Roads to 100 T pulsed magnets

The primary reasons for failure of pulsed magnets are excess heating and st resses due to the Lorentz forces. Thus, uniform heating and constant stress through all layers will improve the performance of a magnet. Here, a compu ter code is introduced to optimize the magnetic field of a pulsed magnet ba sed on the type and dimensions of the conductor layers, and thickness of th e-reinforcement layers. Dimensions of each conductor layer are computed to achieve uniform final maximum temperature for all layers. Internal reinforc ement thickness along with the type of each conductor are calculated based on the maximum stress in the reinforcement and the maximum elongation in th e conductor. The program uses the finite difference Newton's method to find the optimum solution. This program was applied for the design of a 10 laye r pulsed magnet with an II mm bore diameter. Copper-stainless steel wires w ere used for the conductors.(with different percentage of steel resulting f rom the optimization) and a multiphase high strength alloy was utilized for the internal layer reinforcement. The results show that a 100 T field can be attained (with a bank energy of 1.9 MJ) by permitting a maximum final te mperature of 400 K and maximum von Mises stress of 2.60 GPa.