Development of IBAD/PLD process for long length Y-123 conductors in Fujikura

✍ Scribed by Y. Iijima; N. Kaneko; S. Hanyu; Y. Sutoh; K. Kakimoto; S. Ajimura; T. Saitoh

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 497 KB
• Volume: 445-448
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2006.04.045

✦ Synopsis

Long length manufacturing approach of YBa 2 Cu 3 O 7Àx (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 110 cm • 15 cm assisting ion source. The planer distribution of in-plane texture (D/) for Gd 2 Zr 2 O 7 template films were studied in large deposition area of 100 cm • 25 cm. The throughput of 5.5 m/h with D/ of 15°was obtained for Gd 2 Zr 2 O 7 films grown on 10 mm wide tapes. Long Y-123/ CeO 2 /Gd 2 Zr 2 O 7 /Hastelloy tapes were produced by using reel-to-reel vacuum apparatuses of IBAD and PLD. I c of 153 A, and 88 A were obtained in end-to-end of a 104 m long tape, and a 217 m long one, respectively. I c of 360 A was obtained in a short sample with Y-123 thickness of 2.0 lm. A cryo-cooled 5-turn • 4-layer small solenoid coil with inner diameter of 60 mm 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 I c value of 355 A at 20 K.