Initiation of thermal runaway in a 1 T cryocooler-cooled oxide superconducting pulsed coil in AC operation

H. Miyazaki; S. Harada; M. Iwakuma; K. Funaki; H. Hayashi; A. Tomioka

doi:10.1016/j.physc.2005.03.074

Initiation of thermal runaway in a 1 T cryocooler-cooled oxide superconducting pulsed coil in AC operation

H. Miyazaki, S. Harada, M. Iwakuma, K. Funaki, H. Hayashi, A. Tomioka

Research output: Contribution to journal › Conference article › peer-review

Abstract

We experimentally studied thermal runaway in a Bi2223 pulsed coil cooled by a cryocooler. It was found the total heat generation of the coil in thermal runaway was remarkably lower than the cooling capacity of the cryocooler. We simulated the total heat generation of flux-flow loss and AC loss in the winding from the experimental results of the external field losses and the E-J characteristics for the Bi2223 strands in order to estimate the thermal runaway in AC operation. The simulation shows that the thermal runaway is induced by the flux-flow loss localized in both coil sides, which is enhanced with increasing the coil temperature.

Original language	English
Pages (from-to)	1397-1401
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	426-431
Issue number	II
DOIs	https://doi.org/10.1016/j.physc.2005.03.074
Publication status	Published - 2005
Event	Proceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity - Duration: Nov 23 2004 → Nov 25 2004

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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10.1016/j.physc.2005.03.074

Cite this

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title = "Initiation of thermal runaway in a 1 T cryocooler-cooled oxide superconducting pulsed coil in AC operation",

abstract = "We experimentally studied thermal runaway in a Bi2223 pulsed coil cooled by a cryocooler. It was found the total heat generation of the coil in thermal runaway was remarkably lower than the cooling capacity of the cryocooler. We simulated the total heat generation of flux-flow loss and AC loss in the winding from the experimental results of the external field losses and the E-J characteristics for the Bi2223 strands in order to estimate the thermal runaway in AC operation. The simulation shows that the thermal runaway is induced by the flux-flow loss localized in both coil sides, which is enhanced with increasing the coil temperature.",

author = "H. Miyazaki and S. Harada and M. Iwakuma and K. Funaki and H. Hayashi and A. Tomioka",

note = "Funding Information: This research was partly supported by the 21st Century COE Program “Reconstruction of Social Infrastructure Related to Information Science and Electrical Engineering” in Kyushu University.; Proceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity ; Conference date: 23-11-2004 Through 25-11-2004",

year = "2005",

doi = "10.1016/j.physc.2005.03.074",

language = "English",

volume = "426-431",

pages = "1397--1401",

journal = "Physica C: Superconductivity and its applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "II",

}

TY - JOUR

T1 - Initiation of thermal runaway in a 1 T cryocooler-cooled oxide superconducting pulsed coil in AC operation

AU - Miyazaki, H.

AU - Harada, S.

AU - Iwakuma, M.

AU - Funaki, K.

AU - Hayashi, H.

AU - Tomioka, A.

N1 - Funding Information: This research was partly supported by the 21st Century COE Program “Reconstruction of Social Infrastructure Related to Information Science and Electrical Engineering” in Kyushu University.

PY - 2005

Y1 - 2005

N2 - We experimentally studied thermal runaway in a Bi2223 pulsed coil cooled by a cryocooler. It was found the total heat generation of the coil in thermal runaway was remarkably lower than the cooling capacity of the cryocooler. We simulated the total heat generation of flux-flow loss and AC loss in the winding from the experimental results of the external field losses and the E-J characteristics for the Bi2223 strands in order to estimate the thermal runaway in AC operation. The simulation shows that the thermal runaway is induced by the flux-flow loss localized in both coil sides, which is enhanced with increasing the coil temperature.

AB - We experimentally studied thermal runaway in a Bi2223 pulsed coil cooled by a cryocooler. It was found the total heat generation of the coil in thermal runaway was remarkably lower than the cooling capacity of the cryocooler. We simulated the total heat generation of flux-flow loss and AC loss in the winding from the experimental results of the external field losses and the E-J characteristics for the Bi2223 strands in order to estimate the thermal runaway in AC operation. The simulation shows that the thermal runaway is induced by the flux-flow loss localized in both coil sides, which is enhanced with increasing the coil temperature.

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U2 - 10.1016/j.physc.2005.03.074

DO - 10.1016/j.physc.2005.03.074

M3 - Conference article

AN - SCOPUS:25444526893

SN - 0921-4534

VL - 426-431

SP - 1397

EP - 1401

JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

IS - II

T2 - Proceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity

Y2 - 23 November 2004 through 25 November 2004

ER -

Initiation of thermal runaway in a 1 T cryocooler-cooled oxide superconducting pulsed coil in AC operation

Abstract

All Science Journal Classification (ASJC) codes

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