Effects of Cu stabilizer configuration on thermal stability of Nb 3Sn composite superconductors under cryocooling condition

Kenji Watanabe; T. Mitsuhashi; Nozomu Nanato; S. B. Kim; S. Murase; G. Nishijima; Kazuo Watanabe; K. Miyoshi

doi:10.1109/TASC.2005.848946

Effects of Cu stabilizer configuration on thermal stability of Nb ₃Sn composite superconductors under cryocooling condition

Kenji Watanabe, T. Mitsuhashi, Nozomu Nanato, S. B. Kim, S. Murase, G. Nishijima, Kazuo Watanabe, K. Miyoshi

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

1 Citation (Scopus)

Abstract

It is known that current sharing effects of the stabilizer are limited in cryocooling conditions being different from poolboiling. Therefore we have studied stability under it, focusing on minimum quench energy (MQE) of Nb ₃Sn superconductors under various conditions of the applied magnetic field, temperature, and the transport current, for various volume fractions and configurations of Cu stabilizer. From the experimental results, the larger the external Cu volume fraction, the higher the MQE was obtained. All MQE data were summarized by only one line in characteristics of normalized MQE and normalized B (B/B _c2). The obtained MQE behavior was to be characterized by only one empirical equation. It is thought that the obtained formula is useful for a standard of designing the Nb ₃Sn superconductor and its coil under cryocooled condition.

Original language	English
Pages (from-to)	3410-3413
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	15
Issue number	2 PART III
DOIs	https://doi.org/10.1109/TASC.2005.848946
Publication status	Published - Jun 2005

Keywords

Cryocooling
MQE
Nb Sn wire
Thermal stability

ASJC Scopus subject areas

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

Access to Document

10.1109/TASC.2005.848946

Cite this

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title = "Effects of Cu stabilizer configuration on thermal stability of Nb 3Sn composite superconductors under cryocooling condition",

abstract = "It is known that current sharing effects of the stabilizer are limited in cryocooling conditions being different from poolboiling. Therefore we have studied stability under it, focusing on minimum quench energy (MQE) of Nb 3Sn superconductors under various conditions of the applied magnetic field, temperature, and the transport current, for various volume fractions and configurations of Cu stabilizer. From the experimental results, the larger the external Cu volume fraction, the higher the MQE was obtained. All MQE data were summarized by only one line in characteristics of normalized MQE and normalized B (B/B c2). The obtained MQE behavior was to be characterized by only one empirical equation. It is thought that the obtained formula is useful for a standard of designing the Nb 3Sn superconductor and its coil under cryocooled condition.",

keywords = "Cryocooling, MQE, Nb Sn wire, Thermal stability",

author = "Kenji Watanabe and T. Mitsuhashi and Nozomu Nanato and Kim, {S. B.} and S. Murase and G. Nishijima and Kazuo Watanabe and K. Miyoshi",

year = "2005",

month = jun,

doi = "10.1109/TASC.2005.848946",

language = "English",

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T1 - Effects of Cu stabilizer configuration on thermal stability of Nb 3Sn composite superconductors under cryocooling condition

AU - Watanabe, Kenji

AU - Mitsuhashi, T.

AU - Nanato, Nozomu

AU - Kim, S. B.

AU - Murase, S.

AU - Nishijima, G.

AU - Watanabe, Kazuo

AU - Miyoshi, K.

PY - 2005/6

Y1 - 2005/6

N2 - It is known that current sharing effects of the stabilizer are limited in cryocooling conditions being different from poolboiling. Therefore we have studied stability under it, focusing on minimum quench energy (MQE) of Nb 3Sn superconductors under various conditions of the applied magnetic field, temperature, and the transport current, for various volume fractions and configurations of Cu stabilizer. From the experimental results, the larger the external Cu volume fraction, the higher the MQE was obtained. All MQE data were summarized by only one line in characteristics of normalized MQE and normalized B (B/B c2). The obtained MQE behavior was to be characterized by only one empirical equation. It is thought that the obtained formula is useful for a standard of designing the Nb 3Sn superconductor and its coil under cryocooled condition.

AB - It is known that current sharing effects of the stabilizer are limited in cryocooling conditions being different from poolboiling. Therefore we have studied stability under it, focusing on minimum quench energy (MQE) of Nb 3Sn superconductors under various conditions of the applied magnetic field, temperature, and the transport current, for various volume fractions and configurations of Cu stabilizer. From the experimental results, the larger the external Cu volume fraction, the higher the MQE was obtained. All MQE data were summarized by only one line in characteristics of normalized MQE and normalized B (B/B c2). The obtained MQE behavior was to be characterized by only one empirical equation. It is thought that the obtained formula is useful for a standard of designing the Nb 3Sn superconductor and its coil under cryocooled condition.

KW - Cryocooling

KW - MQE

KW - Nb Sn wire

KW - Thermal stability

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