented ''magic r ing'' and ''magic sphere'' types.