TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan)
Online ISSN : 1880-0408
Print ISSN : 0389-2441
ISSN-L : 0389-2441
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Volume 4, Issue 3
Displaying 1-4 of 4 articles from this issue
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  • Ortho Para Hydrogen
    The Measurement of Ortho Hydrogen Concentration, Ortho-Para Conversion and the Enrichment of Ortho Hydrogen
    Hiroshi NAGANO, Juichi ISHII
    1969 Volume 4 Issue 3 Pages 114-121
    Published: July 15, 1969
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2221/jcsj.4.114
    JOURNAL FREE ACCESS
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    Two thermal conductivity methods, a batch method and a continous flow method have been developed for the measurement of ortho (para) hydrogen concentration. Experimental studies of ortho-para conversion and ortho hydrogen enrichment by selective adsorption and desorption method are discussed.
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  • The Observation of Quantum Interference Effect
    Yoshio HIROSE
    1969 Volume 4 Issue 3 Pages 122-129
    Published: July 15, 1969
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2221/jcsj.4.122
    JOURNAL FREE ACCESS
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    Some observations of the quantum interference effects associated with Josephson junctions have been carried out. The final aim of this research is the development of a sensitive magnetometer and its application to the measurement of thermal expansion coefficient of metal at low temperatures, for which this is a preliminary study. A device with a periodicity to applied field of about 100μ gauss has been constructed.
    (This work has been done at physics department in the University of Toronto in Canada.)
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  • Characteristics of Superconducting Point Contact Junctions
    Hiroshi OHTA
    1969 Volume 4 Issue 3 Pages 130-137
    Published: July 15, 1969
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2221/jcsj.4.130
    JOURNAL FREE ACCESS
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    Characteristics of superconducting point contact junctions are investigated both theoretically and experimentally. The dependence of the maximum zero-voltage current on contact pressure is measured with Nb-Nb superconducting point contact junctions. The experimental results are qualitatively consistent with those theories which were recently presented by several authors. There are also observed the characteristics which are not satisfactorily explained yet. The usefulness of the superconducting point contact junction as a far-infrared detector is examined theoretically for the future experiment.
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  • Stabilization of Superconducting Wire and Minimum Propagation Current
    Toshinari ANDO, Hisayasu KOBAYASHI
    1969 Volume 4 Issue 3 Pages 138-142
    Published: July 15, 1969
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2221/jcsj.4.138
    JOURNAL FREE ACCESS
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    Minimum propagation current (Ip) and V-I characteristics were investigated for composite Nb-Ti superconducting wire (10mil in dia) claded by two methods; electro plating and metallurgical bonding. The dependence of Ip and V-I characteristics on thickness of copper was measured. Experimental results were discussed by heat transfer between liq. He and composite superconducting wire.
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