Fabrication and Properties of Bi2212 Rutherford Superconducting Cable

Bi2212/Ag round wire can be used as large current capacity conductor fabricated in the shape of Rutherford cable. We have fabricated 110 m long Bi2212 Rutherford cable of 20 strand and 10 m long Bi2212 Rutherford cable of 30 strand and 8 strand by using our own Rutherford cabling machine. The critical current ( I c ) of the reacted Rutherford cables have been measured at 4.2 K and 65 K, respectively. The magnetization ( M ) versus. magnetic field ( H ) and magnetic irreversibility (Delta M ) versus. magnetic field ( H ) have been measured at 5-40 K in background magnetic field up to 8 T using PPMS instrument. It is estimated from Delta M that critical current density ( J c ) of 20 strand Rutherford cable is higher than that of 30 strand Rutherford cable.