Heat Treatment Optimization Studies on PIT ${\rm Nb}_{3}{\rm Sn}$ Strand for the NED Project

Boutboul, T.; Oberli, L.; Ouden, A. den; Pedrini, Danilo; Seeber, B.; Volpini, G.

doi:10.1109/tasc.2009.2019017

Cited by 33 publications

(36 citation statements)

References 4 publications

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“…However, it can be seen from the behavior of B c2 vs. T in Fig. 18 that [20]. A substantial improvement of this value in Nb 3 Sn wires would constitute a real challenge.…”

Section: High Field Rangementioning

confidence: 94%

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Overview of Superconductivity and Challenges in Applications

Flükiger

2012

Rev. Accl. Sci. Tech.

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Considerable progress has been achieved during the last few decades in the various fields of applied superconductivity, while the related low temperature technology has reached a high level. Magnetic resonance imaging (MRI) and nuclear magnetic resonance (NMR) are so far the most successful applications, with tens of thousands of units worldwide, but high potential can also be recognized in the energy sector, with high energy cables, transformers, motors, generators for wind turbines, fault current limiters and devices for magnetic energy storage. A large number of magnet and cable prototypes have been constructed, showing in all cases high reliability. Large projects involving the construction of magnets, solenoids as well as dipoles and quadrupoles are described in the present book. A very large project, the LHC, is currently in operation, demonstrating that superconductivity is a reliable technology, even in a device of unprecedented high complexity. A project of similar complexity is ITER, a fusion device that is presently under construction. This article starts with a brief historical introduction to superconductivity as a phenomenon, and some fundamental properties necessary for the understanding of the technical behavior of superconductors are described.The introduction of superconductivity in the industrial cycle faces many challenges, first for the properties of the baseelements, e.g. the wires, tapes and thin films, then for the various applied devices, where a number of new difficulties had to be resolved. A variety of industrial applications in energy, medicine and communications are briefly presented, showing how superconductivity is now entering the market.

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“…However, it can be seen from the behavior of B c2 vs. T in Fig. 18 that [20]. A substantial improvement of this value in Nb 3 Sn wires would constitute a real challenge.…”

Section: High Field Rangementioning

confidence: 94%

“…For higher fields, e.g. 15 T as envisaged for the quadrupoles in the high luminosity LHC upgrade, the only available round wire material is Nb 3 Sn, which has fulfilled the condition of noncopper J c values of 1500 A/mm 2 at 15 T [20]. Another hypothetical candidate material for round wires is Bi-2212.…”

Section: Wires For Accelerator Magnetsmentioning

confidence: 99%

Overview of Superconductivity and Challenges in Applications

Flükiger

2012

Rev. Accl. Sci. Tech.

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show abstract

“…Cross sections of the Restacked Rod Process (RRP ® ) strand [5] produced by Oxford Superconducting Technology, the Powder-in-Tube (PIT) strand [6] produced by Shape Metal Innovation (now part of Bruker EAS) and the Tube Type strand [7] from Hyper Tech Research are presented in figure 1. The nominal diameter of the PIT B215 strand is 1.25 mm.…”

Section: Methodsmentioning

confidence: 99%

Phase transformations during the reaction heat treatment of Nb₃Sn superconductors

Scheuerlein

Michiel

Thilly

et al. 2010

J. Phys.: Conf. Ser.

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“…The NED wire R&D culminated in the best performance PIT 1.25 mm strand that achieved a critical current density of 1500 A/mm 2 at 15 T and 4.2 K, corresponding to 2700 A/mm 2 at 12 T and 4.2 K. This was achieved at a moderate reaction temperature (625 °C) that maximizes the final fraction of fine-grained Nb 3 Sn in the initial Nb tube. This wire has a geometric filament diameter of 50 m, and an RRR of 200 [20]. The spectacular increase of J C achieved over the past 10 years is a great success, but has also brought a number of riddles.…”

Section: Superconductor Developmentmentioning

confidence: 99%