Normal transition and propagation Characteristics of YBCO tape

• Published in: IEEE transactions on applied superconductivity Vol. 15; no. 2; pp. 1659 - 1662
• Main Authors: Ishiyama, A., Yanai, M., Morisaki, T., Ueda, H., Shiohara, Y., Izumi, T., Iijima, Y., Saitoh, T.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.06.2005; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Computational modeling; Computer programs; COMPUTER SIMULATION; COMPUTERS; Conductors; COPPER OXIDE; Current measurement; Electric connection. Cables. Wiring; Electrical engineering. Electrical power engineering; Electronics; Exact sciences and technology; Finite element analysis; Finite element method; High temperature superconductors; Magnetic field measurement; Magnetic fields; Materials; MATHEMATICAL ANALYSIS; Mathematical models; Microelectronic fabrication (materials and surfaces technology); Minimum quench energy; normal transition and propagation; Propagation; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Stability criteria; Studies; Superconducting devices; Superconducting films; Superconducting tapes; SUPERCONDUCTIVITY; SUPERCONDUCTORS; TAPE; thickness of Ag-stabilizer; Various equipment and components; YBCO superconductors; YBCO tape; Yttrium barium copper oxide; YTTRIUM OXIDE; thickness of Ag-stabilizer; Voltage current curve; normal transition and propagation; Stability criterion; High temperature; YBCO tape; Finite element method; Microelectronic fabrication; Computer program; Physical vapor deposition; Minimum energy; Electrical conductor; Magnetic field; Inward current; High temperature superconductor; Thermal characteristic; Thermal behavior; Pulsed laser deposition; Ion beam coating; Experimental study; Coated material; Thickness; Minimum quench energy; Superconducting tapes; System simulation; Comparative study
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2005.849225

YBCO tape is expected to be used in future HTS applications, because it has better J/sub c/ characteristic in high temperatures and in high applied magnetic fields. It is important to consider the stability in superconducting applications. To establish the stability criterion for coated conductors, the characteristics of the transition to the normal state and normal-zone propagation in YBCO sample tapes were examined experimentally and numerically. The YBCO sample tapes were produced by IBAD/PLD method. Measurements were performed as a function of both heat input and operating current for operating temperatures of 55 K, 60 K, and 65 K in a background magnetic field of 5 T. The experimental results were compared with a simulation using a newly developed computer program based on the finite element method (FEM). In the computer program, the I-V characteristics of the YBCO sample tapes were taken into account. The computer program could simulate the normal transition and propagation phenomena and its validity was confirmed. The influence of the thickness of a Ag-stabilizer on the transient thermal behavior of YBCO tapes was examined experimentally and numerically and the results were presented here.