TY - JOUR
T1 - Normal zone propagation and quench characteristics of Nb 3Sn wires with jelly-roll and in-situ processed CuNb reinforcements
AU - Murase, Satoru
AU - Murakami, Tomoyuki
AU - Seto, Toshiyuki
AU - Shimamoto, Susumu
AU - Awaji, Satoshi
AU - Watanabe, Kazuo
AU - Saito, Takashi
AU - Iwaki, Genzo
AU - Meguro, Shin Ichiro
N1 - Funding Information:
Manuscript received September 17,2000. This work was supported in part by Grant-in-aid of the scientific research from the Ministry of Education, Science and Culture, Japan. S. Murase, T. Seto and S. Shimamoto are with Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan (telephone: 81-22-217-7115, 7116, and 7128, respectively, e-mail: murase @ecei.tohoku.ac.jp, shimaO4@ec.ecei.tohoku.ac.jp, and shimamot @ecei.tohoku.ac.jp, respectively). T. Murakami was with Tohoku University. He is now with Department of Energy Science, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Yokohama 226-8502,J apan (telephone: 81-45-924-5668e,-m ail: murakami@es.titech.ac.jp). S. Awaji and K. Watanabe are with Institute for Materials Research, Tohoku University, Sendai 980-8577,J apan (telephone: 81-22-215-2148 and 81-22-215-2150,r espectively, e-mail: awaji@imr.tohoku.ac.jp and kwata@imr.tohoku.ac.jp, respectively). G. Iwaki is with Hitachi Cable Ltd, Tsuchiura 300-0026,J apan T. Saito is with Fujikura Ltd., Tokyo 135-0042 S. Meguro is with the Furukawa Electric Co., Ltd., Nikko, 321-1493, Japan
PY - 2001/3
Y1 - 2001/3
N2 - The stability of three types of CuNb reinforced Nb 3Sn wires has been experimentally studied in order to clarify effects of critical current density, J c, and Nb fraction in CuNb reinforcements. The stabilities, i.e., minimum quench energy, MQE, and normal zone propagation velocity, v p, were evaluated for sample wires having low J c and low Nb fraction (A) and high J c and low Nb fraction (B) with in-situ processed CuNb reinforcement and high J c and high Nb fraction with jelly-roll processed CuNb reinforcement (C). The MQE decreased with increase in transport current density normalized by J c, critical generation density, and Nb fraction, on the other hand, v p increased with increasing the transport current density, regardless of Nb fraction. We obtained basic data for the design of magnets having both a high stability and mechanical strength.
AB - The stability of three types of CuNb reinforced Nb 3Sn wires has been experimentally studied in order to clarify effects of critical current density, J c, and Nb fraction in CuNb reinforcements. The stabilities, i.e., minimum quench energy, MQE, and normal zone propagation velocity, v p, were evaluated for sample wires having low J c and low Nb fraction (A) and high J c and low Nb fraction (B) with in-situ processed CuNb reinforcement and high J c and high Nb fraction with jelly-roll processed CuNb reinforcement (C). The MQE decreased with increase in transport current density normalized by J c, critical generation density, and Nb fraction, on the other hand, v p increased with increasing the transport current density, regardless of Nb fraction. We obtained basic data for the design of magnets having both a high stability and mechanical strength.
KW - Composite wire
KW - CuNb reinforcement
KW - Nb Sn
KW - Normal zone propagation
KW - Quench
KW - Stability
KW - Superconductor
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U2 - 10.1109/77.919850
DO - 10.1109/77.919850
M3 - Conference article
AN - SCOPUS:0035268482
SN - 1051-8223
VL - 11
SP - 3627
EP - 3630
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 1 III
T2 - 2000 Applied Superconductivity Conference
Y2 - 17 September 2000 through 22 September 2000
ER -