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Tatsumoto, Hideki; Shirai, Yasuyuki*; Shiotsu, Masahiro*; Naruo, Yoshihiro*; Kobayashi, Hiroaki*; Inatani, Yoshifumi*
Journal of Physics; Conference Series, 507(2), p.022042_1 - 022042_4, 2014/05
Times Cited Count：2 Percentile：67.35(Engineering, Electrical & Electronic)An experimental system has been developed to investigate electro-magnetic properties of high-Tc superconductors cooled by liquid hydrogen under the external magnetic field of up to 7 T. A LH
cryostat with a LH inventory of 61 L is concentrically mounted on the inside of a LHe cryostat to cool a NbTi superconducting magnet. The experimental system is installed in an explosion-proof room and explosion proof electrical devices are used. The current leads are covered with an enclosure filled with nitrogen gas. A remote control system has been developed to maintain safety distance. Furthermore, the effects of stray magnetic field on the existing and the new devices are investigated and electro-magnetic shielding panels and enclosure made of iron were designed using ANSYS analysis. It is confirmed through the cryogenic test that the experimental system meets the design requirements.
c characteristics in PIT wires based on BaFeAs with different substitutionsTamegai, Tsuyoshi*; Pyon, S.*; Ding, Q. P.*; Inoue, Hiroshi*; Kobayashi, Hiroki*; Tsuchiya, Yuji*; Sun, Y.*; Kajitani, Hideki; Koizumi, Norikiyo
Journal of Physics; Conference Series, 507(2), p.022041_1 - 022041_4, 2014/05
Times Cited Count：3 Percentile：76.6(Engineering, Electrical & Electronic)The author studied the effect of chemical compound for superconducting performance (c) of iron-based superconductors. As a result, it was revealed that BaFeAs showed high Jc. And more, BaFeAs showed higer c such as 32,000A/cm
(4.2K) by being applied of 120 MPa of hot isostatic pressure (HIP). Thus, higher c performance could be achieved.
