APC Nb3Sn superconductors based on internal oxidation of Nb–Ta–Hf alloys

Xu, X.; Peng, X.; Wan, F.; Rochester, J.; Bradford, G.; Jaroszynski, J.; Sumption, M.

doi:10.1088/1361-6668/acb17a

Title: APC Nb₃Sn superconductors based on internal oxidation of Nb–Ta–Hf alloys

Abstract

In the last few years, a new type of Nb₃Sn superconducting composite, containing a high density of artificial pinning centers (APC) generated via an internal oxidation approach, has demonstrated a significantly superior performance relative to present, state-of-the-art commercial Nb3Sn conductors. This was achieved via the internal oxidation of Nb-4at.%Ta-1at.%Zr alloy. On the other hand, our recent studies have shown that internal oxidation of Nb–Ta–Hf alloys can also lead to dramatic improvements in Nb₃Sn performance. Here in this work we follow up on this latter approach, fabricating a 61-stack APC wire based on the internal oxidation of Nb-4at.%Ta-1at.%Hf alloy, and compare its critical current density (J_c) and irreversibility field with APC wires made using Nb-4at.%Ta-1at.%Zr. A second goal of this work was to improve the filamentary design of APC wires in order to improve their wire quality and electromagnetic stability. Our new modifications have led to significantly improved residual resistivity ratio and stability in the conductors, while still keeping non-Cu J_c at or above the conductor J_c specification required by the proposed Future Circular Collider. Further improvement via optimization of the wire recipe and design is ongoing. Finally, additional work needed to make APC conductors ready for applications in magnets ismore » discussed.« less

Authors:

^[1]; Peng, X. ^[2];

^[1]; Rochester, J. ^[3]; Bradford, G. ^[4];

^[4];

^[3]

Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Hyper Tech Research Incorporated, Columbus, OH (United States)
The Ohio State University, Columbus, OH (United States)
Florida State University, Tallahassee, FL (United States). National High Magnetic Field Laboratory (MagLab)

Publication Date:: Tue Feb 07 00:00:00 EST 2023

Research Org.:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)

OSTI Identifier:: 1908200

Report Number(s):: FERMILAB-PUB-22-576-TD; arXiv:2301.02571
Journal ID: ISSN 0953-2048; oai:inspirehep.net:2621312

Grant/Contract Number:: AC02-07CH11359; SC0017755; DMR-1644779

Resource Type:: Accepted Manuscript

Journal Name:: Superconductor Science and Technology

Additional Journal Information:: Journal Volume: 36; Journal Issue: 3; Journal ID: ISSN 0953-2048

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; Nb3Sn superconductor; artificial pinning center; internal oxidation; Nb-Ta-Hf; Jc

Citation Formats


                    Xu, X., Peng, X., Wan, F., Rochester, J., Bradford, G., Jaroszynski, J., and Sumption, M. APC Nb3Sn superconductors based on internal oxidation of Nb–Ta–Hf alloys.  United States: N. p., 2023. 
Web.  doi:10.1088/1361-6668/acb17a.

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                    Xu, X., Peng, X., Wan, F., Rochester, J., Bradford, G., Jaroszynski, J., & Sumption, M. APC Nb3Sn superconductors based on internal oxidation of Nb–Ta–Hf alloys.  United States.  https://doi.org/10.1088/1361-6668/acb17a

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                    Xu, X., Peng, X., Wan, F., Rochester, J., Bradford, G., Jaroszynski, J., and Sumption, M. Tue .  
"APC Nb3Sn superconductors based on internal oxidation of Nb–Ta–Hf alloys".  United States.  https://doi.org/10.1088/1361-6668/acb17a.  https://www.osti.gov/servlets/purl/1908200.

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@article{osti_1908200,

  title        = {APC Nb3Sn superconductors based on internal oxidation of Nb–Ta–Hf alloys},

  author       = {Xu, X. and Peng, X. and Wan, F. and Rochester, J. and Bradford, G. and Jaroszynski, J. and Sumption, M.},

  abstractNote = {In the last few years, a new type of Nb3Sn superconducting composite, containing a high density of artificial pinning centers (APC) generated via an internal oxidation approach, has demonstrated a significantly superior performance relative to present, state-of-the-art commercial Nb3Sn conductors. This was achieved via the internal oxidation of Nb-4at.%Ta-1at.%Zr alloy. On the other hand, our recent studies have shown that internal oxidation of Nb–Ta–Hf alloys can also lead to dramatic improvements in Nb3Sn performance. Here in this work we follow up on this latter approach, fabricating a 61-stack APC wire based on the internal oxidation of Nb-4at.%Ta-1at.%Hf alloy, and compare its critical current density (Jc) and irreversibility field with APC wires made using Nb-4at.%Ta-1at.%Zr. A second goal of this work was to improve the filamentary design of APC wires in order to improve their wire quality and electromagnetic stability. Our new modifications have led to significantly improved residual resistivity ratio and stability in the conductors, while still keeping non-Cu Jc at or above the conductor Jc specification required by the proposed Future Circular Collider. Further improvement via optimization of the wire recipe and design is ongoing. Finally, additional work needed to make APC conductors ready for applications in magnets is discussed.},

  doi          = {10.1088/1361-6668/acb17a},

  journal      = {Superconductor Science and Technology},

  number       = 3,

  volume       = 36,

  place        = {United States},

  year         = {Tue Feb 07 00:00:00 EST 2023},

  month        = {Tue Feb 07 00:00:00 EST 2023}

}

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Title: APC Nb3Sn superconductors based on internal oxidation of Nb–Ta–Hf alloys

Abstract

Citation Formats

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Title: APC Nb₃Sn superconductors based on internal oxidation of Nb–Ta–Hf alloys

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Optimizing <formula formulatype="inline"><tex Notation="TeX">$\hbox{Nb}_{3}\hbox{Sn}$</tex></formula> Conductors for High Field Applications
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A review and prospects for Nb ₃ Sn superconductor development
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FCC-hh: The Hadron Collider: Future Circular Collider Conceptual Design Report Volume 3
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Targets for R&D on Nb ₃ Sn Conductor for High Energy Physics
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Conductor Specification and Validation for High-Luminosity LHC Quadrupole Magnets
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High critical current density in internally-oxidized Nb3Sn superconductors and its origin
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Results on mono element internal tin Nb₃Sn conductors (MEIT) with Nb7.5Ta and Nb(1Zr+O_x) filaments
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Refinement of Nb ₃ Sn grain size by the generation of ZrO ₂ precipitates in Nb ₃ Sn wires
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Flux pinning mechanisms in type II superconductors
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