A 1.8 K current feedthrough using YBCO bulk conductor for supplying 20 kA

K. Maehata; K. Ishibashi; T. Shintomi; A. Iwamoto; R. Maekawa; T. Mito

doi:10.1016/j.physc.2005.02.079

A 1.8 K current feedthrough using YBCO bulk conductor for supplying 20 kA

K. Maehata
, K. Ishibashi
, T. Shintomi
, A. Iwamoto
, R. Maekawa
, T. Mito

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

1 Scopus citations

Abstract

Rectangle-shaped YBCO bulk conductors 20 mm wide, 140 mm long and 10 mm thick were manufactured from square-pillar-shaped YBCO bulk materials for supplying a 20 kA current into a pressurized superfluid cooling region at a temperature of 1.8 K. An assembled 1.8 K current feedthrough was mounted in the λ-plate of a pressurized superfluid cooling cryostat. Current-feed experiments into the 1.8 K region were carried out by operating the 20 kA current feedthrough. In the experiments, the transport current was kept at 20 kA for longer than 1200 s. Contact resistance and Joule heat generation in the joint region between the YBCO bulk conductors and the copper electrode were 1.45 nΩ and 0.72 W, respectively, in the 20 kA operation.

Original language	English
Pages (from-to)	770-776
Number of pages	7
Journal	Physica C: Superconductivity and its Applications
Volume	426-431
Issue number	I
DOIs	https://doi.org/10.1016/j.physc.2005.02.079
State	Published - Oct 1 2005
Externally published	Yes
Event	Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity - Duration: Nov 23 2004 → Nov 25 2004

Funding

The authors would like to thank Fuji Electric Co., Ltd for their collaboration in the development of the 1.8 K current feedthrough. We also wish to express our thanks to Nippon Steel Co. for their work in developing the large-sized YBCO bulk conductors. This work was performed with the support and under the auspices of the NIFS LHD Project Research Collaboration.

Keywords

Current feedthrough
Large-sized bulk conductor
Y-based cuprates

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10.1016/j.physc.2005.02.079

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title = "A 1.8 K current feedthrough using YBCO bulk conductor for supplying 20 kA",

abstract = "Rectangle-shaped YBCO bulk conductors 20 mm wide, 140 mm long and 10 mm thick were manufactured from square-pillar-shaped YBCO bulk materials for supplying a 20 kA current into a pressurized superfluid cooling region at a temperature of 1.8 K. An assembled 1.8 K current feedthrough was mounted in the λ-plate of a pressurized superfluid cooling cryostat. Current-feed experiments into the 1.8 K region were carried out by operating the 20 kA current feedthrough. In the experiments, the transport current was kept at 20 kA for longer than 1200 s. Contact resistance and Joule heat generation in the joint region between the YBCO bulk conductors and the copper electrode were 1.45 nΩ and 0.72 W, respectively, in the 20 kA operation.",

keywords = "Current feedthrough, Large-sized bulk conductor, Y-based cuprates",

author = "K. Maehata and K. Ishibashi and T. Shintomi and A. Iwamoto and R. Maekawa and T. Mito",

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T1 - A 1.8 K current feedthrough using YBCO bulk conductor for supplying 20 kA

AU - Maehata, K.

AU - Ishibashi, K.

AU - Shintomi, T.

AU - Iwamoto, A.

AU - Maekawa, R.

AU - Mito, T.

PY - 2005/10/1

Y1 - 2005/10/1

N2 - Rectangle-shaped YBCO bulk conductors 20 mm wide, 140 mm long and 10 mm thick were manufactured from square-pillar-shaped YBCO bulk materials for supplying a 20 kA current into a pressurized superfluid cooling region at a temperature of 1.8 K. An assembled 1.8 K current feedthrough was mounted in the λ-plate of a pressurized superfluid cooling cryostat. Current-feed experiments into the 1.8 K region were carried out by operating the 20 kA current feedthrough. In the experiments, the transport current was kept at 20 kA for longer than 1200 s. Contact resistance and Joule heat generation in the joint region between the YBCO bulk conductors and the copper electrode were 1.45 nΩ and 0.72 W, respectively, in the 20 kA operation.

AB - Rectangle-shaped YBCO bulk conductors 20 mm wide, 140 mm long and 10 mm thick were manufactured from square-pillar-shaped YBCO bulk materials for supplying a 20 kA current into a pressurized superfluid cooling region at a temperature of 1.8 K. An assembled 1.8 K current feedthrough was mounted in the λ-plate of a pressurized superfluid cooling cryostat. Current-feed experiments into the 1.8 K region were carried out by operating the 20 kA current feedthrough. In the experiments, the transport current was kept at 20 kA for longer than 1200 s. Contact resistance and Joule heat generation in the joint region between the YBCO bulk conductors and the copper electrode were 1.45 nΩ and 0.72 W, respectively, in the 20 kA operation.

KW - Current feedthrough

KW - Large-sized bulk conductor

KW - Y-based cuprates

UR - https://www.scopus.com/pages/publications/25644437067

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DO - 10.1016/j.physc.2005.02.079

M3 - Conference article

AN - SCOPUS:25644437067

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VL - 426-431

SP - 770

EP - 776

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - I

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

Y2 - 23 November 2004 through 25 November 2004

ER -

A 1.8 K current feedthrough using YBCO bulk conductor for supplying 20 kA

Abstract

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Keywords

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