Toward REBCO 20 T+ Dipoles for Accelerators

Nugteren, J. van; Stenvall, Antti; Rijk, G. de; Rossi, L.; Murtomäki, Jaakko Samuel; Kirby, G.

doi:10.1109/tasc.2018.2820177

Cited by 57 publications

(38 citation statements)

References 58 publications

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“…The irreversibility field and transport current of REBCO conductor are not likely the limiting factors to reach a 20 T dipole field at an operating temperature below 20 K ( Table 1). Indeed designs of all-REBCO magnets have been proposed to generate a 100 T dc solenoid field [92] and a 20 T dipole field [67]. We believe the mechanical load on the REBCO conductor, in particular, the stress and strain along and transverse to the longitudinal axis of the conductor, will determine the maximum dipole field one can achieve with REBCO conductors, similar to the case for Nb 3 Sn conductors [131].…”

Section: What Is the Maximum Field A Rebco Dipole Magnet Can Achieve?mentioning

confidence: 94%

“…For instance, a 15-strand impregnated Roebel cable for the CERN REBCO dipole magnet [132] shows no degradation in critical current at 4.2 K for up to 370-440 MPa [37]. This stress level is sufficient for a 20 T block REBCO dipole design [67]. Measurements on commercial CORC R wires, without impregnation, showed an estimated irreversible stress limit between 99 and 241 MPa at 76 K, defined at a 3% I c degradation criterion [60].…”

Section: What Is the Maximum Field A Rebco Dipole Magnet Can Achieve?mentioning

confidence: 95%

“…Tape striation is effective to reduce the magnetization in REBCO tapes [86,173,177,178], although it may increase the conductor cost/performance ratio. Compensation from the magnet aspect is another effective approach that should be explored [67,179,180].…”

Section: What Is the Field Quality Of Rebco Accelerator Magnets?mentioning

confidence: 99%

“…Focusing on the Roebel cables [22,77], the EuCARD2 program demonstrated the record dipole field of 3.1 T at 5.7 K with an aligned-block dipole magnet [78,79]. Designs of hybrid dipole magnets with HTS inserts [80] and stand-alone REBCO dipole magnets were also developed [67].…”

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confidence: 99%

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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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Section: What Is the Maximum Field A Rebco Dipole Magnet Can Achieve?mentioning

confidence: 94%

Section: What Is the Maximum Field A Rebco Dipole Magnet Can Achieve?mentioning

confidence: 95%

Section: What Is the Field Quality Of Rebco Accelerator Magnets?mentioning

confidence: 99%

mentioning

confidence: 99%

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

2019

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“…Quench simulations [92] have shown that, after one strand in the cable becomes normal, the current should redistribute to the remaining tapes at relatively small voltages (few mV), which may be difficult to be detected in the noisy environment of large magnets. Large voltage should appear only when all the tape in the cable cross section are normal, but the temperature would rise very quickly, leaving little time to protect the magnet.…”

Section: Aligned Block Dipole (Cern)mentioning

confidence: 99%

A review of commercial high temperature superconducting materials for large magnets: from wires and tapes to cables and conductors

Uglietti

2019

Supercond. Sci. Technol.

179

123

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High Temperature Superconducting (HTS) materials have the potential to generate magnetic field beyond the level obtainable with Low Temperature Superconducting (LTS). This review reports the past and present R&D on HTS cables and conductors for high field tokamaks, accelerator dipoles and large solenoids. Among the HTS wires and tapes available commercially, coated conductor tapes are the most appealing because of the outstanding critical strength and large improvement margin. Limitations are the weakness against peeling and shearing and the short piece length. The prices for technical superconductors are reviewed because they play an important role in large projects; moreover the perspective of industrial production of HTS wires and tapes is discussed considering the historical development of the LTS wire market. Various designs have been proposed for HTS cables and conductors: some are better suited for soft materials, while others can exploit the anisotropy of coated conductors (by aligning the tape with the field), providing the highest current density. The last decade has seen an increase in the size and complexity of the prototypes; however some peculiar features of HTS, such as high stability margin and high mechanical limits, have not yet been fully incorporated in the designs: for example the transposition requirements for HTS have not yet been studied in detail. Several facts indicate that tapes (even if anisotropic) can be used for manufacturing cables and magnets of any size and have advantages with respect to round wires.

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无绝缘rebco饼型线圈变形引起的特性电阻变化

Noguchi

2024

Acta Mech. Sin.

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Toward REBCO 20 T+ Dipoles for Accelerators

Cited by 57 publications

References 58 publications

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

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

A review of commercial high temperature superconducting materials for large magnets: from wires and tapes to cables and conductors

无绝缘rebco饼型线圈变形引起的特性电阻变化

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