Comparison of magnetic field profiles of Ag/BSCCO-2223 tapes carrying AC and DC currents

The magnetic field profiles above Ag/BSCCO-2223 tapes of multifilamentary and multilayer configurations, whilst carrying transport currents, are compared with those predicted from their AC losses. These tapes show AC losses which follow the critical state equation for losses in a conductor of elliptical cross-section and therefore the magnetic field above the tapes during a current cycle can be predicted. We compare these predicted profiles with Hall probe measurements made when the tapes are carrying both AC and DC transport currents and with magneto-optical images.