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The performance of high-field magnets with optimized internal reinforcement

For the performance analysis of pulsed high-field magnets with internal reinforcement, analytical equations are derived for the optimum distribution of the reinforcement in long coils without external reinforcement. Among others, the relation between the stress in the reinforcement, the obtainable magnetic field and the filling factor of the conductor are established. By adjusting the amount of reinforcement for each layer of conductor, optimal use is made of the material strength. Therefore, this type of magnet is a good candidate for obtaining high magnetic fields up to 100 T. Moreover, it is shown that these magnets give the longest pulse duration when used in combination with an energy-limited high-power pulsed energy source.