Search Results - "NISHIJIMA, Gen"

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  1. 1

    Fabrication of Bi-2223 Superconducting Joint by Hot-Pressing Process by Takeda, Yasuaki, Nishijima, Gen, Kobayashi, Kensuke, Kitaguchi, Hitoshi

    “…Superconducting joints between Bi-2223 tapes were fabricated by a hot-pressing process with a 24 h heat treatment. We developed specialized equipment to apply…”
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    Journal Article
  2. 2

    Quench Detection Performance of Low-Temperature Superconducting Quench Detectors for REBCO Tape in Magnetic Fields by Hasegawa, Shin, Ito, Satoshi, Nishijima, Gen, Hashizume, Hidetoshi

    “…A quench detection method using a low-temperature superconducting quench detector (QD) has been proposed to protect rare-earth barium copper oxide (REBCO)…”
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  3. 3

    Mechanical Strength Evaluation of a Yoroi-Coil Structured Non-Circular REBCO Pancake Coil in High Magnetic Field by Watanabe, Tomonori, Nagaya, Shigeo, Ishiyama, Atsushi, Noguchi, So, Ueda, Hiroshi, Nishijima, Gen

    “…In order to achieve a high intensity and compact multifunctional air-core cyclotron, the behavior of non-circular coils in a high magnetic field at 4.2 K were…”
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  4. 4

    Fundamental Evaluations of Applicability of LTS Quench Detectors to REBCO Pancake Coil by Hasegawa, Shin, Ito, Satoshi, Nishijima, Gen, Hashizume, Hidetoshi

    “…Quench detection in a rare-earth barium copper oxide (REBCO) coil is difficult due to the slow normal zone propagation in it. To address this issue, we have…”
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  5. 5

    Tailored joint fabrication process derived ultra-low resistance MgB2 superconducting joint by Patel, Dipak, Matsumoto, Akiyoshi, Kumakura, Hiroaki, Nishijima, Gen, Maeda, Minoru, Kim, Su-Hun, Choi, Seyong, Kim, Jung Ho

    Published in Scripta materialia (01-03-2020)
    “…We report an ultra-low resistance superconducting joint using unreacted multifilament MgB2 wires produced by tailoring the powder compaction pressure within…”
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  6. 6

    Niobium-titanium (Nb-Ti) superconducting joints for persistent-mode operation by Patel, Dipak, Kim, Su-Hun, Qiu, Wenbin, Maeda, Minoru, Matsumoto, Akiyoshi, Nishijima, Gen, Kumakura, Hiroaki, Choi, Seyong, Kim, Jung Ho

    Published in Scientific reports (03-10-2019)
    “…Superconducting joints are essential for persistent-mode operation in a superconducting magnet system to produce an ultra-stable magnetic field. Herein, we…”
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  7. 7

    Evaluation of in-plane and out-of-plane crystallinities with residual amorphous phases for MgB2 superconductor by Maeda, Minoru, Choi, Jun Hyuk, Lee, Dong Gun, Matsumoto, Akiyoshi, Nishijima, Gen, Jiang, Zhenan, Strickland, Nicholas M., Kim, Jung Ho, Choi, Seyong

    Published in Ceramics international (01-10-2024)
    “…We focus on in-plane and out-of-plane crystallinities of the MgB2 superconductor. These two structural properties were evaluated in terms of peak broadening at…”
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  8. 8

    Evaluation and control of residual amorphous phases in carbon-doped MgB2 superconductors by Choi, Seyong, Patel, Dipak, Kim, Jung Ho, Kumakura, Hiroaki, Matsumoto, Akiyoshi, Nishijima, Gen, Kim, Su-Hun, Joo, Jinho, Maeda, Minoru

    Published in Journal of alloys and compounds (25-05-2021)
    “…•Hydrocarbon doping into MgB2 materials retarded the formation of the main phase.•The doping thus led to an increase in amorphous impurities.•However, the…”
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  9. 9

    Influence of Sintering Conditions on Bending Tolerance at RT and Ic of In Situ MgB2 wire by Tanaka, Hideki, Suzuki, Takaaki, Kodama, Motomune, Nishijima, Gen, Matsumoto, Akiyoshi

    “…Critical bending strains at room temperature and Ic values at 10-20 K of two kinds of in situ round MgB2 wires ("A" and "B" hereafter) were measured. Wire A is…”
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  10. 10

    Influence of out-of-plane disorder formed by low-temperature sintering on carbohydrate-doped MgB2 wire by Maeda, Minoru, Patel, Dipak, Kumakura, Hiroaki, Nishijima, Gen, Matsumoto, Akiyoshi, Kim, Su-Hun, Choi, Seyong

    Published in Ceramics international (01-09-2020)
    “…Structural disorder within grains formed by carbon doping is widely known to enhance the in-field transport critical current performance of MgB2 wire. The…”
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  11. 11

    Degradation of a REBCO Coil Due to Cleavage and Peeling Originating From an Electromagnetic Force by Kajita, Kentaro, Iguchi, Seiya, Yi Xu, Nawa, Masato, Hamada, Mamoru, Takao, Tomoaki, Nakagome, Hideki, Matsumoto, Shinji, Nishijima, Gen, Suematsu, Hiroto, Takahashi, Masato, Yanagisawa, Yoshinori

    “…This paper presents the results of a high field generation test for layer-wound HTS coils in a background magnetic field. The test revealed new types of…”
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  12. 12

    Estimation of Joint Resistance in REBCO Single-Turn Loop Under Magnetic Fields by Matsumoto, Shinji, Nishijima, Gen, Nakai, Akinobu, Sakamoto, Hisaki, Mukoyama, Shinich, Miyoshi, Yasuyuki, Saito, Kazuyoshi, Hamada, Mamoru

    “…The technological development for a 3-T high-temperature superconducting (HTS) magnetic resonance imaging (MRI) magnet is underway. The 3-T HTS MRI magnet is…”
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  13. 13

    Transport Property of REBCO Superconducting Joints in Magnetic Fields at Various Temperatures by Nishijima, Gen, Matsumoto, Shinji, Nakai, Akinobu, Sakamoto, Hisaki, Mukoyama, Shinichi, Miyoshi, Yasuyuki, Saito, Kazuyoshi, Hamada, Mamoru

    “…We are developing a cryocooled (RE)Ba2Cu3O7 (REBCO; RE = rare earth) persistent-mode superconducting magnet system that generates 1 T with multiple…”
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  14. 14
  15. 15

    International Round Robin Test for Critical Current Measurement of RE-Ba-Cu-O Superconducting Tapes by Nishijima, Gen, Osamura, Kozo, Nagaishi, Tatsuoki, Fukushima, Toru, Iijima, Yasuhiro, Koizumi, Tsutomu, Yifei Zhang, Breschi, Marco, Chaud, Xavier, Hyung-Seop Shin, Kiss, Takanobu

    “…VAMAS TWA 16 promoted an international round robin test (RRT) on critical current (I c ) measurement of RE-BaCu-O (REBCO; RE = rare earth) superconductors to…”
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  16. 16

    Experimental Verifications of REBCO Layer Winding Aimed at Persistent Current Operation by Miyoshi, Yasuyuki, Saito, Kazuyoshi, Hamada, Mamoru, Matsumoto, Shinji, Nishijima, Gen, Nakasaki, Ryusuke, Nakai, Akinobu, Sakamoto, Hisaki, Mukoyama, Shinichi

    “…Recent development in the superconducting REBCO joints is an encouraging prospect for realizing an HTS magnet in persistent current mode operation. In our…”
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  17. 17
  18. 18

    Shimming for the 1020 MHz LTS/Bi-2223 NMR Magnet by Iguchi, Seiya, Yanagisawa, Yoshinori, Takahashi, Masato, Takao, Tomoaki, Hashi, Kenjiro, Ohki, Shinobu, Nishijima, Gen, Matsumoto, Shinji, Noguchi, Takashi, Tanaka, Ryoji, Suematsu, Hiroto, Saito, Kazuyoshi, Shimizu, Tadashi

    “…Using a Bi-2223 innermost coil, the world's first NMR magnet with a frequency beyond 1 GHz has been developed and operated at the National Institute for…”
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  20. 20

    Operation of 1020-MHz NMR Superconducting Magnet by Nishijima, Gen, Matsumoto, Shinji, Hashi, Kenjiro, Ohki, Shinobu, Goto, Atsushi, Noguchi, Takashi, Sakai, Shuji, Shimizu, Tadashi

    “…We had successfully operated the 1020-MHz (24.0 T) nuclear magnetic resonance (NMR) spectrometer for 8 months, including the cooling down, shimming, and the…”
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