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A conduction cooled superconducting magnet using high-Tc oxide current leads

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7 Author(s)
Hata, F. ; Inst. for Mater. Res., Tohoku Univ., Sendai, Japan ; Sakuraba, J. ; Chong, C.K. ; Yamada, Y.
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We demonstrated a conduction cooled (Nb,Ti)3Sn superconducting magnet system without liquid helium. The magnet system is mainly composed of (Nb,Ti)3Sn superconducting coil, high-T c oxide current leads, a GM cryocooler and a cryostat. The (Nb,Ti)3Sn superconducting coil cooled by the second stage of the cryocooler is operated at 11 K in vacuum. The cylindrical (Bi,Pb) 2Sr2Ca2Cu3 oxide current leads were cooled below 77 K by the cryocooler. This system generates a magnetic field of 4.6 T in a 38 mm room temperature bore at the operating current of 465 A. Two hours holding at the operating current of 400 A were performed

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Magnetics, IEEE Transactions on  (Volume:30 ,  Issue: 4 )