Hybrid High-Field Cosine-Theta Accelerator Magnet R&amp;amp;D With Second-Generation HTS

Gupta, R.; Anerella, M.; Ghosh, A.; Lalitha, Seetha Lakshmi; Sampson, W.; Schmalzle, J.; Kolonko, J.; Scanlan, R.M.; Weggel, R.J.; Willen, E.; Nakao, Kengo

doi:10.1109/tasc.2014.2364400

Cited by 36 publications

(17 citation statements)

References 7 publications

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“…Although several model accelerator magnets wound from single REBCO tapes have been demonstrated [14][15][16][17][18], there are only a few reports on the development of magnet technology using high-current REBCO cables. The European EuCARD2 program, a large collaborative effort led by CERN, is focusing on REBCO Roebel cables for accelerator magnets [19,20].…”

Section: Introductionmentioning

confidence: 99%

A 1.2 T canted cosθ dipole magnet using high-temperature superconducting CORC^® wires

Wang

Dietderich

DiMarco

et al. 2019

Supercond. Sci. Technol.

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REBa 2 Cu 3 O x (REBCO, RE = rare earth elements) coated conductors can carry high current in high background fields, in principle enabling dipole magnetic fields beyond 20 T. Although model accelerator magnets wound with single REBCO tapes have been successfully demonstrated, magnet technology based on high-current REBCO cables for high-field accelerator magnet applications has yet to be established. We developed a two-layer canted cos θ dipole magnet with an aperture of 70 mm using 30 m long commercial Conductor on Round Core (CORC R) wires. The 3.1 mm diameter CORC R wire contained 16 commercial REBCO tapes with a 30-µm thick substrate. The magnet was tested at 77 and 4.2 K. It generated a peak dipole field of 1.2 T with 4.8 kA at 4.2 K with neither thermal runaway nor training. Reasonable geometric field quality and strong magnetization-current effects with multipole decay were observed. Our work demonstrated a feasible high-temperature superconducting magnet technology as a first step toward a new accelerator magnet paradigm that will enable high-field inserts for next-generation circular colliders and stand-alone magnets that can operate over a wide temperature range for a broad range of applications.

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Section: Introductionmentioning

confidence: 99%

A 1.2 T canted cosθ dipole magnet using high-temperature superconducting CORC^® wires

Wang

Dietderich

DiMarco

et al. 2019

Supercond. Sci. Technol.

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show abstract

“…Compared to the significant progress in high-field solenoid magnets made with REBCO tapes [4][5][6][7][8][9], the development of REBCO high-field accelerator magnets is less advanced, limited by the use of single tapes [10][11][12][13][14]. Two technical issues can partially explain this.…”

Section: Introductionmentioning

confidence: 99%

A viable dipole magnet concept with REBCO CORC^®wires and further development needs for high-field magnet applications

Wang

Caspi

Dietderich

et al. 2018

Supercond. Sci. Technol.

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REBCO coated conductors maintain high engineering current density above 16 T at 4.2 K. That fact will significantly impact markets of various magnet applications including high-field magnets for high-energy physics and fusion reactors. One of the main challenges for the high-field accelerator magnet is the use of multitape REBCO cables with high engineering current density in magnet development. Several approaches developing high-field accelerator magnets using REBCO cables are demonstrated. In this paper, we introduce an alternative concept based on the canted cos θ (CCT) magnet design using Conductor on Round Core (CORC R) wires that are wound from multiple REBCO tapes with a Cu core. We report the development and test of double-layer three-turn CCT dipole magnets using CORC R wires at 77 K and 4.2 K. The scalability of the CCT design allowed us to effectively develop and demonstrate important magnet technology features such as coil design, winding, joints and testing with minimum conductor lengths. The test results showed that the CCT dipole magnet using CORC R wires was a viable option in developing REBCO accelerator magnet. One of the critical development needs is to increase the engineering current density of the 3.7 mm diameter CORC R wire to 540 A mm −2 at 21 T, 4.2 K and to reduce the bending radius to 15 mm. This would enable a compact REBCO dipole insert magnet to generate a 5 T field in a background field of 16 T at 4.2 K.

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“…Therefore, the first question addresses the design and fabrication of magnets. Although racetrack and cos θ-type magnets using single REBCO tapes have been demonstrated [88,[97][98][99], developing magnets with multi-tape REBCO conductors is in its early stage.…”

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

confidence: 99%

“…In the U.S., the magnet technology development is shifting its foucs from single tapes [87][88][89] to multi-tape cables under the framework of the U.S. Magnet Development Program (USMDP).…”

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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Hybrid High-Field Cosine-Theta Accelerator Magnet R&D With Second-Generation HTS

Cited by 36 publications

References 7 publications

A 1.2 T canted cosθ dipole magnet using high-temperature superconducting CORC^® wires

A 1.2 T canted cosθ dipole magnet using high-temperature superconducting CORC^® wires

A viable dipole magnet concept with REBCO CORC^®wires and further development needs for high-field magnet applications

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

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Hybrid High-Field Cosine-Theta Accelerator Magnet R&amp;D With Second-Generation HTS

Cited by 36 publications

References 7 publications

A 1.2 T canted cosθ dipole magnet using high-temperature superconducting CORC® wires

A 1.2 T canted cosθ dipole magnet using high-temperature superconducting CORC® wires

A viable dipole magnet concept with REBCO CORC®wires and further development needs for high-field magnet applications

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

Contact Info

Product

Resources

About

Hybrid High-Field Cosine-Theta Accelerator Magnet R&D With Second-Generation HTS

A 1.2 T canted cosθ dipole magnet using high-temperature superconducting CORC^® wires

A 1.2 T canted cosθ dipole magnet using high-temperature superconducting CORC^® wires

A viable dipole magnet concept with REBCO CORC^®wires and further development needs for high-field magnet applications