wherein {HEAD ~ said magnetic circuit} comprises a magnetic field induction circuit formed as a thin film of the same superconducting material that is contained within {TAIL ~ said gap} 
wherein { HEAD ~ said magnetic circuit } comprises a magnetic field induction circuit formed as a thin film of the same superconducting material that is contained within { TAIL ~ said gap }
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL