Investigation of Superconducting Properties of ${\rm Nb}_{3}{\rm Sn}$ Strands by Internal Tin Process for ITER

Li, C G; Xiao, Caiqin; Guan, Jun; Sun, Xianbin; Liu, J W; Liu, X H; Feng, Yang; Zhang, P X; Li, J S

doi:10.1109/tasc.2010.2042440

Cited by 11 publications

(8 citation statements)

References 7 publications

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“…Figure 7 shows the distribution of strand suppliers, thereby confirming the international nature of the project. It should be noted that 3 of these suppliers (ChMP in RF [25], KAT in KO [26] and WST [27][28] in CN) are new to the business and have been set up by their government to fulfil the ITER needs, while the five others (BEAS in EU [29], Hitachi [30;32] and Jastec [31][32] in Japan and Luvata [33] and OST [34][35] in the USA) are well established superconducting strand suppliers. One particularity of ITER conductor manufacture is that it requires dedicated 800-1000 m long jacketing lines where to store the welded jacket assemblies and to carry out cable insertion prior to compaction and spooling.…”

Section: Iter Conductorsmentioning

confidence: 99%

Challenges and status of ITER conductor production

Devred

Backbier

Bessette

et al. 2014

Supercond. Sci. Technol.

170

118

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Taking the relay of the Large Hadron Collider (LHC) at CERN, ITER has become the largest project in applied superconductivity. In addition to its technical complexity, ITER is also a management challenge as it relies on an unprecedented collaboration of 7 partners, representing more than half of the world population, who provide 90% of the components as in-kind contributions. The ITER magnet system has a stored energy of 51 GJ and involves 6 of the ITER partners. The coils are wound from Cable-In-Conduit Conductors (CICCs) made up of superconducting and copper strands assembled into a fully transposed, rope-type cable, inserted into a conduit of butt-welded austenitic steel tubes. The conductors for the Toroidal Field (TF) and Central Solenoid (CS) coils require about 500 tons of Nb 3 Sn strands while the Poloidal Field (PF) and Correction Coil (CC) and busbar conductors need around 250 tons of Nb-Ti strands. The required amount of Nb 3 Sn strands far exceeds pre-existing industrial capacity and has called for a significant worldwide production scale up. The TF conductors are the first ITER components to be mass produced and are more than 50% complete. During its life time, the CS coil will have to sustain several tens of thousands of electromagnetic (EM) cycles to high current and field conditions, way beyond anything a large Nb 3 Sn coil has ever experienced. Following a comprehensive R&D program, a technical solution has been found for the CS conductor, which ensures stable performance versus EM and thermal cycling. Productions of PF, CC and busbar conductors are also underway. After an introduction to the ITER project and magnet system, we describe the ITER conductor procurements and the Quality Assurance/Quality Control programs that have been implemented to ensure production uniformity across numerous suppliers. Then, we provide examples of technical challenges that have been encountered and we present a status of ITER conductor production worldwide.

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Section: Iter Conductorsmentioning

confidence: 99%

Challenges and status of ITER conductor production

Devred

Backbier

Bessette

et al. 2014

Supercond. Sci. Technol.

170

118

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“…This WST Nb 3 Sn conductor was manufactured with an internal-tin process (Li et al 2010). It is a moderate-J c strand, 0.82 mm in diameter, and designed for the ITER TF magnets, billet #01CW0014A01.…”

Section: Wire Characteristicsmentioning

confidence: 99%

Unified Scaling Law for flux pinning in practical superconductors: II. Parameter testing, scaling constants, and the Extrapolative Scaling Expression

Ekin

Richter

Goodrich

et al. 2016

Supercond. Sci. Technol.

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A general scaling relation for the critical current density in Nb3Sn A Godeke, B ten Haken, H H J ten Kate et al. Influence of the heat-treatment conditions, microchemistry, and microstructure on the irreversible strain limit of a selection of Ti-doped internal-tin Nb3Sn ITER wires N Cheggour, P J Lee, L F Goodrich et al. Inconsistencies between extrapolated and actual critical fields in Nb3Sn wires as demonstrated by direct measurements of Hc2, H* and Tc A Godeke, M C Jewell, A A Golubov et al.

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“…Therefore, the application of superconducting material is essential in those fields. Nb3Sn and NbTi alloy are the most widely used in reality and Nb3Sn is mentioned as it is a kind of superconducting material with A15 [2] crystal structure with critical temperature of 18.1K [3], which is already been used in the superconducting magnets for the ITER fusion reactor [3] as high field of Toroidal Field (TF) coils [4] due to its high critical magnetic field, high resistance to magnetic field and good electromagnetic properties.…”

Section: Introductionmentioning

confidence: 99%

The Manufacture and Performance of Low Temperature Superconductors

Han

2022

J. Phys.: Conf. Ser.

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The application of Nb3Sn superconductor joints is an important part in the production of ITER, MRI and so on. This paper first introduced the application, like coil of MRI, and basic information including the micro crystal structure of Nb3Sn superconductor, which includes the theoretical critical temperature of 18.1K, even mostly, experiments take place under 4.2K, which is the boiling point of liquid helium. Second, it talked a little about the production of CICC joints in industry. Then, mainly introduced the testing device, material parameters and testing procedures of resistance testing of Nb3Sn joints. Concluded all the data from several tests and summarized it. At last, it displayed some of its mechanical property especially about its brittle property and discussed some details in manufacture. Finally conclude about them all.

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Investigation of Superconducting Properties of ${\rm Nb}_{3}{\rm Sn}$ Strands by Internal Tin Process for ITER

Cited by 11 publications

References 7 publications

Challenges and status of ITER conductor production

Challenges and status of ITER conductor production

Unified Scaling Law for flux pinning in practical superconductors: II. Parameter testing, scaling constants, and the Extrapolative Scaling Expression

The Manufacture and Performance of Low Temperature Superconductors

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