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

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

研究成果: ジャーナルへの寄稿Conference article

抄録

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.

元の言語英語
ページ(範囲)1397-1401
ページ数5
ジャーナルPhysica C: Superconductivity and its applications
426-431
発行部数II
DOI
出版物ステータス出版済み - 10 6 2005
イベントProceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity -
継続期間: 11 23 200411 25 2004

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Oxides
alternating current
coils
oxides
heat generation
Heat generation
Enthalpy
Fluxes
strands
Cooling
cooling
Hot Temperature
estimates
simulation
Temperature
temperature

All Science Journal Classification (ASJC) codes

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

これを引用

Initiation of thermal runaway in a 1 T cryocooler-cooled oxide superconducting pulsed coil in AC operation. / Miyazaki, H.; Harada, S.; Iwakuma, Masataka; Funaki, K.; Hayashi, H.; Tomioka, A.

:: Physica C: Superconductivity and its applications, 巻 426-431, 番号 II, 06.10.2005, p. 1397-1401.

研究成果: ジャーナルへの寄稿Conference article

Miyazaki, H. ; Harada, S. ; Iwakuma, Masataka ; Funaki, K. ; Hayashi, H. ; Tomioka, A. / Initiation of thermal runaway in a 1 T cryocooler-cooled oxide superconducting pulsed coil in AC operation. :: Physica C: Superconductivity and its applications. 2005 ; 巻 426-431, 番号 II. pp. 1397-1401.
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AU - Miyazaki, H.

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AU - Hayashi, H.

AU - Tomioka, A.

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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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