NDLI: Hot Spot Stimulated Transition in YBCO Coated Conductors: Experiments and Simulations

Content Provider	IEEE Xplore Digital Library
Author	Celentano, G. Polli, G.M. Angrisani Armenio, A. Augieri, A. Galluzzi, V. Mancini, A. Rufoloni, A. Vannozzi, A. Gambardella, U. Saggese, A. Pace, S.
Copyright Year	2002
Abstract	Extensive applications of YBCO tapes claim for a comprehensive knowledge of their behavior in every possible operating condition. In particular, one of the main topics to explore is the tape stability against heat and current disturbances, in terms of minimum quench energy and normal zone propagation velocity (NZPV). In this work we present the results of NZPV measured in a 35 cm long YBCO coated conductors manufactured by SuperPower Inc. The tape is cooled by means of a cryocooler and kept under vacuum in order to achieve near-adiabatic conditions. Two independent heaters are positioned on the tape: one on the YBCO side and the other on the substrate side. The quench is monitored by recording the voltage and the temperature evolution along the tape. The NZPV, at 77 K, reaches a value larger than 2.5 cm/s for a bias current I=50 A which represents the 56% of the critical current value. The quench dynamics of the tape are discussed with the help of a simulation program based on the finite difference discretization of the tape with the Fourier's heat equation: the model is able to reproduce the experimental behavior.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2486
Ending Page	2489
Page Count	4
File Size	330885
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Yttrium barium copper oxide Conductors Manufacturing Protection Stability Temperature Conducting materials Substrates Voltage Critical current YBCO coated conductors Quench propagation stability
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Stability Measurements on YBCO Coated Conductors

Parameter Determination of a Condition for Simultaneous Quench in Series-Connected YBCO Coated Conductors

Analysis of Temperature Dependent Quench Characteristics of the YBCO Coated Conductor

Current Transport and Limitation Characteristics of YBCO Coated Conductor Having Different Stabilizer Connected in Series

Investigation of YBCO Coated Conductor for Application in Resistive Superconducting Fault Current Limiters

Copper stabilization of YBCO coated conductor for quench protection

Repetitive Over-Current Characteristics of the Joints Between the YBCO Coated Conductor

Longitudinal and Transverse Quench Propagation in Pancake Coils Using Coated Conductors With Additional Copper Tape in Liquid Helium

Development of Quench Propagation Models for Coated Conductors

Hot Spot Stimulated Transition in YBCO Coated Conductors: Experiments and Simulations

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Current Transport and Limitation Characteristics of YBCO Coated Conductor Having Different Stabilizer Connected in Series

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