Performance Test of Cryogen-Free Bi-2223 HTS Dipole Magnet for Beam Line Switching

Jun Yoshida; Atsushi Hashimoto; Hitoshi Mitsubori; Yukio Mikami; Keiichi Watazawa; Kichiji Hatanaka; Hiroshi Ueda; Mitsuhiro Fukuda; Tetsuhiko Yorita; Eisaku Ueno; Takeshi Kato

doi:10.1109/TASC.2016.2528543

Performance Test of Cryogen-Free Bi-2223 HTS Dipole Magnet for Beam Line Switching

Jun Yoshida, Atsushi Hashimoto, Hitoshi Mitsubori, Yukio Mikami, Keiichi Watazawa, Kichiji Hatanaka, Hiroshi Ueda, Mitsuhiro Fukuda, Tetsuhiko Yorita, Eisaku Ueno, Takeshi Kato

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

5 Citations (Scopus)

Abstract

We have developed a Bi-2223 high-temperature superconducting dipole magnet for beam line switching at the cyclotron facility of the Research Center for Nuclear Physics, Osaka University. Exit beam lines are periodically switched by increasing and decreasing the magnetic field between 0 and 1.6 T with a switching time of 10 s. The magnet is equipped with two sets of Bi-2223 coil assemblies, which are conduction cooled by two 10-K Gifford-McMahon cryocoolers. We evaluated the superconducting property of the Bi-2223 coil assemblies in liquid nitrogen before installation in the cryostat. There were no degradation in wire performance during the assembly process. Magnetic field, strains, and temperatures of the coil assembly were investigated for performance verification after the magnet fabrication. The magnetic field and the temperatures meet specifications, and the deformation of the coil assembly is considered to be successfully suppressed by reinforcing structure. Furthermore, from a viewpoint of temperature, it is indicated that the magnet can make switching time and cycle time faster than that of the specified operation.

Original language	English
Article number	7404252
Journal	IEEE Transactions on Applied Superconductivity
Volume	26
Issue number	3
DOIs	https://doi.org/10.1109/TASC.2016.2528543
Publication status	Published - Apr 2016
Externally published	Yes

Keywords

Accelerator magnets
high-temperature superconductors
superconducting coils
superconducting magnets

ASJC Scopus subject areas

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

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10.1109/TASC.2016.2528543

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title = "Performance Test of Cryogen-Free Bi-2223 HTS Dipole Magnet for Beam Line Switching",

abstract = "We have developed a Bi-2223 high-temperature superconducting dipole magnet for beam line switching at the cyclotron facility of the Research Center for Nuclear Physics, Osaka University. Exit beam lines are periodically switched by increasing and decreasing the magnetic field between 0 and 1.6 T with a switching time of 10 s. The magnet is equipped with two sets of Bi-2223 coil assemblies, which are conduction cooled by two 10-K Gifford-McMahon cryocoolers. We evaluated the superconducting property of the Bi-2223 coil assemblies in liquid nitrogen before installation in the cryostat. There were no degradation in wire performance during the assembly process. Magnetic field, strains, and temperatures of the coil assembly were investigated for performance verification after the magnet fabrication. The magnetic field and the temperatures meet specifications, and the deformation of the coil assembly is considered to be successfully suppressed by reinforcing structure. Furthermore, from a viewpoint of temperature, it is indicated that the magnet can make switching time and cycle time faster than that of the specified operation.",

keywords = "Accelerator magnets, high-temperature superconductors, superconducting coils, superconducting magnets",

author = "Jun Yoshida and Atsushi Hashimoto and Hitoshi Mitsubori and Yukio Mikami and Keiichi Watazawa and Kichiji Hatanaka and Hiroshi Ueda and Mitsuhiro Fukuda and Tetsuhiko Yorita and Eisaku Ueno and Takeshi Kato",

year = "2016",

month = apr,

doi = "10.1109/TASC.2016.2528543",

language = "English",

volume = "26",

journal = "IEEE Transactions on Applied Superconductivity",

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AU - Yoshida, Jun

AU - Hashimoto, Atsushi

AU - Mitsubori, Hitoshi

AU - Mikami, Yukio

AU - Watazawa, Keiichi

AU - Hatanaka, Kichiji

AU - Ueda, Hiroshi

AU - Fukuda, Mitsuhiro

AU - Yorita, Tetsuhiko

AU - Ueno, Eisaku

AU - Kato, Takeshi

PY - 2016/4

Y1 - 2016/4

N2 - We have developed a Bi-2223 high-temperature superconducting dipole magnet for beam line switching at the cyclotron facility of the Research Center for Nuclear Physics, Osaka University. Exit beam lines are periodically switched by increasing and decreasing the magnetic field between 0 and 1.6 T with a switching time of 10 s. The magnet is equipped with two sets of Bi-2223 coil assemblies, which are conduction cooled by two 10-K Gifford-McMahon cryocoolers. We evaluated the superconducting property of the Bi-2223 coil assemblies in liquid nitrogen before installation in the cryostat. There were no degradation in wire performance during the assembly process. Magnetic field, strains, and temperatures of the coil assembly were investigated for performance verification after the magnet fabrication. The magnetic field and the temperatures meet specifications, and the deformation of the coil assembly is considered to be successfully suppressed by reinforcing structure. Furthermore, from a viewpoint of temperature, it is indicated that the magnet can make switching time and cycle time faster than that of the specified operation.

AB - We have developed a Bi-2223 high-temperature superconducting dipole magnet for beam line switching at the cyclotron facility of the Research Center for Nuclear Physics, Osaka University. Exit beam lines are periodically switched by increasing and decreasing the magnetic field between 0 and 1.6 T with a switching time of 10 s. The magnet is equipped with two sets of Bi-2223 coil assemblies, which are conduction cooled by two 10-K Gifford-McMahon cryocoolers. We evaluated the superconducting property of the Bi-2223 coil assemblies in liquid nitrogen before installation in the cryostat. There were no degradation in wire performance during the assembly process. Magnetic field, strains, and temperatures of the coil assembly were investigated for performance verification after the magnet fabrication. The magnetic field and the temperatures meet specifications, and the deformation of the coil assembly is considered to be successfully suppressed by reinforcing structure. Furthermore, from a viewpoint of temperature, it is indicated that the magnet can make switching time and cycle time faster than that of the specified operation.

KW - Accelerator magnets

KW - high-temperature superconductors

KW - superconducting coils

KW - superconducting magnets

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Performance Test of Cryogen-Free Bi-2223 HTS Dipole Magnet for Beam Line Switching

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Keywords

ASJC Scopus subject areas

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