Superconducting dc/ac magnetic system for loss and magnetization experiments operating up to 50/60 Hz

The use of two coaxial ac coils is proposed as a means of solving the problem of ac-dc coil coupling in apparatus used to carry out loss and magnetization measurements. The approach has been implemented in a dc-ac superconducting magnet system for operation at 50 Hz and 60 Hz. The instrument generates an ac field ranging from 0.4 T to 1.1 T which is superimposed on a dc magnetic field of up to four tesla.