Bi-2212 Canted-Cosine-Theta Coils for High-Field Accelerator Magnets

Godeke, A.; Brouwer, Lucas; Caspi, S.; Dietderich, D.R.; Gourlay, S.A.; Hafalia, R.; Heys, N. I.; Higley, H.; Lipton, Thomas; Reynolds, M. A.; Swanson, J.

doi:10.1109/tasc.2014.2369955

Cited by 29 publications

(23 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Second, the current density follows a natural cos θ distribution and thus the design promises excellent geometric field quality. The CCT design is also being pursued for Bi-2212 HTS dipole insert magnets [42,43], high-field Nb 3 Sn accelerator magnets [44,45], a gantry magnet for proton therapy [46], and NbTi corrector magnets for the High-Luminosity LHC [47]. The C1 magnet has two layers with a clear aperture of 70 mm to allow for an anticryostat for field quality measurements (figure 1).…”

Section: Magnet Designmentioning

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.

View full text Add to dashboard Cite

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.

show abstract

Section: Magnet Designmentioning

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.

View full text Add to dashboard Cite

show abstract

“…Studies are on-going for cosϑ lay-out [42], or normal coil block lay-out [41], with a special care for understanding current sharing and actual critical surface of coils which are dominated by highly anisotropic tapes [39]. Additionally, we are following closely the evolution of Canted Cosine Theta (CCT) design with Bi-2212 [43], [44] and we may think to optimize it for use of Roebel, or engaging in Bi-2212 either with CCT or standard Cosϑ. Stacked cable with cable twist at each turn end have been also considered [45], although at this stage with little priority.…”

Section: B Magnets (Task 103): Targets and Resultsmentioning

confidence: 99%

The EuCARD-2 Future Magnets European Collaboration for Accelerator-Quality HTS Magnets

Rossi

Badel

Bajko

et al. 2015

IEEE Trans. Appl. Supercond.

114

View full text Add to dashboard Cite

Abstract-EuCARD-2 is a project supported by FP7-European Commission that includes, inter alia, a work-package (WP10) called "Future Magnets". This project is part of the long term development that CERN is launching to explore magnet technology at 16 T to 20 T dipole operating field, within the scope of a study on Future Circular Colliders. The EuCARD2 collaboration is closely liaising with similar programs for high field accelerator magnets in the USA and Japan. The main focus of EuCARD2 WP10 is the development of a 10 kA-class superconducting, high current density cable suitable for accelerator magnets, The cable will be used to wind a stand-alone magnet 500 mm long and with an aperture of 40 mm. This magnet should yield 5 T, when stand-alone, and will enable to reach a 15 to 18 T dipole field by placing it in a large bore background dipole of 12-15 T. REBCO based Roebel cables is the baseline. Various magnet configurations with HTS tapes are under investigation and also use of Bi-2212 round wire based cables is considered. The paper presents the structure of the collaboration and describes the main choices made in the first year of the program, which has a breadth of five to six years of which four are covered by the FP7 frame.

show abstract

“…This is possible by minimizing the thickness of the ribs at the mid-plane, where the ribs are thinnest. There is a limit though for the minimum rib thickness (0.25 mm) that can be machined in aluminum-bronze mandrels, which is the material selected for Bi-2212 CCT coils [7].…”

Section: Bi-2212 Cct Magnet In Stand-alone Configurationmentioning

confidence: 99%

Designs and Prospects of Bi-2212 Canted-Cosine-Theta Magnets to Increase the Magnetic Field of Accelerator Dipoles Beyond 15 T

Fajardo

Brouwer

Caspi

et al. 2018

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

Abstract-The critical current density of Bi-2212 round wires has seen significant improvement over the past two years. We present the magnetic design and stress analysis of two Bi-2212 dipoles based on Canted-Cosine-Theta (CCT) technology using the state-of-the-art wires. The first design, based on a 19-strand Rutherford cable of ∅0.8 mm strands, is a two-layer dipole with a bore diameter of 40 mm and an outer diameter of 98.4 mm; it generates 5.4 T when operating in stand-alone configuration and 18.9 T in 15 T background field. The second design, based on a 13-strand Rutherford cable of ∅0.8 mm strands, is also a two-layer dipole with a bore diameter of 40 mm and an outer diameter of 81 mm; it generates 4.0 T when operating in stand-alone configuration and 17.8 T in 15 T background field. Normal stresses on the conductor in these magnets do not exceed 35 MPa when working under background field. Moreover, we propose a novel approach for increasing the efficiency of CCT magnets using keystoned Rutherford cable while removing the midplane ribs. With this method, it is possible to increase the efficiency of small radius CCT coils by 20%. We conclude that Bi-2212 can be used to increase the limit of accelerator magnet dipole fields beyond 15 T while managing stresses in the coils to acceptable levels.Index Terms-Bi-2212 dipole, canted cosine theta, HTS insert magnets.

show abstract

Bi-2212 Canted-Cosine-Theta Coils for High-Field Accelerator Magnets

Cited by 29 publications

References 13 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

The EuCARD-2 Future Magnets European Collaboration for Accelerator-Quality HTS Magnets

Designs and Prospects of Bi-2212 Canted-Cosine-Theta Magnets to Increase the Magnetic Field of Accelerator Dipoles Beyond 15 T

Contact Info

Product

Resources

About

Bi-2212 Canted-Cosine-Theta Coils for High-Field Accelerator Magnets

Cited by 29 publications

References 13 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

The EuCARD-2 Future Magnets European Collaboration for Accelerator-Quality HTS Magnets

Designs and Prospects of Bi-2212 Canted-Cosine-Theta Magnets to Increase the Magnetic Field of Accelerator Dipoles Beyond 15 T

Contact Info

Product

Resources

About

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