Design of a 30 T Superconducting Magnet Using a Coated Conductor Insert

Koyanagi, K.; Ono, M.; Hanai, S.; Watanabe, Kazuo; Awaji, Satoshi; Hamajima, T.; Toko, Kiyoshi; Kumakura, Hiroaki

doi:10.1109/tasc.2009.2018271

Cited by 15 publications

(6 citation statements)

References 11 publications

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“…It is interesting to note that for some of these projects there has been a shift from hybrid Bi2223-RE123 coil formation toward all-RE123 formation [164,166,[172][173][174]. This shift may reflect the RE123's steady performance improvement in electromagnetic properties and its inherent mechanical strength advantage over Bi2223.…”

Section: Overview On Ongoing High-field DC Magnet Projects Based On R...mentioning

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: Overview On Ongoing High-field DC Magnet Projects Based On R...mentioning

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

“…Several authors have developed methods to predict the critical current of coils but none applied these methods to ReBCO coils at relatively low magnetic fields or compared the predictions with experiments. Some works simply predict the critical current as the intersection between the load line and the field dependence of the tape critical current at either a parallel or perpendicular applied field [12][13][14][15]. Although this method is quick, it is prone to errors because the lowest critical current is usually at an intermediate angle [16,17].…”

Section: Introductionmentioning

confidence: 99%

Low-magnetic-field dependence and anisotropy of the critical current density in coated conductors

Pardo¹,

Vojenčiak²,

Gömöry³

et al. 2011

Supercond. Sci. Technol.

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Many applications of ReBCO-coated conductors operate at low magnetic fields in the superconductor (below 200 mT). In order to predict the critical current and AC loss in these applications, it is necessary to know the anisotropy and field dependence of the critical current density at low magnetic fields. In this paper, we obtain a formula for the critical current density in a coated conductor as a function of the local magnetic field and its orientation. Afterwards, we apply this formula to predict the critical current of a pancake coil that we constructed. We extract the critical current density of the tape from measurements of the in-field critical current at several orientations. Numerical simulations correct the effect of the self-field in the measurements and successfully predict the critical current in the pancake coil. We found that a simple elliptical model is not enough to describe the anisotropy of the critical current density. In conclusion, the analytical fit that we present is useful to predict the critical current of actual coils. Therefore, it may also be useful for other structures made of coated conductor, like power-transmission cables, Roebel cables and resistive fault current limiters.

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“…(1) (2) where and are the magnitude and the direction of the magnetic field. and stand for the perpendicular and the parallel component of the magnetic field.…”

Section: The Calculation Methods and Analysis Modelmentioning

confidence: 99%

The Optimal Air Gap Between the Pancake Windings in a HTS Magnet Consisting of Insert and Outsert Magnet

Kang

Lee

et al. 2010

IEEE Trans. Appl. Supercond.

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In a high temperature superconducting magnet consisting of pancake windings, the perpendicular magnetic field considerably reduces the value of the critical current of the outer pancake windings due to anisotropy. An air gap was inserted between each pancake winding in this paper to reduce the decrement of the critical current in each pancake winding. In a low temperature superconducting magnet, the central magnetic field decreases when there is an air gap between the pancake windings. On the other hand, the central magnetic field of a HTS magnet increases when an air gap is provided. The properties of the HTS insert/outsert magnet having an air gap between the pancake windings are examined in this paper. YBCO wire and BSCCO wire were used in the insert and the outsert magnets, respectively. An relation and the evolution strategy were adopted to calculate the optimum critical currents of both magnets. The calculation results showed that there was an optimum air gap which maximized the central magnetic field. The optimum air gap was dependent on the specifications of the HTS magnet.

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Design of a 30 T Superconducting Magnet Using a Coated Conductor Insert

Cited by 15 publications

References 11 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

Low-magnetic-field dependence and anisotropy of the critical current density in coated conductors

The Optimal Air Gap Between the Pancake Windings in a HTS Magnet Consisting of Insert and Outsert Magnet

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