TY - JOUR
T1 - Dependence of transport-current losses in MgB2 superconducting wire on temperature and frequency
AU - Kajikawa, Kazuhiro
AU - Kawano, Tomohiro
AU - Osaka, Ryota
AU - Nakamura, Taketsune
AU - Sugano, Michinaka
AU - Takahashi, Masaya
AU - Wakuda, Tsuyoshi
N1 - Funding Information:
Manuscript received October 16, 2009. First published April 05, 2010; current version published May 28, 2010. This work was supported by the Industrial Technology Research Grant Program in 2008 (08B38006a) from the New Energy and Industrial Technology Development Organization (NEDO) of Japan. K. Kajikawa is with the Research Institute of Superconductor Science and Systems, Kyushu University, Fukuoka 819-0395, Japan (e-mail: kajikawa@sc. kyushu-u.ac.jp). T. Kawano is with the Department of Electrical and Electronic Systems Engineering, Kyushu University, Fukuoka 819-0395, Japan. R. Osaka is with the Department of Electrical Engineering, Kyushu University, Fukuoka 819-0395, Japan. T. Nakamura is with the Department of Electrical Engineering, Kyoto University, Kyoto 615-8510, Japan. M. Sugano is with the Department of Electronic Science and Engineering, Kyoto University, Kyoto 615-8510, Japan. M. Takahashi and T. Wakuda are with the Hitachi Research Laboratory, Hi-tachi, Ltd., Hitachi 319-1292, Japan. Digital Object Identifier 10.1109/TASC.2009.2039746
PY - 2010/6
Y1 - 2010/6
N2 - AC losses of a monofilamentary MgB2 wire in a self-field are experimentally evaluated at several temperatures and frequencies. The alternating transport currents are applied to the straight sample wire, and the AC losses are observed electrically with a lock-in amplifier. The temperature of the sample wire was adjusted by a conduction cooling with gaseous helium, and the stability was below ± 0.1 K near a fixed temperature. The temperature dependence of the transport-current losses was roughly explained with a theoretical expression based on the Bean model, though the experimental results of the transport-current losses slightly depend on the frequency.
AB - AC losses of a monofilamentary MgB2 wire in a self-field are experimentally evaluated at several temperatures and frequencies. The alternating transport currents are applied to the straight sample wire, and the AC losses are observed electrically with a lock-in amplifier. The temperature of the sample wire was adjusted by a conduction cooling with gaseous helium, and the stability was below ± 0.1 K near a fixed temperature. The temperature dependence of the transport-current losses was roughly explained with a theoretical expression based on the Bean model, though the experimental results of the transport-current losses slightly depend on the frequency.
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U2 - 10.1109/TASC.2009.2039746
DO - 10.1109/TASC.2009.2039746
M3 - Article
AN - SCOPUS:77952954997
SN - 1051-8223
VL - 20
SP - 2111
EP - 2114
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 3
M1 - 5443621
ER -