Nb3Sn Conductor Development for Fusion and Particle Accelerator Applications

Parrell, J.A.; Field, M.B.; Zhang, Y.; Hong, Suk-Ho

doi:10.1063/1.1774590

Cited by 77 publications

(24 citation statements)

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“…The magnetic field was swept from 0 to 16 T, and then back to 0 T again. We used fixed temperatures of 4, 4.5, 5,6,7,8,9,10,11,12,14,16,18,20,25,30,35, 40 and 76 K. Measurements at 4, 4.5, and 5 K were done in liquid helium and those at 76 K were done in liquid nitrogen. Our re-entrant Dewar can be filled with a liquid cryogen, pressurized, and heated to change the temperature of the cryogen.…”

Section: Magnetoresistance Of Resistive Thermometersmentioning

confidence: 99%

“…Figure 22 is such a plot for a re-stacked-rod process (RRP ® ) Nb 3 Sn wire that was doped with Ta [11]. The plot shows shifted unloaded residuals versus intrinsic strain for two samples of this wire, with three voltage taps on each sample.…”

Section: Also Of Note Inmentioning

confidence: 99%

“…The latest high-performance Nb 3 Sn wires are being designed with higher current densities, larger effective filament diameter, less Cu stabilizer, and, in some cases, larger wire diameters than ever before [11][12]. In addition, some of the conductor designs and heat treatments cause the residual resistivity ratio (RRR, ratio of room temperature resistivity to the resistivity at 20 K) of the stabilizer to be less than 20.…”

Section: Introductionmentioning

confidence: 99%

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Final Technical Report

Goodrich¹

2011

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Section: Magnetoresistance Of Resistive Thermometersmentioning

confidence: 99%

Section: Also Of Note Inmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Final Technical Report

Goodrich¹

2011

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“…Two wires of the Restacked Rod Process (RRP) type produced by Oxford Superconducting Technology [6] (Ta alloyed, billet #7419, and Ti alloyed, billet #11976) and one of the Powder-in-Tube (PIT) type produced by Bruker-EAS [7] (Ta alloyed, billet #0904) have been used for proton irradiation studies. The cross sections of the Ti-alloyed RRP wire and the PIT wire are shown in Fig.1.…”

Section: The Samplesmentioning

confidence: 99%

Radioactivity of $\hbox{Nb}_{3}\hbox{Sn/Cu}$ Wires After Proton Irradiation

Otto

Scheuerlein

Catherall

et al. 2013

IEEE Trans. Appl. Supercond.

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Superconducting magnets based on Nb3Sn technology are being developed for the LHC high luminosity upgrade. In this context irradiation induced changes of the superconducting properties of state-of-the-art Ti and Ta doped Nb3Sn wires are presently studied. During irradiation tests with protons of 65 MeV at the cyclotron of Université Catholique de Louvain (UCL), 1.4 GeV at the CERN ISOLDE facility, and 24 GeV at the CERN IRRAD1 facility, the superconductor samples become radioactive and their handling must follow the legal specifications for radioactive materials. We have estimated the activation and the resulting ambient dose equivalent rate up to a fluence of 1017 p/cm2 with the Monte-Carlo Code FLUKA. The estimates were verified with experimental activation spectra. Samples for magnetization measurements with a mass of approximately 20 mg have to be considered as radioactive, but they do not have the potential to harm the operators handling them at radiation levels below 1 µSv/h. Larger samples (longer wires and sample holder materials like Cu and TiAl6V4) show correspondingly higher ambient dose equivalent rates and activation levels and they must be handled by radiation workers in designated areas, taking into account the standard precautions for work with radioactive materials. The use of radiation shielding during handling is recommended. This article has been accepted for publication in a future issue of this journal, but has not been fully edited. Content may change prior to final publication. Samples for magnetization measurements with a mass of approximately 20 mg have to be considered as radioactive, but they do not have the potential to harm the operators handling them at radiation levels below 1 Sv/h. Larger samples (longer wires and sample holder materials like Cu and TiAl6V4) show correspondingly higher ambient dose equivalent rates and activation levels and they must be handled by radiation workers in designated areas, taking into account the standard precautions for work with radioactive materials. The use of radiation shielding during handling is recommended. 3MPC-02

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“…An example of the current status of conductor for high field accelerator magnet applications is illustrated by the conductor specification adopted by the US LHC Accelerator Research Program (LARP) 20) , shown in Table 1. 21) and I s , is the "stability current" determined at low fields by sweeping the field at constant current. This establishes the current at which the strand is stable against flux-jump instabilities and is defined to be greater than 1000 A @ 4.2 K. The goal of the specification is to obtain strand of uniform properties, moderate critical current density and filament size to support magnet development.…”

Section: Conductor For Accelerator Magnetsmentioning

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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Nb3Sn Conductor Development for Fusion and Particle Accelerator Applications

Cited by 77 publications

References 0 publications

Final Technical Report

Final Technical Report

Radioactivity of $\hbox{Nb}_{3}\hbox{Sn/Cu}$ Wires After Proton Irradiation

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

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