Steady and unsteady current modes and thermal runaway conditions of high-TC composite superconductors

V. R. Romanovskii; K. Watanabe; S. Awaji; G. Nishijima

doi:10.1109/TASC.2007.898320

Steady and unsteady current modes and thermal runaway conditions of high-T_C composite superconductors

V. R. Romanovskii, K. Watanabe, S. Awaji, G. Nishijima

IMR - High Field Laboratory for Superconducting Materials

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

1 Citation (Scopus)

Abstract

Transport current properties of the steady and unsteady operating modes and thermal runaway conditions of the Ag-sheathed Bi₂Sr ₂CaCu₂O₈ composite superconductors are theoretically studied in DC magnetic fields. It is shown that the temperature of a composite is not equal to the coolant temperature before thermal runaway. As a result, the shape of the voltage-current characteristics of high-T_c superconducting composites has only a positive slope during continuous current charging both before and after thermal runaway. That is why the voltage-current characteristics of high-T_c superconductors do not define the boundary of the thermal runaway. This peculiarity has to be considered during experiments at which the critical or quench currents are defined.

Original language	English
Pages (from-to)	3133-3136
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	17
Issue number	2
DOIs	https://doi.org/10.1109/TASC.2007.898320
Publication status	Published - 2007 Jun

Keywords

Applied current
Composite superconductor
High temperature superconductors
Overheating
Thermal runaway

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10.1109/TASC.2007.898320

Cite this

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title = "Steady and unsteady current modes and thermal runaway conditions of high-TC composite superconductors",

abstract = "Transport current properties of the steady and unsteady operating modes and thermal runaway conditions of the Ag-sheathed Bi2Sr 2CaCu2O8 composite superconductors are theoretically studied in DC magnetic fields. It is shown that the temperature of a composite is not equal to the coolant temperature before thermal runaway. As a result, the shape of the voltage-current characteristics of high-Tc superconducting composites has only a positive slope during continuous current charging both before and after thermal runaway. That is why the voltage-current characteristics of high-Tc superconductors do not define the boundary of the thermal runaway. This peculiarity has to be considered during experiments at which the critical or quench currents are defined.",

keywords = "Applied current, Composite superconductor, High temperature superconductors, Overheating, Thermal runaway",

author = "Romanovskii, {V. R.} and K. Watanabe and S. Awaji and G. Nishijima",

note = "Funding Information: Manuscript received August 28, 2006. This work was supported by the Grant-in-Aid from the Ministry of Education, Science and Technology, Japan.",

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T1 - Steady and unsteady current modes and thermal runaway conditions of high-TC composite superconductors

AU - Romanovskii, V. R.

AU - Watanabe, K.

AU - Awaji, S.

AU - Nishijima, G.

N1 - Funding Information: Manuscript received August 28, 2006. This work was supported by the Grant-in-Aid from the Ministry of Education, Science and Technology, Japan.

PY - 2007/6

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N2 - Transport current properties of the steady and unsteady operating modes and thermal runaway conditions of the Ag-sheathed Bi2Sr 2CaCu2O8 composite superconductors are theoretically studied in DC magnetic fields. It is shown that the temperature of a composite is not equal to the coolant temperature before thermal runaway. As a result, the shape of the voltage-current characteristics of high-Tc superconducting composites has only a positive slope during continuous current charging both before and after thermal runaway. That is why the voltage-current characteristics of high-Tc superconductors do not define the boundary of the thermal runaway. This peculiarity has to be considered during experiments at which the critical or quench currents are defined.

AB - Transport current properties of the steady and unsteady operating modes and thermal runaway conditions of the Ag-sheathed Bi2Sr 2CaCu2O8 composite superconductors are theoretically studied in DC magnetic fields. It is shown that the temperature of a composite is not equal to the coolant temperature before thermal runaway. As a result, the shape of the voltage-current characteristics of high-Tc superconducting composites has only a positive slope during continuous current charging both before and after thermal runaway. That is why the voltage-current characteristics of high-Tc superconductors do not define the boundary of the thermal runaway. This peculiarity has to be considered during experiments at which the critical or quench currents are defined.

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KW - Overheating

KW - Thermal runaway

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Steady and unsteady current modes and thermal runaway conditions of high-T_C composite superconductors

Abstract

Keywords

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