Status of the Nb$_{3}$Sn Canted-Cosine-Theta Dipole Magnet Program at Lawrence Berkeley National Laboratory

Arbelaez, Diego; Bogdanof, Timothy; Brouwer, Lucas; Caspi, S.; Dietderich, D.R.; Fernández, José Luis Rudeiros; Ferracin, P.; Gourlay, S.A.; Hafalia, R.; Krutulis, Mark; Marchevsky, M.; Maruszewski, Maxwell; Myers, C.; Prestemon, S.; Reynolds, M. A.; Shen, Tengming; Swanson, J.; Teyber, Reed; Turqueti, Marcos; Vallone, Giorgio; Wang, Xiaorong

doi:10.1109/tasc.2022.3155505

Cited by 18 publications

(16 citation statements)

References 15 publications

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“…The early focus has been on developing the methods and technology for CCT magnet design, analysis, fabrication, and testing. This early effort has culminated in the test of three two-layer Nb 3 Sn CCT dipoles with 90 mm aperture and a bore field of approximately 10 T at the short sample limit [27]. Each magnet in the series led to improved understanding and methods for CCT technology.…”

Section: Development Plans For Stress-management Methodsmentioning

confidence: 99%

“…The focus of these experiments has been on probing training behavior with different impregnation materials and interface conditions. A complementary effort is going on at LBNL with subscale CCT magnets [27]. The subscale CCT magnets are designed to achieve stress levels that ensure training at a similar load line margin when compared to the previously described two-layer Nb 3 Sn CCT series.…”

Section: Small Scale Testingmentioning

confidence: 99%

See 1 more Smart Citation

A Strategic Approach to Advance Magnet Technology for Next Generation Colliders

Ambrosio¹,

Amm²,

Anerella³

et al. 2022

Preprint

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Section: Development Plans For Stress-management Methodsmentioning

confidence: 99%

Section: Small Scale Testingmentioning

confidence: 99%

A Strategic Approach to Advance Magnet Technology for Next Generation Colliders

Ambrosio¹,

Amm²,

Anerella³

et al. 2022

Preprint

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“…A fully wax-impregnated CCT magnet (with its two layers being impregnated separately) is expected to be tested in the near future. The test results are going to be published soon [30]. Although a 2.4-Tesla non-impregnated NbTi CCT magnet performed well without impregnation [31], conductor-ingroove type magnets (such as CCTs) are typically impregnated.…”

Section: Introductionmentioning

confidence: 99%

Training-free performance of the wax-impregnated SuShi septum magnet

Barna,

Brunner,

Novák

et al. 2024

Supercond. Sci. Technol.

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In the framework of the Future Circular Collider Study a new septum magnet concept, nicknamed ``SuShi'' has been developed, and a prototype was built at Wigner RCP, and tested at the FREIA facility of Uppsala University. The concept uses a canted cosine theta (CCT)-like superconducting magnet and a passive superconducting shield to create a zero-field and high-field region within its aperture. SuShi is the first CCT magnet with both of its winding layers simultaneously impregnated with wax. This paper describes the first powering test of the empty magnet at 4.2 K, without the shield being inserted in its aperture. The performance of the magnet, including the observation of quench-back, estimation of hot-spot temperatures and the fraction of energy dissipated in the formers are presented, and most interestingly the absence of any quench during the entire testing period is reported. Sushi reached its nominal peak field of 3.64 T at 450 A, which corresponds to 76% of the calculated short sample limit along the load line, without training.

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“…ENGTHY training remains an issue for epoxy resin impregnated Nb3Sn accelerator magnets [1]. A high number of training quenches before reaching nominal current is not considered acceptable for large-scale application due to the high cost.…”

Section: Introductionmentioning

confidence: 99%

Training Curves of Nb₃Sn Rutherford Cables With a Wide Range of Impregnation Materials Measured in the BOX Facility

Otten

Kario

Wessel

et al. 2023

IEEE Trans. Appl. Supercond.

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Training of accelerator magnets is a costly and time consuming process. The number of training quenches must therefore be reduced to a minimum. We investigate training of impregnated Nb3Sn Rutherford cable in a small-scale experiment named BOX (BOnding Experiment). The test involves a Rutherford cable impregnated in a meandering channel simulating the environment of a canted-cosine-theta (CCT) coil. The sample is powered using a transformer and the Lorentz force is generated by an externally applied magnetic field. The low material and helium consumption enable the test of a larger number of samples. In this article, we present training of samples impregnated with alumina-filled epoxy resins, a modified resin with paraffin-like mechanical properties, and a new tough resin in development at ETH Zürich. These new data are compared with previous results published earlier. Compared to samples with unfilled epoxy resin, those with alumina-filled epoxy show favorable training properties with higher initial quench currents and fewer training quenches before reaching 80% of the critical current.

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Status of the Nb$_{3}$Sn Canted-Cosine-Theta Dipole Magnet Program at Lawrence Berkeley National Laboratory

Cited by 18 publications

References 15 publications

A Strategic Approach to Advance Magnet Technology for Next Generation Colliders

A Strategic Approach to Advance Magnet Technology for Next Generation Colliders

Training-free performance of the wax-impregnated SuShi septum magnet

Training Curves of Nb₃Sn Rutherford Cables With a Wide Range of Impregnation Materials Measured in the BOX Facility

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Status of the Nb$_{3}$Sn Canted-Cosine-Theta Dipole Magnet Program at Lawrence Berkeley National Laboratory

Cited by 18 publications

References 15 publications

A Strategic Approach to Advance Magnet Technology for Next Generation Colliders

A Strategic Approach to Advance Magnet Technology for Next Generation Colliders

Training-free performance of the wax-impregnated SuShi septum magnet

Training Curves of Nb3Sn Rutherford Cables With a Wide Range of Impregnation Materials Measured in the BOX Facility

Contact Info

Product

Resources

About

Training Curves of Nb₃Sn Rutherford Cables With a Wide Range of Impregnation Materials Measured in the BOX Facility