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