20 T Compact Superconducting Outsert Employing Y123 Coated Conductors for a 45 T Hybrid Magnet

Watanabe, Kazuo; Awaji, Satoshi; Nishijima, G.; Hamajima, T.; Toko, Kiyoshi; Kumakura, Hiroaki; Hanai, S.; Koyanagi, K.; Ono, M.

doi:10.1109/tasc.2009.2018222

Cited by 9 publications

(5 citation statements)

References 9 publications

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“…In particular, the low temperature-high magnetic field operational interval is so important for high energy physics and nuclear fusion applications that it has drawn ever-increasing interest in recent years from both the scientific community and industry. High-field hybrid magnets, which use a very long YBCO tape can achieve impressive magnetic fields of up to 45 T [168].…”

Section: Artificial Pinning Centers In Recbo Thin-film Superconductorsmentioning

confidence: 99%

Nanosized Pinning Centers in the Rare Earth-Barium-Copper-Oxide Thin-Film Superconductors

et al. 2020

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Since the discovery of high-temperature superconductivity, significant progress in the fabrication of REBCO-based (Rare Earth Barium Copper mixed Oxides) thin-films superconductors has been achieved. In our review, we described the approaches and possibilities of the improvement of superconducting properties by the introduction of nanosized pinning centers. We focused on the synthesis and viability of the material for artificial pinning centers and methods used for the introduction of the pinning centers into superconducting REBCO-based thin-films. This article summarizes available materials and procedures regardless of the financial cost of the individual method. According to available literature, the most significant superconducting REBCO tapes can be obtained when a combination of 1D and 0D nanoparticles are used for nanoscale pinning.

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Section: Artificial Pinning Centers In Recbo Thin-film Superconductorsmentioning

confidence: 99%

Nanosized Pinning Centers in the Rare Earth-Barium-Copper-Oxide Thin-Film Superconductors

et al. 2020

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“…A background coil is fabricated using the co-winding technique of CuNb/Nb 3 Sn Rutherford flat cable and stainless steel tape. In the previous report [7], 4+5 strand cable conductors consisting of four CuNb/Nb 3 Sn strands and five stainless steel strands were demonstrated for the magnet design of a 20 T superconducting outsert. However, we supposed that there may be thermal and stress concentration problems due to stainless steel strands.…”

Section: Coil Design Using Rutherford Cablesmentioning

confidence: 99%

Compact 20 T superconducting magnet for a 50 T-class hybrid magnet

Watanabe¹,

Awaji²,

Oguro³

et al. 2012

AIP Conference Proceedings

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The repeated prebending treatment for Nb 3 Sn wires with CuNb reinforcing stabilizer (CuNb/Nb 3 Sn) largely enhances the critical current. Since the employment of the highstrength CuNb/Nb 3 Sn wire is very effective for a react-and-wind process Nb 3 Sn superconducting magnet, we focus on the application of this prebending effect to the reactand-wind process of high-strength strand cables. The Rutherford flat cables composed of sixteen CuNb/Nb 3 Sn strands were fabricated to be applicable to the react-and-wind method. High-strength CuNb/Nb 3 Sn strand cables will exhibit the critical current of I c = 1890 A at 13 T and 4.2 K. In order to construct a compact hybrid magnet, a 20 T-440 mm room temperature bore superconducting magnet consisting of YBCO, CuNb/Nb 3 Sn, and NbTi section coils is designed, using such Rutherford flat cables in pool-boiling liquid helium.

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“…Although the calculated value was 111. 8 (see Table I), the measured value of 114 was used for the conductor thickness. The maximum value of the supplied transport current was 493 A in run #2, which corresponds to the hoop stress of 1322 MPa.…”

Section: B Hoop Stress Testmentioning

confidence: 99%

Hoop Stress Test of $\hbox{GdBa}_{2}\hbox{Cu}_{3}\hbox{O}_{\rm y}$ Coated Conductor

Nishijima

Awaji

Watanabe

et al. 2011

IEEE Trans. Appl. Supercond.

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Mechanical property of GdBa 2 Cu 3 O y (GdBCO) coated conductor was investigated at 4.2 K in a magnetic field by two ways, which are the tensile test and the hoop stress test.The tensile stress/strain dependence of critical current ( c ) of a 2 mm width conductor was explored at 4.2 K, 18 T. The result provided that c -reversible strain limit existed in between 0.43% and 0.46%, corresponding to 907 MPa and 960 MPa in stress, and the elastic constant was 203 GPa. The hoop stress test has been performed at 4.2 K, 11 T. A test coil was fabricated by winding a 5 mm width conductor on a 270 mm diameter GFRP bobbin by 1.5 turns. The maximum value of applied hoop stress, which was deduced from a product of magnetic field, current density and coil radius, was 1322 MPa. Five strain gauges glued on the conductor surface showed almost the same values, which were in a range of 0.64% to 0.67%, indicating the uniform longitudinal deformation. Furthermore, the hoop stress-strain characteristics were linear, suggesting an elastic deformation. The deduced elastic constants were in a range of 196-204 GPa. It was confirmed that the GdBCO coated conductor performance was deteriorated irreversibly by 1322 MPa hoop stress, whereas not by 1302 MPa hoop stress.

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20 T Compact Superconducting Outsert Employing Y123 Coated Conductors for a 45 T Hybrid Magnet

Cited by 9 publications

References 9 publications

Nanosized Pinning Centers in the Rare Earth-Barium-Copper-Oxide Thin-Film Superconductors

Nanosized Pinning Centers in the Rare Earth-Barium-Copper-Oxide Thin-Film Superconductors

Compact 20 T superconducting magnet for a 50 T-class hybrid magnet

Hoop Stress Test of $\hbox{GdBa}_{2}\hbox{Cu}_{3}\hbox{O}_{\rm y}$ Coated Conductor

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