Large Tc, BC2 and Ic enhancement effect due to the prebending treatment for bronze route Nb3Sn wires

K. Watanabe; S. Awaji; H. Oguro; G. Nishijima; K. Miyoshi; S. Meguro

doi:10.1109/TASC.2005.849361

Large T_c, B_C2 and I_c enhancement effect due to the prebending treatment for bronze route Nb₃Sn wires

K. Watanabe, S. Awaji, H. Oguro, G. Nishijima, K. Miyoshi, S. Meguro

IMR - High Field Laboratory for Superconducting Materials

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

In order to develop a react-and-wind (R&W) processed Nb₃Sn superconducting magnet, we investigated the influence on the superconducting properties due to the prebending treatment. Since a reacted Nb₃Sn superconducting wire reveals a very sensitive response from stress and strain, we focus on the prebending treatment which is repeatedly applied to the Nb ₃Sn wire through several pulleys in the R&W coil winding process. We found that the prebending treatment doubles the I_c value at 20 T and 4.2 K for bronze route Nb₃Sn wires. This I_c enhancement effect comes from the T_c and B_c2 enhancement. It turned out that T_c increases from 17.4 to 17.9 K and as a result B_c2 also increases from 23.7 to 25.2 T at 4.5 K for bronze route multifllamentary Nb₃Sn wires prebent at bending strain of 1.0% and at 5 repeated times.

Original language	English
Pages (from-to)	3564-3567
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	15
Issue number	2 PART III
DOIs	https://doi.org/10.1109/TASC.2005.849361
Publication status	Published - 2005 Jun

Keywords

Bending strain
Critical current density
CuNb reinforcement
Nb Sn
React and wind process

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10.1109/TASC.2005.849361

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title = "Large Tc, BC2 and Ic enhancement effect due to the prebending treatment for bronze route Nb3Sn wires",

abstract = "In order to develop a react-and-wind (R&W) processed Nb3Sn superconducting magnet, we investigated the influence on the superconducting properties due to the prebending treatment. Since a reacted Nb3Sn superconducting wire reveals a very sensitive response from stress and strain, we focus on the prebending treatment which is repeatedly applied to the Nb 3Sn wire through several pulleys in the R&W coil winding process. We found that the prebending treatment doubles the Ic value at 20 T and 4.2 K for bronze route Nb3Sn wires. This Ic enhancement effect comes from the Tc and Bc2 enhancement. It turned out that Tc increases from 17.4 to 17.9 K and as a result Bc2 also increases from 23.7 to 25.2 T at 4.5 K for bronze route multifllamentary Nb3Sn wires prebent at bending strain of 1.0% and at 5 repeated times.",

keywords = "Bending strain, Critical current density, CuNb reinforcement, Nb Sn, React and wind process",

author = "K. Watanabe and S. Awaji and H. Oguro and G. Nishijima and K. Miyoshi and S. Meguro",

note = "Funding Information: Manuscript received October 4, 2004. This work was supported in part by the Grant-in-Aid from the Ministry of Education, Culture, Science and Technology, Japan, and in part by the Industrial Technology Research Grant Program from New Energy and Industrial Technology Development Organization (NEDO) of Japan.",

year = "2005",

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T1 - Large Tc, BC2 and Ic enhancement effect due to the prebending treatment for bronze route Nb3Sn wires

AU - Watanabe, K.

AU - Awaji, S.

AU - Oguro, H.

AU - Nishijima, G.

AU - Miyoshi, K.

AU - Meguro, S.

N1 - Funding Information: Manuscript received October 4, 2004. This work was supported in part by the Grant-in-Aid from the Ministry of Education, Culture, Science and Technology, Japan, and in part by the Industrial Technology Research Grant Program from New Energy and Industrial Technology Development Organization (NEDO) of Japan.

PY - 2005/6

Y1 - 2005/6

N2 - In order to develop a react-and-wind (R&W) processed Nb3Sn superconducting magnet, we investigated the influence on the superconducting properties due to the prebending treatment. Since a reacted Nb3Sn superconducting wire reveals a very sensitive response from stress and strain, we focus on the prebending treatment which is repeatedly applied to the Nb 3Sn wire through several pulleys in the R&W coil winding process. We found that the prebending treatment doubles the Ic value at 20 T and 4.2 K for bronze route Nb3Sn wires. This Ic enhancement effect comes from the Tc and Bc2 enhancement. It turned out that Tc increases from 17.4 to 17.9 K and as a result Bc2 also increases from 23.7 to 25.2 T at 4.5 K for bronze route multifllamentary Nb3Sn wires prebent at bending strain of 1.0% and at 5 repeated times.

AB - In order to develop a react-and-wind (R&W) processed Nb3Sn superconducting magnet, we investigated the influence on the superconducting properties due to the prebending treatment. Since a reacted Nb3Sn superconducting wire reveals a very sensitive response from stress and strain, we focus on the prebending treatment which is repeatedly applied to the Nb 3Sn wire through several pulleys in the R&W coil winding process. We found that the prebending treatment doubles the Ic value at 20 T and 4.2 K for bronze route Nb3Sn wires. This Ic enhancement effect comes from the Tc and Bc2 enhancement. It turned out that Tc increases from 17.4 to 17.9 K and as a result Bc2 also increases from 23.7 to 25.2 T at 4.5 K for bronze route multifllamentary Nb3Sn wires prebent at bending strain of 1.0% and at 5 repeated times.

KW - Bending strain

KW - Critical current density

KW - CuNb reinforcement

KW - Nb Sn

KW - React and wind process

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Large T_c, B_C2 and I_c enhancement effect due to the prebending treatment for bronze route Nb₃Sn wires

Abstract

Keywords

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