TY - JOUR
T1 - Development of a High Current Density Distributed Tin Method Nb3Sn Wire
AU - Kawashima, Shinya
AU - Kawarada, Takao
AU - Kato, Hiroyuki
AU - Murakami, Yukinobu
AU - Sugano, Michinaka
AU - Oguro, Hidetoshi
AU - Awaji, Satoshi
N1 - Funding Information:
Manuscript received October 24, 2018; revised April 11, 2019; accepted April 11, 2019. Date of publication May 13, 2019; date of current version July 19, 2019. This work was supported in part by the European Organization for Nuclear Research (CERN) and High Energy Research Organization (KEK) under Contract ICA-JP-0103 (Appendix 19 to the Agreement on Collaborative Work between CERN and KEK) and in part by the High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University, under Project 18H0033. This paper was recommended by Editor P. J. Lee. (Corresponding author: Shinya Kawashima.) S. Kawashima and T. Kawarada are with Kobe Steel Ltd., Kobe, 651-2271, Japan (e-mail: kawashima.shinya@kobelco.com).
Publisher Copyright:
© 2002-2011 IEEE.
PY - 2020/1
Y1 - 2020/1
N2 - We have developed a high-performance (high-JC) Nb3Sn wire via a distributed tin (DT) method. Non-Cu JC of 1100 A/mm2 at 16 T, 4.2 K has been achieved by improving the Sn diffusion and optimizing the Ti content. With the future circular collider magnet planned by European Organization for Nuclear Research (CERN), the target of non-Cu JC is set to 1500 A/mm2 at 4.2 K, 16 T. For this target, we have chosen the DT method, which is a type of internal Sn method, and because it has no limitation of Sn solubility, higher JC can be expected. This paper finds that further improvement of JC can be realized by controlling the Sn diffusion condition and the ternary additive elements. By setting the Sn diffusion distance to lower than 48 μm, the Nb3Sn composition in multi-Nb modules becomes uniform and fine. In addition, by controlling the ternary element content (Ti) for improving the characteristics of the middle magnetic field, it is possible to achieve high JC at 16 T.
AB - We have developed a high-performance (high-JC) Nb3Sn wire via a distributed tin (DT) method. Non-Cu JC of 1100 A/mm2 at 16 T, 4.2 K has been achieved by improving the Sn diffusion and optimizing the Ti content. With the future circular collider magnet planned by European Organization for Nuclear Research (CERN), the target of non-Cu JC is set to 1500 A/mm2 at 4.2 K, 16 T. For this target, we have chosen the DT method, which is a type of internal Sn method, and because it has no limitation of Sn solubility, higher JC can be expected. This paper finds that further improvement of JC can be realized by controlling the Sn diffusion condition and the ternary additive elements. By setting the Sn diffusion distance to lower than 48 μm, the Nb3Sn composition in multi-Nb modules becomes uniform and fine. In addition, by controlling the ternary element content (Ti) for improving the characteristics of the middle magnetic field, it is possible to achieve high JC at 16 T.
KW - Bronze method
KW - distributed tin method
KW - NbSn
KW - superconducting wire
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U2 - 10.1109/TASC.2019.2915307
DO - 10.1109/TASC.2019.2915307
M3 - Article
AN - SCOPUS:85065995711
SN - 1051-8223
VL - 30
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 1
M1 - 8713386
ER -