Design prospect of remountable high-temperature superconducting magnet

Hidetoshi Hashizume; Satoshi Ito

doi:10.1016/j.fusengdes.2013.12.014

Design prospect of remountable high-temperature superconducting magnet

Hidetoshi Hashizume, Satoshi Ito

ENG - Quantum Science and Energy Engineering

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

11 Citations (Scopus)

Abstract

The remountable (mountable and demountable repeatedly) high-temperature superconducting (HTS) magnet has been proposed for huge and complex superconducting magnets in future fusion reactors to fabricate and repair easily the magnet and access inner structural components. This paper summarizes progress in R&D activities of mechanical joints of HTS conductors in terms of the electrical resistance and heat transfer performance at the joint region. The latest experimental results show the low joint resistance, 4 nΩ under 70 kA current condition using REBCO HTS conductor with mechanical lap joint system, and for the cooling system the maximum heat flux of 0.4 MW/m² is removed by using bronze sintered porous media with sub-cooled liquid nitrogen. These values indicate that there is large possibility to design the remountable HTS magnet for fusion reactors.

Original language	English
Pages (from-to)	2241-2245
Number of pages	5
Journal	Fusion Engineering and Design
Volume	89
Issue number	9-10
DOIs	https://doi.org/10.1016/j.fusengdes.2013.12.014
Publication status	Published - 2014 Oct

Keywords

Cryogenic coolant
Heat transfer enhancement
High-temperature superconductor
Mechanical joint
Porous media
Superconducting magnet

ASJC Scopus subject areas

Civil and Structural Engineering
Nuclear Energy and Engineering
Materials Science(all)
Mechanical Engineering

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10.1016/j.fusengdes.2013.12.014

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Cite this

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title = "Design prospect of remountable high-temperature superconducting magnet",

abstract = "The remountable (mountable and demountable repeatedly) high-temperature superconducting (HTS) magnet has been proposed for huge and complex superconducting magnets in future fusion reactors to fabricate and repair easily the magnet and access inner structural components. This paper summarizes progress in R&D activities of mechanical joints of HTS conductors in terms of the electrical resistance and heat transfer performance at the joint region. The latest experimental results show the low joint resistance, 4 nΩ under 70 kA current condition using REBCO HTS conductor with mechanical lap joint system, and for the cooling system the maximum heat flux of 0.4 MW/m2 is removed by using bronze sintered porous media with sub-cooled liquid nitrogen. These values indicate that there is large possibility to design the remountable HTS magnet for fusion reactors.",

keywords = "Cryogenic coolant, Heat transfer enhancement, High-temperature superconductor, Mechanical joint, Porous media, Superconducting magnet",

author = "Hidetoshi Hashizume and Satoshi Ito",

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AU - Ito, Satoshi

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AB - The remountable (mountable and demountable repeatedly) high-temperature superconducting (HTS) magnet has been proposed for huge and complex superconducting magnets in future fusion reactors to fabricate and repair easily the magnet and access inner structural components. This paper summarizes progress in R&D activities of mechanical joints of HTS conductors in terms of the electrical resistance and heat transfer performance at the joint region. The latest experimental results show the low joint resistance, 4 nΩ under 70 kA current condition using REBCO HTS conductor with mechanical lap joint system, and for the cooling system the maximum heat flux of 0.4 MW/m2 is removed by using bronze sintered porous media with sub-cooled liquid nitrogen. These values indicate that there is large possibility to design the remountable HTS magnet for fusion reactors.

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