Removal of degradation of the performance of an epoxy impregnated YBCO-coated conductor double pancake coil by using a polyimide-electrodeposited YBCO-coated conductor

Yanagisawa, Yoshinori; Sato, Kyosuke; Piao, Rui‐Qi; Nakagome, Hideki; Takematsu, T.; Takao, T.; Kamibayashi, H.; Takahashi, Masato; Maeda, Hideaki

doi:10.1016/j.physc.2012.01.025

Cited by 75 publications

(41 citation statements)

References 6 publications

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“…A thorough investigation on the subject, including tests and FEM analysis, was carried out by Yanagisawa et al [72]. This research group [77] found that degradation of the epoxy impregnated RE123 coil is eliminated if a polyimide-electrodeposited (PIED) insulation of thickness 15-30 μm is applied to the tape conductor. The transverse stress on the tape is reduced owning to (1) plastic deformation of the ductile polyimide and (2) easily debondable epoxy resin.…”

Section: Shear Stress >19mentioning

confidence: 99%

Progresses and challenges in the development of high-field solenoidal magnets based on RE123 coated conductors

Senatore

Alessandrini

Lucarelli

et al. 2014

Supercond. Sci. Technol.

255

136

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Recent progresses in the second generation REBa 2 Cu 3 O 7 − x (RE123) coated conductor (CC) have paved a way for the development of superconducting solenoids capable of generating fields well above 23.5 T, i.e. the limit of NbTi−Nb 3 Sn-based magnets. However, the RE123 magnet still poses several fundamental and engineering challenges. In this work we review the state-ofthe-art of conductor and magnet technologies. The goal is to illustrate a close synergetic relationship between evolution of high-field magnets and advancement in superconductor technology. The paper is organized in three parts: (1) the basics of RE123 CC fabrication technique, including latest developments to improve conductor performance and production throughput; (2) critical issues and innovative design concepts for the RE123-based magnet; and (3) an overview of noteworthy ongoing magnet projects.

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Section: Shear Stress >19mentioning

confidence: 99%

Progresses and challenges in the development of high-field solenoidal magnets based on RE123 coated conductors

Senatore

Alessandrini

Lucarelli

et al. 2014

Supercond. Sci. Technol.

255

136

View full text Add to dashboard Cite

show abstract

“…Epoxy resins like Stycast are known to be used in cryogenic applications [19], for instance, as an encapsulating material for HTS coils to prevent movement of CC tapes and to ensure even distribution of loads [20][21][22][23]. Generally speaking, coefficient of thermal expansion (CTE) of epoxy resins is much larger than CTE of Hastelloy C276 ® , usually used as a substrate of CC tapes, and their thermal conductivity is very low.…”

Section: Introductionmentioning

confidence: 99%

Composite Heat Sink Material for Superconducting Tape in Fault Current Limiter Applications

et al. 2020

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We enhanced the performance of superconducting tapes during quenching by coating the tapes with various composites, with regards to the application of such coated systems in superconducting fault current limiters. In composition of the coating, we varied the type of epoxy matrix, the content of ceramic filler particles and the use of reinforcement in order to optimize the thermal and the mechanical stability of the coated tapes. By this way modified superconducting tapes were able to reduce the maximum temperature 170 °C of not modified superconducting tape to 55 °C during the quench with electric field up to 130 V m−1.

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“…One approach to address this issue is to tailor the mechanical properties of the epoxy so as to mitigate the tape degradation as much as possible [112,[115][116][117][118], although non-negligible I c degradation still occurs in some cases when the epoxy touches the REBCO tapes [37,111]. A most effective approach appears to be completely shielding REBCO tapes from epoxy [15,116,119]. For all these solutions, a concern is poor or non-exisitent electrcal contact between tapes, which prevents good current sharing inside a multi-tape conductor (Section 3.4).…”

Section: How To Make High-field Accelerator Magnets Using Multi-tape mentioning

confidence: 99%

Dipole Magnets above 20 Tesla: Research Needs for a Path via High-Temperature Superconducting REBCO Conductors

2019

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To enable the physics research that continues to deepen our understanding of the Universe, future circular colliders will require a critical and unique instrument—magnets that can generate a dipole field of 20 T and above. However, today’s maturing magnet technology for low-temperature superconductors (Nb-Ti and Nb 3 Sn) can lead to a maximum dipole field of around 16 T. High-temperature superconductors such as REBCO can, in principle, generate higher dipole fields but significant challenges exist for both conductor and magnet technology. To address these challenges, several critical research needs, including direct needs on instrumentation and measurements, are identified to push for the maximum dipole fields a REBCO accelerator magnet can generate. We discuss the research needs by reviewing the current results and outlining the perspectives for future technology development, followed by a brief update on the status of the technology development at Lawrence Berkeley National Laboratory. We present a roadmap for the next decade to develop 20 T-class REBCO accelerator magnets as an enabling instrument for future energy-frontier accelerator complex.

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Removal of degradation of the performance of an epoxy impregnated YBCO-coated conductor double pancake coil by using a polyimide-electrodeposited YBCO-coated conductor

Cited by 75 publications

References 6 publications

Progresses and challenges in the development of high-field solenoidal magnets based on RE123 coated conductors

Progresses and challenges in the development of high-field solenoidal magnets based on RE123 coated conductors

Composite Heat Sink Material for Superconducting Tape in Fault Current Limiter Applications

Dipole Magnets above 20 Tesla: Research Needs for a Path via High-Temperature Superconducting REBCO Conductors

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