Search Results - "NISHIJIMA, Gen"
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Fabrication of Bi-2223 Superconducting Joint by Hot-Pressing Process
Published in IEEE transactions on applied superconductivity (01-08-2023)“…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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2
Quench Detection Performance of Low-Temperature Superconducting Quench Detectors for REBCO Tape in Magnetic Fields
Published in IEEE transactions on applied superconductivity (01-08-2021)“…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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Mechanical Strength Evaluation of a Yoroi-Coil Structured Non-Circular REBCO Pancake Coil in High Magnetic Field
Published in IEEE transactions on applied superconductivity (01-09-2022)“…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
Fundamental Evaluations of Applicability of LTS Quench Detectors to REBCO Pancake Coil
Published in IEEE transactions on applied superconductivity (01-08-2019)“…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
Tailored joint fabrication process derived ultra-low resistance MgB2 superconducting joint
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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Niobium-titanium (Nb-Ti) superconducting joints for persistent-mode operation
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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Evaluation of in-plane and out-of-plane crystallinities with residual amorphous phases for MgB2 superconductor
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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Evaluation and control of residual amorphous phases in carbon-doped MgB2 superconductors
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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Influence of Sintering Conditions on Bending Tolerance at RT and Ic of In Situ MgB2 wire
Published in IEEE transactions on applied superconductivity (01-08-2019)“…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
Influence of out-of-plane disorder formed by low-temperature sintering on carbohydrate-doped MgB2 wire
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
Degradation of a REBCO Coil Due to Cleavage and Peeling Originating From an Electromagnetic Force
Published in IEEE transactions on applied superconductivity (01-06-2016)“…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
Estimation of Joint Resistance in REBCO Single-Turn Loop Under Magnetic Fields
Published in IEEE transactions on applied superconductivity (01-08-2019)“…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
Transport Property of REBCO Superconducting Joints in Magnetic Fields at Various Temperatures
Published in IEEE transactions on applied superconductivity (01-08-2019)“…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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1020 MHz single-channel proton fast magic angle spinning solid-state NMR spectroscopy
Published in Journal of magnetic resonance (1997) (01-12-2015)“…This study reports a first successful demonstration of a single channel proton 3D and 2D high-throughput ultrafast magic angle spinning (MAS) solid-state NMR…”
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15
International Round Robin Test for Critical Current Measurement of RE-Ba-Cu-O Superconducting Tapes
Published in IEEE transactions on applied superconductivity (01-06-2018)“…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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Experimental Verifications of REBCO Layer Winding Aimed at Persistent Current Operation
Published in IEEE transactions on applied superconductivity (01-06-2018)“…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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Large transport critical currents of powder-in-tube Sr0.6K0.4Fe2As2/Ag superconducting wires and tapes
Published in Physica. C, Superconductivity (15-01-2010)Get full text
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18
Shimming for the 1020 MHz LTS/Bi-2223 NMR Magnet
Published in IEEE transactions on applied superconductivity (01-06-2016)“…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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19
Efficiency of High Magnetic Fields in Solid-state NMR
Published in Chemistry letters (05-02-2016)“…Recently, we have successfully developed a 1020-MHz (24.0 T) NMR system. The NMR magnet consists of superconducting coils having low critical temperature and…”
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Operation of 1020-MHz NMR Superconducting Magnet
Published in IEEE transactions on applied superconductivity (01-06-2016)“…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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