The EuCARD2 Future Magnets Program for Particle Accelerator High-Field Dipoles: Review of Results and Next Steps

Rossi, L.; Badel, Arnaud; Bajas, Hugues; Bajko, M.; Ballarino, A.; Barth, C.; Betz, U.; Bottura, L.; Broggi, F.; Chiuchiolo, A.; Dhallé, M.; Durante, M.; Fazilleau, Philippe; Fleiter, J.; Gao, Peng; Goldacker, W.; Kario, A.; Kirby, G.; Haro, E.; Himbele, John; Lorin, C.; Murtomäki, Jaakko Samuel; Nugteren, J. van; Petrone, Carlo; Rijk, G. de; Ruuskanen, Janne; Senatore, Carmine; Statera, M.; Stenvall, Antti; Tixador, Pascal; Yang, Y.; Usoskin, A.; Zangenberg, N.

doi:10.1109/tasc.2017.2784357

Cited by 43 publications

(23 citation statements)

References 39 publications

(48 reference statements)

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“…Actually, since the heating and voltage increase are very reproducible, one may think to run the magnet in a voltage mode rather than in current mode (to reach maximum current). A full analysis of the test results is reported in [85,86]. The main points are:…”

Section: Results Of Ab Dipoles: First Two Featherm2 Magnetsmentioning

confidence: 99%

HTS Accelerator Magnets and Conductor development in Europe

Rossi¹,

Senatore²

2020

Preprint

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In view of the preparation for a post-LHC collider, the high-energy physics (HEP) community started from 2010 to discuss various options, including the use of HTS for very high field dipoles. Therefore, a small program was set in Europe aiming at exploring the possibility of using HTS for accelerator quality magnets. Based on various EU funded programs, though at modest levels, has enabled the European community of accelerator magnets to start getting experience in HTS and addressing a few issues. The program was based on use of REBCO tapes to form 10 kA Roebel cables, to be used to wind small dipoles of 30-40 mm aperture in the 5 T range. The dipoles are designed to be later inserted in a background dipole field (in Nb3Sn), to reach eventually a field level in the 16-20 T range, beyond the reach of LTS. The program is currently underway: more than 1 km tape of high performance (Je &gt; 500 A/mm2 at 20 T, 4.2 K has been manufactured and characterized, various 30 m long Roebel cables have been assembled and validated up to 13 kA, a few dipoles have been wound and tested, reaching at present 4.5 T in stand-alone (while a dipole made from race track coils with no-bore exceeded 5 T using stacked tape cable) and a test in a background field is being organized.

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Section: Results Of Ab Dipoles: First Two Featherm2 Magnetsmentioning

confidence: 99%

HTS Accelerator Magnets and Conductor development in Europe

Rossi¹,

Senatore²

2020

Preprint

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“…CERN has chosen Roebel cables [86] because this design is the most compact (very high filling factor), provides current capacity of the order of tens of kA, and is fully transposed (even if it may not be necessary in HTS cables). The choice of using an anisotropic cable design is particularly meaningful for the block type dipole, because in this combination of cable and magnet, the field will be almost parallel to the wide face of the tape (less than 5° misalignment), resulting in a much higher critical current.…”

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.

177

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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“…The round conductor can simplify the magnet design and winding compared to the conductor based on stacked tapes. Our focus complements the effort on the Roebel cables in Europe [22,73,74].…”

Section: Development Of Rebco Magnet Technology At Lbnlmentioning

confidence: 99%

“…Several programs in the high-energy physics (HEP) community are developing REBCO magnets as a new technology paradigm [4]. The EuCARD series programs, an European collaboration lead by CERN, have been pioneering the development for REBCO accelerator magnets [73,74]. The collaboration successfully demonstrated a record bore field of 5.37 T in racetrack coils with a stack of two tapes at 4.2 K [75,76].…”

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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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The EuCARD2 Future Magnets Program for Particle Accelerator High-Field Dipoles: Review of Results and Next Steps

Cited by 43 publications

References 39 publications

HTS Accelerator Magnets and Conductor development in Europe

HTS Accelerator Magnets and Conductor development in Europe

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

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

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