Probing the temperature during switching of YBCO films

A. Lehner; A. Heinrich; K. Numssen; H. Kinder

doi:10.1016/S0921-4534(02)01090-0

Probing the temperature during switching of YBCO films

A. Lehner, A. Heinrich, K. Numssen, H. Kinder

Department of Physics

Technical University of Munich

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

13 Scopus citations

Abstract

The switching of YBCO thin films under high current load is fundamental for fault current limiters and active power switches. Its mechanism is still under debate, however, with thermal and nonthermal models being discussed. To clarify the situation, we have placed an array of thermometers directly on top of a YBCO strip and have measured the quench propagation with high spacio-temporal resolution. We compare the results with a numerical model of heat diffusion in 3D with temperature dependent material parameters and find nearly quantitative agreement. This confirms thermal runaway as the mechanism of switching.

Original language	English
Pages (from-to)	1619-1621
Number of pages	3
Journal	Physica C: Superconductivity and its Applications
Volume	372-376
DOIs	https://doi.org/10.1016/S0921-4534(02)01090-0
State	Published - Aug 2002

Keywords

Fault current limiters
Switching mechanism
YBCO thin films

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10.1016/S0921-4534(02)01090-0

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title = "Probing the temperature during switching of YBCO films",

abstract = "The switching of YBCO thin films under high current load is fundamental for fault current limiters and active power switches. Its mechanism is still under debate, however, with thermal and nonthermal models being discussed. To clarify the situation, we have placed an array of thermometers directly on top of a YBCO strip and have measured the quench propagation with high spacio-temporal resolution. We compare the results with a numerical model of heat diffusion in 3D with temperature dependent material parameters and find nearly quantitative agreement. This confirms thermal runaway as the mechanism of switching.",

keywords = "Fault current limiters, Switching mechanism, YBCO thin films",

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AU - Lehner, A.

AU - Heinrich, A.

AU - Numssen, K.

AU - Kinder, H.

PY - 2002/8

Y1 - 2002/8

N2 - The switching of YBCO thin films under high current load is fundamental for fault current limiters and active power switches. Its mechanism is still under debate, however, with thermal and nonthermal models being discussed. To clarify the situation, we have placed an array of thermometers directly on top of a YBCO strip and have measured the quench propagation with high spacio-temporal resolution. We compare the results with a numerical model of heat diffusion in 3D with temperature dependent material parameters and find nearly quantitative agreement. This confirms thermal runaway as the mechanism of switching.

AB - The switching of YBCO thin films under high current load is fundamental for fault current limiters and active power switches. Its mechanism is still under debate, however, with thermal and nonthermal models being discussed. To clarify the situation, we have placed an array of thermometers directly on top of a YBCO strip and have measured the quench propagation with high spacio-temporal resolution. We compare the results with a numerical model of heat diffusion in 3D with temperature dependent material parameters and find nearly quantitative agreement. This confirms thermal runaway as the mechanism of switching.

KW - Fault current limiters

KW - Switching mechanism

KW - YBCO thin films

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U2 - 10.1016/S0921-4534(02)01090-0

DO - 10.1016/S0921-4534(02)01090-0

M3 - Article

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SN - 0921-4534

VL - 372-376

SP - 1619

EP - 1621

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

ER -

Probing the temperature during switching of YBCO films

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Keywords

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