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

Next-generation particle accelerators, such as the proposed Large Hadron Collider (LHC) energy upgrade (highenergy LHC), will require very-high-field (> 20 T) superconducting magnets. This paper describes the progress toward this goal made to date as a part of a collaborative work between Particl...

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Published inIEEE transactions on applied superconductivity Vol. 25; no. 3; pp. 1 - 4
Main Authors Gupta, Ramesh, Anerella, Michael, Ghosh, Arup, Lalitha, Seetha Lakshmi, Sampson, William, Schmalzle, Jesse, Kolonko, James, Scanlan, Ronald, Weggel, Robert, Willen, Erich, Nakao, Kengo
Format Journal Article
LanguageEnglish
Published IEEE 01.06.2015
Subjects
Coils
Conductors
Dipoles
high temperature
High-temperature superconductors
Magnetic field measurement
Superconducting magnets
Voltage measurement
Windings
Dipoles
high-temperature superconductor (HTS)
high-field magnets
superconducting magnets
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Summary:Next-generation particle accelerators, such as the proposed Large Hadron Collider (LHC) energy upgrade (highenergy LHC), will require very-high-field (> 20 T) superconducting magnets. This paper describes the progress toward this goal made to date as a part of a collaborative work between Particle Beam Lasers, Inc., and Brookhaven National Laboratory. To reduce the cost, high-temperature superconductors (HTSs) are used in a hybrid design with conventional low-temperature superconductors (LTSs) Nb3Sn and NbTi. The focus of this paper is on using a second generation (2G) ReBCO HTS tape in cosine-theta coil geometry. The complex ends of the cosine-theta geometry are particularly challenging for a brittle HTS tape. We report the construction and 77-K test results, one with a 4-mm and another with a 12-mm ReBCO tape, neither showing measurable degradation. This paper also presents the first successful use of Kapton CI on an HTS tape, which offers many advantages. Future plans include the construction and 4-K testing of a full cosine-theta HTS coil (first in a stand-alone mode and then in a hybrid structure with LTS coils) and the modeling and measurements of magnetization. This paper is a part of comprehensive research and development toward eventually building a high-field accelerator-quality dipole magnet.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2014.2364400