Design of a large-bore 60-T pulse magnet for Sandia National Laboratories

The design of a new pulsed magnet system for the generation of intense elec tron beams is presented. Determined by the required magnetic field profile along the axis, the magnet system consists of two coils (Coil #1 and #2) se parated by a 32-mm axial gap. Each coil is energized independently. Both co ils are internally reinforced with HM Zylon fiber/epoxy composite. Coil #1 made with Al-15 Glidcop wire has a bore of 110-mm diameter and is 200-mm lo ng; it is energized by a 1.3-MJ, 13-kV capacitor bank. The magnetic field a t the center of this coil is 30 T. Coil #2 made with CuNb wire has a bore d iameter of 45 mm, generates 60 T with a pulse duration of 60 ms, and is pow ered by a 4.0-MJ, 17.7-kV capacitor bank. We present design criteria, coupl ing of the magnets, and normal and fault conditions during operation.