Design of Efficient Flux Concentrators for Pulsed High Magnetic Fields

The design of flux concentrators to produce pulsed high magnetic fields is discussed with special attention to the problem of energy transfer efficiency. A flux concentrator is described which produces a peak field of 300 kG in a cylindrical volume 2.0 cm in diameter and 3.5 cm in length. Energy storage is by means of a 440 μF capacitor bank and the pulse length is 120 μsec.