Heat propagation and stability in a small high Tc superconductor coil

Takanobu Kiss; V. S. Vysotsky; H. Yuge; H. Saho; Yu A. Ilyin; M. Takeo; K. Watanabe; F. Irie

doi:10.1016/S0921-4534(98)00494-8

Heat propagation and stability in a small high T_c superconductor coil

Takanobu Kiss, V. S. Vysotsky, H. Yuge, H. Saho, Yu A. Ilyin, M. Takeo, K. Watanabe, F. Irie

Section of Measurement and Control Engineering

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

Using a Bi-based small high T_c superconductor (HTSC) coil, we have studied its stability against a local disturbance and current-induced quench in the helium gas cooling condition. While the stability margin of HTSC coil against a local disturbance was very large, quench current was limited by a catastrophic temperature rise which originated from the nonlinear characteristic of the Joule heating. The crucial parameter for the quench becomes the nonlinear resistance in HTSC as a function of temperature and transport current. It has been shown that the dynamic characteristics of the quench can be described quantitatively by the simplified one-dimensional heat balance equation.

Original language	English
Pages (from-to)	372-376
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	310
Issue number	1-4
DOIs	https://doi.org/10.1016/S0921-4534(98)00494-8
Publication status	Published - Jan 1 1998

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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AU - Kiss, Takanobu

AU - Vysotsky, V. S.

AU - Yuge, H.

AU - Saho, H.

AU - Ilyin, Yu A.

AU - Takeo, M.

AU - Watanabe, K.

AU - Irie, F.

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AB - Using a Bi-based small high Tc superconductor (HTSC) coil, we have studied its stability against a local disturbance and current-induced quench in the helium gas cooling condition. While the stability margin of HTSC coil against a local disturbance was very large, quench current was limited by a catastrophic temperature rise which originated from the nonlinear characteristic of the Joule heating. The crucial parameter for the quench becomes the nonlinear resistance in HTSC as a function of temperature and transport current. It has been shown that the dynamic characteristics of the quench can be described quantitatively by the simplified one-dimensional heat balance equation.

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