Performance Test of 20-Stacked Two-Tapes-Bundled REBCO Pancake Coils for Upgrading of 25-T Cryogen-Free Superconducting Magnet to 30 T

Takahashi, Kohki; Badel, Arnaud; Zampa, Alexandre; Okada, Tatsunori; Awaji, Satoshi; Nishijima, G.; Uto, Tatsuro; Takewa, H; Hanai, S.; Ioka, S.; Inagaki, J.

doi:10.1109/tasc.2023.3252496

Cited by 7 publications

(4 citation statements)

References 21 publications

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“…This should correspond 0.215 % elongation considering the Young Modulus of the conductor. The strain measurement detailed in [12] reach 0.23 % for circumferential elongation at outer turn, which is in good agreement. Estimations of the radial stress in the FRP flanges is presented Fig.…”

Section: Mechanical Modelling and Validation Of Mechanical Performancessupporting

confidence: 75%

“…After assembly the coil was equipped with strain gauges at the outer diameter for circumferential and axial strain measurements. More details on the pancake preliminary tests, the coil and its strain instrumentation can be found in [12].…”

Section: Winding Characteristics and Test Environmentmentioning

confidence: 99%

“…Multiple plateau were also made to check for contact degradations due to stress increase. No such degradation were observed (see [12] for more details)…”

Section: B Detection System Implementation and Tests For 20 Pancake Coilmentioning

confidence: 99%

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First Validation of Robust REBCO Insert Concept on a Large 20-Pancake Prototype Reaching Up to 25 T

Badel

Takahashi

Zampa

et al. 2023

IEEE Trans. Appl. Supercond.

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We recently proposed a robust REBCO insert coil concept in the framework of a project to upgrade the 25 T CSM magnet at HFLSM with a new REBCO insert to reach 30 T. In this concept, the conductor consists of a two-tape bundle to mitigate the risks posed by local tape degradation. So-called edge impregnation is used to enhance the mechanical stiffness while reducing delamination risk, providing conduction-cooling capability at the same time. This insert is to be protected against the risk of thermal runaway simply by using dump resistor, thanks to an early detection concept. The different ideas forming the robust REBCO insert coil concept were tested successfully on various small scale prototypes. We report here their first implementation on a large-size insert coil, consisting of 20 stacked pancakes from the 30 T CSM upgrade insert. The mechanical behavior of the coil is modelled and validated with experiments. The thermal runaway detection setup is introduced. Its sensitivity and selectivity is discussed based on previous works on thermal runaway scenarios.

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Section: Mechanical Modelling and Validation Of Mechanical Performancessupporting

confidence: 75%

Section: Winding Characteristics and Test Environmentmentioning

confidence: 99%

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First Validation of Robust REBCO Insert Concept on a Large 20-Pancake Prototype Reaching Up to 25 T

Badel

Takahashi

Zampa

et al. 2023

IEEE Trans. Appl. Supercond.

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“…At Institute for Materials Research of Tohoku University, a 25 T superconducting magnet cooled by cryocooling system, in which a magnet wound with Bi2223 tapes is inserted into a magnet using metallic superconductors, has been managed as a joint‐use facility. Further enhancement of magnetic fields of the system up to 30 T is considered by replacing the insert coil made of RE123 tapes [50]. In addition, a superconducting magnet with a center magnetic field of 28.2 T, in which a coil using RE123 tapes made by Fujikura is inserted, is used in the commercial 1.2 GHz‐NMR system developed by Bruker.…”

Section: Applications Using High Temperature Superconducting Materialsmentioning

confidence: 99%

Current Status of High Temperature Superconducting Materials and their Various Applications

Shimoyama,

Motoki

2023

IEEJ Transactions Elec Engng

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It took longer time than initially expected for development of cuprate superconducting materials for practical applications. However, there are about 20 companies that manufacture and supply long conductors and bulk materials at present. Although various large‐scale projects have supported the process of material development, material and equipment developments have been progressing under the leadership of manufacturers in recent years. In this paper, current status of development of high‐temperature superconducting materials, including MgB2, which is classified as a high temperature superconductor, and their applications are summarized, along with the history, basic physical features and recent topics. © 2023 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

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Screening and Coupling Currents Induced Fields on a Large-Scale Prototype REBCO Insulated Coil

Zampa,

Takahashi,

Tsuchiya

et al. 2024

IEEE Trans. Appl. Supercond.

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Performance Test of 20-Stacked Two-Tapes-Bundled REBCO Pancake Coils for Upgrading of 25-T Cryogen-Free Superconducting Magnet to 30 T

Cited by 7 publications

References 21 publications

First Validation of Robust REBCO Insert Concept on a Large 20-Pancake Prototype Reaching Up to 25 T

First Validation of Robust REBCO Insert Concept on a Large 20-Pancake Prototype Reaching Up to 25 T

Current Status of High Temperature Superconducting Materials and their Various Applications

Screening and Coupling Currents Induced Fields on a Large-Scale Prototype REBCO Insulated Coil

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