IEICE TRANSACTIONS on Electronics
Development of Liquid Helium-Free Superconducting Magnet
Summary :
Cryocooler cooled superconducting magnets using Bismuth based high-Tc current leads have been successfully demonstrated. The magnets mainly consisted of a superconducting coil, current leads and a radiation shield which are cooled by a two stage Gifford-McMahon cryocooler without using liquid helium. Our first liquid helium-free 4.6 T (Nb, Ti)3Sn superconducting magnet with a room temperature bore of 38 mm operated at 11 K has recorded a continuous operation at 3.7 T for 1,200 hours and total cooling time over 10,000 hours without trouble. As a next step, we constructed a (Nb, Ti)3Sn liquid helium-free superconducting magnet with a wider room temperature bore of 60 mm. The coil temperature reached 8.3 K in 37 hours after starting the cryocooler. The magnet generated 5.0 T at the center of the 60 mm room temperature bore at an operating current of 140 A. An operation at a field of 5 T was confirmed to be stable even if the cryocooler has been stopped for 4 minutes. These results show that the liquid helium-free superconducting magnets can provide an excellent performance for a new application of the superconducting magnet.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E78-C No.5 pp.535-541
- Publication Date
- 1995/05/25
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- Special Section INVITED PAPER (Special Issue on Superconducting Electronics and Its Applications)
- Category
- Applications of small-size high field superconducting magnet
Authors
Junji SAKURABA
Mamoru ISHIHARA
Seiji YASUHARA
Kazunori JIKIHARA
Keiichi WATAZAWA
Tsuginori HASEBE
Chin Kung CHONG
Yutaka YAMADA
Kazuo WATANABE
Keyword
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Junji SAKURABA, Mamoru ISHIHARA, Seiji YASUHARA, Kazunori JIKIHARA, Keiichi WATAZAWA, Tsuginori HASEBE, Chin Kung CHONG, Yutaka YAMADA, Kazuo WATANABE, "Development of Liquid Helium-Free Superconducting Magnet" in IEICE TRANSACTIONS on Electronics,
vol. E78-C, no. 5, pp. 535-541, May 1995, doi: .
Abstract: Cryocooler cooled superconducting magnets using Bismuth based high-Tc current leads have been successfully demonstrated. The magnets mainly consisted of a superconducting coil, current leads and a radiation shield which are cooled by a two stage Gifford-McMahon cryocooler without using liquid helium. Our first liquid helium-free 4.6 T (Nb, Ti)3Sn superconducting magnet with a room temperature bore of 38 mm operated at 11 K has recorded a continuous operation at 3.7 T for 1,200 hours and total cooling time over 10,000 hours without trouble. As a next step, we constructed a (Nb, Ti)3Sn liquid helium-free superconducting magnet with a wider room temperature bore of 60 mm. The coil temperature reached 8.3 K in 37 hours after starting the cryocooler. The magnet generated 5.0 T at the center of the 60 mm room temperature bore at an operating current of 140 A. An operation at a field of 5 T was confirmed to be stable even if the cryocooler has been stopped for 4 minutes. These results show that the liquid helium-free superconducting magnets can provide an excellent performance for a new application of the superconducting magnet.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e78-c_5_535/_p
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@ARTICLE{e78-c_5_535,
author={Junji SAKURABA, Mamoru ISHIHARA, Seiji YASUHARA, Kazunori JIKIHARA, Keiichi WATAZAWA, Tsuginori HASEBE, Chin Kung CHONG, Yutaka YAMADA, Kazuo WATANABE, },
journal={IEICE TRANSACTIONS on Electronics},
title={Development of Liquid Helium-Free Superconducting Magnet},
year={1995},
volume={E78-C},
number={5},
pages={535-541},
abstract={Cryocooler cooled superconducting magnets using Bismuth based high-Tc current leads have been successfully demonstrated. The magnets mainly consisted of a superconducting coil, current leads and a radiation shield which are cooled by a two stage Gifford-McMahon cryocooler without using liquid helium. Our first liquid helium-free 4.6 T (Nb, Ti)3Sn superconducting magnet with a room temperature bore of 38 mm operated at 11 K has recorded a continuous operation at 3.7 T for 1,200 hours and total cooling time over 10,000 hours without trouble. As a next step, we constructed a (Nb, Ti)3Sn liquid helium-free superconducting magnet with a wider room temperature bore of 60 mm. The coil temperature reached 8.3 K in 37 hours after starting the cryocooler. The magnet generated 5.0 T at the center of the 60 mm room temperature bore at an operating current of 140 A. An operation at a field of 5 T was confirmed to be stable even if the cryocooler has been stopped for 4 minutes. These results show that the liquid helium-free superconducting magnets can provide an excellent performance for a new application of the superconducting magnet.},
keywords={},
doi={},
ISSN={},
month={May},}
Copy
TY - JOUR
TI - Development of Liquid Helium-Free Superconducting Magnet
T2 - IEICE TRANSACTIONS on Electronics
SP - 535
EP - 541
AU - Junji SAKURABA
AU - Mamoru ISHIHARA
AU - Seiji YASUHARA
AU - Kazunori JIKIHARA
AU - Keiichi WATAZAWA
AU - Tsuginori HASEBE
AU - Chin Kung CHONG
AU - Yutaka YAMADA
AU - Kazuo WATANABE
PY - 1995
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E78-C
IS - 5
JA - IEICE TRANSACTIONS on Electronics
Y1 - May 1995
AB - Cryocooler cooled superconducting magnets using Bismuth based high-Tc current leads have been successfully demonstrated. The magnets mainly consisted of a superconducting coil, current leads and a radiation shield which are cooled by a two stage Gifford-McMahon cryocooler without using liquid helium. Our first liquid helium-free 4.6 T (Nb, Ti)3Sn superconducting magnet with a room temperature bore of 38 mm operated at 11 K has recorded a continuous operation at 3.7 T for 1,200 hours and total cooling time over 10,000 hours without trouble. As a next step, we constructed a (Nb, Ti)3Sn liquid helium-free superconducting magnet with a wider room temperature bore of 60 mm. The coil temperature reached 8.3 K in 37 hours after starting the cryocooler. The magnet generated 5.0 T at the center of the 60 mm room temperature bore at an operating current of 140 A. An operation at a field of 5 T was confirmed to be stable even if the cryocooler has been stopped for 4 minutes. These results show that the liquid helium-free superconducting magnets can provide an excellent performance for a new application of the superconducting magnet.
ER -
English
