An increase in peak magnetic field yields a reduction in both volume (higher energy density) and cost (reduced conductor length). Smaller volume means higher energy density and cost is reduced due to the decrease of the conductor length. There is an optimum value of the peak magnetic field, about 7 T in this case. If the field is increased past the optimum, further volume reductions are possible with minimal increase in cost. The limit to which the field can be increased is usually not economic but physical and it relates to the impossibility of bringing the inner legs of the toroid any closer together and still leave room for the bucking cylinder.
an increase in peak magnetic field yields a reduction in both volume (higher energy density) and cost (reduced conductor length) smaller volume means higher energy density and cost is reduced due to the decrease of the conductor length there is an optimum value of the peak magnetic field about 7 t in this case if the field is increased past the optimum further volume reductions are possible with minimal increase in cost the limit to which the field can be increased is usually not economic but physical and it relates to the impossibility of bringing the inner legs of the toroid any closer together and still leave room for the bucking cylinder