### 抄録

We fabricated a cryocooler-cooled Bi2223 superconducting pulsed coil and experimentally studied the thermal run-away in dc or ac operation. We carried out numerical simulation of thermal properties of the coil in order to explain the thermal runaway of the coil. Firstly, we analyzed the total heat generation of flux-flow losses and ac losses inside the winding from the experimental results of the external field losses and the E - J characteristics for the Bi2223 strands. Secondly, we numerically simulated the thermal properties by using a 2-dimensional heat conduction equation with axial symmetry. The numerical simulation shows the relation between the initiation of thermal runaway and the temperature distribution with highly concentrated heat source in the winding. We have a semi-quantitative agreement between the numerical results and the experimental ones for the condition of the thermal runaway.

元の言語 | 英語 |
---|---|

記事番号 | 1643200 |

ページ（範囲） | 1749-1752 |

ページ数 | 4 |

ジャーナル | IEEE Transactions on Applied Superconductivity |

巻 | 16 |

発行部数 | 2 |

DOI | |

出版物ステータス | 出版済み - 6 1 2006 |

### Fingerprint

### All Science Journal Classification (ASJC) codes

- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering

### これを引用

*IEEE Transactions on Applied Superconductivity*,

*16*(2), 1749-1752. [1643200]. https://doi.org/10.1109/TASC.2006.873266

**Numerical simulation of thermal properties of a cryocooler-cooled Bi2223 superconducting pulsed coil in AC operation.** / Miyazaki, H.; Chigusa, S.; Tanaka, I.; Iwakuma, Masataka; Funaki, K.; Hayashi, H.; Tomioka, A.

研究成果: ジャーナルへの寄稿 › 記事

*IEEE Transactions on Applied Superconductivity*, 巻. 16, 番号 2, 1643200, pp. 1749-1752. https://doi.org/10.1109/TASC.2006.873266

}

TY - JOUR

T1 - Numerical simulation of thermal properties of a cryocooler-cooled Bi2223 superconducting pulsed coil in AC operation

AU - Miyazaki, H.

AU - Chigusa, S.

AU - Tanaka, I.

AU - Iwakuma, Masataka

AU - Funaki, K.

AU - Hayashi, H.

AU - Tomioka, A.

PY - 2006/6/1

Y1 - 2006/6/1

N2 - We fabricated a cryocooler-cooled Bi2223 superconducting pulsed coil and experimentally studied the thermal run-away in dc or ac operation. We carried out numerical simulation of thermal properties of the coil in order to explain the thermal runaway of the coil. Firstly, we analyzed the total heat generation of flux-flow losses and ac losses inside the winding from the experimental results of the external field losses and the E - J characteristics for the Bi2223 strands. Secondly, we numerically simulated the thermal properties by using a 2-dimensional heat conduction equation with axial symmetry. The numerical simulation shows the relation between the initiation of thermal runaway and the temperature distribution with highly concentrated heat source in the winding. We have a semi-quantitative agreement between the numerical results and the experimental ones for the condition of the thermal runaway.

AB - We fabricated a cryocooler-cooled Bi2223 superconducting pulsed coil and experimentally studied the thermal run-away in dc or ac operation. We carried out numerical simulation of thermal properties of the coil in order to explain the thermal runaway of the coil. Firstly, we analyzed the total heat generation of flux-flow losses and ac losses inside the winding from the experimental results of the external field losses and the E - J characteristics for the Bi2223 strands. Secondly, we numerically simulated the thermal properties by using a 2-dimensional heat conduction equation with axial symmetry. The numerical simulation shows the relation between the initiation of thermal runaway and the temperature distribution with highly concentrated heat source in the winding. We have a semi-quantitative agreement between the numerical results and the experimental ones for the condition of the thermal runaway.

UR - http://www.scopus.com/inward/record.url?scp=33746627702&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33746627702&partnerID=8YFLogxK

U2 - 10.1109/TASC.2006.873266

DO - 10.1109/TASC.2006.873266

M3 - Article

AN - SCOPUS:33746627702

VL - 16

SP - 1749

EP - 1752

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

SN - 1051-8223

IS - 2

M1 - 1643200

ER -