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 15, Issue 3
Displaying 1-3 of 3 articles from this issue
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  • Laser Fusion Targets
    Hiroshi TSUBAKIHARA, Masahiro NAKATSUKA, Uichi KUBO
    1980 Volume 15 Issue 3 Pages 165-172
    Published: July 15, 1980
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2221/jcsj.15.165
    JOURNAL FREE ACCESS
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    Many kinds of laser fusion targets have been used for the laser-target interaction experiments. In this report, we have summarized the fabrication techniques of three types of the targets; (i) gas filled microsphere targets, (ii) parafinic deuterium compound targets and (iii) cryogenic targets. These techniques should be useful to fabricate the high gain targets for the future laser fusion reactors.
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  • Effect of Low Temperature Reactor Irradiation on Organic Insulators in Superconducting Magnets (III)
    Liquid Helium Test
    Teruo KATO, Saburo TAKAMURA
    1980 Volume 15 Issue 3 Pages 173-178
    Published: July 15, 1980
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2221/jcsj.15.173
    JOURNAL FREE ACCESS
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    Organic insulators, such as polyimide, epoxy resins and fiber reinforced epoxies (FRP), are irradiated in the fission reactor at about 5K and their mechanical properties are measured in liquid helium without warm-up. At the very low temperature, the materials are completely brittle and the serration in the stress-strain curves takes place on polyimide, epoxy resins and CFRP.
    After irradiation of the absorbed dose of 1.1×109 rad at about 5K, the breaking stress of epoxy resins reduces by 30-40% and FRP and polyimide exhibit a little decrease in the mechanical strength. FRP and polyimide have good radiation resistance on the mechanical behavior after dose of -1×109 rad as compared with other selected organic materials.
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  • Superconducting Properties of Nb3Sn Multifilamentary Tape Prepared from 5at.% Cu-Sn Alloy
    Yoichi KIMURA, Makio WATANABE
    1980 Volume 15 Issue 3 Pages 179-183
    Published: July 15, 1980
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2221/jcsj.15.179
    JOURNAL FREE ACCESS
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    The Nb3Sn tape consisting of 27 filaments in a Nb matrix was made by means of the internal diffusion between a 5at.%Cu-Sn alloy and Nb. The Nb3Sn layer could be formed in several hours and was found to have a critic al temperature of 17.6K. Overall current density of 2.0×104A/cm2 at 100kG was obtained for a suitably heat treated sample for which the ratio of Nb3Sn to the composite was below 5%.
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