Abstract
Long length manufacturing approach of YBa2Cu3O7−x (Y-123) conductor was performed using ion-beam-assisted-deposition (IBAD) and pulsed-laser-deposition (PLD) process in Fujikura Ltd. A new set of reel-to-reel IBAD system was designed using 110cm×15cm assisting ion source. The planer distribution of in-plane texture (Δϕ) for Gd2Zr2O7 template films were studied in large deposition area of 100cm×25cm. The throughput of 5.5m/h with Δϕ of 15° was obtained for Gd2Zr2O7 films grown on 10mm wide tapes. Long Y-123/CeO2/Gd2Zr2O7/Hastelloy tapes were produced by using reel-to-reel vacuum apparatuses of IBAD and PLD. Ic of 153A, and 88A were obtained in end-to-end of a 104m long tape, and a 217m long one, respectively. Ic of 360A was obtained in a short sample with Y-123 thickness of 2.0μm. A cryo-cooled 5-turn×4-layer small solenoid coil with inner diameter of 60mm was demonstrated using a Y-123 conductor formed by IBAD/PLD method. No severe heat spot was generated even the transporting current exceeded the coil Ic value of 355A at 20K.
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