Status and perspective of the Nb3Al development

Takeuchi, T.; Kikuchi, A.; Banno, N.; Kitaguchi, Hitoshi; Iijima, Y.; Tagawa, K.; Nakagawa, Kazuma; Tsuchiya, K.; Mitsuda, C.; Koizumi, N.; Okuno, K.

doi:10.1016/j.cryogenics.2008.04.007

Cited by 70 publications

(36 citation statements)

References 31 publications

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“…The RHQ-Nb 3 Al conductor is very promising for high-field applications such as particle accelerator, fusion reactor, and NMR. Development of the RHQ-Nb 3 Al wires has been reported by Takeuchi et al [1][2][3][4][5]. The critical current I c of A15-type superconducting wires such as Nb 3 Al and Nb 3 Sn dependent on the tensile strain.…”

Section: Introductionmentioning

confidence: 99%

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Residual strain dependence on the matrix structure in RHQ-Nb₃Al wires by neutron diffraction measurement

Jin

Nakamoto

Ito

et al. 2012

Supercond. Sci. Technol.

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We prepared three types of non-Cu RHQ-Nb3Al wire samples with different matrix structures: an all-Ta matrix, a composite matrix of Nb and Ta with a Ta inter filament, and an all-Nb matrix. Neutron diffraction patterns of the wire samples were measured at room temperature in J-PARC "TAKUMI." To obtain residual strains of materials, we estimated lattice constant a by multi-peak analysis in the wire. Powder sample of each wire was measured, where the powder was considered to be strain-free. The grain size of all the powder samples was below 0.02 mm. For wire sample with the all-Nb matrix, we also obtained lattice spacing d by a single-peak analysis. Residual strains of Nb3Al filament were estimated from the two analysis results and were compared. Result, residual strains obtained from the multi-peak analysis showed a good accuracy with small standard deviation. The multi-peak analysis results for the residual strains of Nb3Al filament in the three samples were all tensile residual strain in the axial direction, they are 0.12%, 0.12%, and 0.05% for the all-Ta matrix, the composite matrix, and the all-Nb matrix, respectively. Difference in the residual strain of Nb3Al filament between the composite and all-Nb matrix samples indicates that type of inter-filament materials show a great effect on the residual strain. In this paper, we report the method of measurement, method of analysis, and results for residual strain in the tree types of non-Cu RHO-Nb3Al wires.

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Section: Introductionmentioning

confidence: 99%

“…Firstly, a mono filament was prepared by the jelly-roll method [2]. Nb and Al sheets with a stoichiometric composition were rolled onto a pure Nb or a pure Ta core.…”

Section: Sample Preparationmentioning

confidence: 99%

Residual strain dependence on the matrix structure in RHQ-Nb₃Al wires by neutron diffraction measurement

Jin

Nakamoto

Ito

et al. 2012

Supercond. Sci. Technol.

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“…Therefore it greatly influences the J c and T c properties of the wires. Various studies have reported on this effect for different kinds of wires [1,4,5]. Here, we investigated the effect of the RHQ current on the curve of the magnetic moment m(T) of the ME476 wires.…”

Section: Effect Of Rhq Current On M(t) Curvementioning

confidence: 99%

“…Rapid heating/quenching and transformation (RHQT)-processed Nb 3 Al wires [1] possess better strain tolerance [2,3] than Nb 3 Sn wires and exhibit similar high-field properties. Therefore, they might be promising candidates for use in future high-field accelerator magnets.…”

Section: Introductionmentioning

confidence: 99%

Magnetization studies of RHQT-processed Nb₃Al wires for high-field accelerator magnet applications

Tsuchiya

Nimori

Takeuchi

et al. 2010

J. Phys.: Conf. Ser.

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“…The development is centered in Japan at the National Institute for Materials Science (NIMS) where the focus is on use of the rapid heating and quenching (RHQ) process 2,3) . The main issues are processing for optimal J c and application of stabilizer.…”

Section: Nb 3 Almentioning

confidence: 99%

Challenges and Prospects for the Large Scale Application of Superconductivity in High Energy Physics and Fusion Programs

Gourlay

2007

TEION KOGAKU

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Synopsis:The large scale use of superconductivity continues to be dominated by applications for which there is generally no conventional option. In these cases, superconductivity has enabled new science and technology that could not exist without it. Thanks to persistent ongoing research, new ancillary technology and the development of new materials, the field is far from exhausted. The fields of fusion energy and high energy physics (HEP) have particularly benefited from the application of superconductivity. High magnetic fields are absolutely necessary to achieve the required performance parameters. Even though superconductivity is an enabling technology for these fields, it comes with a number of challenges. The progress in development of applications is driven from one side by the available materials and on the other, by the evolution, or sometimes revolution, in ancillary technologies. Technology for use in both fusion and accelerator magnets begins with the same materials and inherent constraints, yet results in substantially different configurations and unique challenges due to the operational requirements for the respective applications. This paper presents a comparison of the technology developed by the fusion and high energy physics programs, both the similarities and the differences, and prospects for future development.

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Status and perspective of the Nb3Al development

Cited by 70 publications

References 31 publications

Residual strain dependence on the matrix structure in RHQ-Nb₃Al wires by neutron diffraction measurement

Residual strain dependence on the matrix structure in RHQ-Nb₃Al wires by neutron diffraction measurement

Magnetization studies of RHQT-processed Nb₃Al wires for high-field accelerator magnet applications

Challenges and Prospects for the Large Scale Application of Superconductivity in High Energy Physics and Fusion Programs

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Status and perspective of the Nb3Al development

Cited by 70 publications

References 31 publications

Residual strain dependence on the matrix structure in RHQ-Nb3Al wires by neutron diffraction measurement

Residual strain dependence on the matrix structure in RHQ-Nb3Al wires by neutron diffraction measurement

Magnetization studies of RHQT-processed Nb3Al wires for high-field accelerator magnet applications

Challenges and Prospects for the Large Scale Application of Superconductivity in High Energy Physics and Fusion Programs

Contact Info

Product

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Residual strain dependence on the matrix structure in RHQ-Nb₃Al wires by neutron diffraction measurement

Residual strain dependence on the matrix structure in RHQ-Nb₃Al wires by neutron diffraction measurement

Magnetization studies of RHQT-processed Nb₃Al wires for high-field accelerator magnet applications