Recent Progress in Developing Nb3Sn Conductors With Increased Specific Heat

Xu, Xingchen; Peng, Xuan; Wan, Fang; Rochester, Jacob; Sumption, Mike

doi:10.1109/tasc.2023.3252482

Recent Progress in Developing Nb₃Sn Conductors With Increased Specific Heat

Journal Article · Mon Mar 20 00:00:00 EDT 2023 · IEEE Transactions on Applied Superconductivity

DOI:https://doi.org/10.1109/tasc.2023.3252482· OSTI ID:1971790

^[1]; Peng, Xuan ^[2]; Wan, Fang ^[1]; Rochester, Jacob ^[3]; ^[3]

Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Hyper Tech Research, Inc., Columbus, OH (United States)
The Ohio State Univ., Columbus, OH (United States)

A possible approach to reducing Nb₃Sn magnet training is to increase the energy margin of Nb₃Sn conductors by enhancing their specific heat (C_p). For this study, we have been developing Nb₃Sn conductors with increased C_p by incorporating substances with high C_p at 2-10 K based on a conductor design that is compatible with standard Nb₃Sn strand production. In the past couple of years our efforts have been mainly focused on improving strand design (e.g., position of high- C_p filaments, thickness of the Cu tube for the high-C_p filaments, ratio of the Cu powder to the high-C_p substance, filament spacing, etc.) in order to obtain good strand drawability and to reduce degradation after rolling, which is needed for production of Rutherford cables. We also tried a new high-C_p substance, Gd₂O₂S, and verified that it has much higher C_p over the whole magnetic field range than the Gd₂O₃ we used before. With that development work we can now produce high-C_p strands with good drawability and low levels of degradation after rolling. This paper reports our findings and the current status of the development of high-C_p Nb₃Sn conductors.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1971790

Report Number(s):: FERMILAB-CONF-22-907-TD; oai:inspirehep.net:2654023

Journal Information:: IEEE Transactions on Applied Superconductivity, Journal Name: IEEE Transactions on Applied Superconductivity Journal Issue: 5 Vol. 33; ISSN 1051-8223

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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Recent Progress in Developing Nb3Sn Conductors With Increased Specific Heat

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References (23)

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Recent Progress in Developing Nb₃Sn Conductors With Increased Specific Heat