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Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
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Volume 45, Issue 6
Displaying 1-4 of 4 articles from this issue
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  • On the Output Conditions of the DD Fusion Reactor. II.
    Magnetic-Mirror “Catalyzed DD” Reactor
    Takasi Kurasawa
    1981 Volume 45 Issue 6 Pages 560-563
    Published: 1981
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.45.560
    JOURNAL FREE ACCESS
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    The general method of Nozawa-Steiner for analysis of the power balance in fusion reactors is applied to the case of the magnetic-mirror “Catalyzed DD” fusion reactor. In order to achieve the overall plant efficiency η =30%, we need the plasma of the Lawson number nτ=1015cm-3 sec, in case of ηd=0.7ηt =0.4, ηh=0.7, ηa=1 and Ti =200KeV.
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  • Characteristics of Pulsed Ion Beams Extracted from Inverse Reflex Tetrodes
    Shigeru Kato, Tsutomu Takahashi, Hirotaka Kanazawa, Keiichi Kamada, Ka ...
    1981 Volume 45 Issue 6 Pages 564-578
    Published: 1981
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.45.564
    JOURNAL FREE ACCESS
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    Pulsed ion beams were extracted from inverse reflex tetrodes and their characteristics were investigated in detail. The inverse reflex tetrodes were fed by a coaxial blumlein line, which was charged by a marx generator. Current neutralized proton beams with a peak energy of 180 keV were obtained with the extraction angle of about 2-3 degree. The value of proton beam current was almost 400 A, and the maximum flux density was 40 A/cm2. Virtual cathode formations and electron reflexing effects were also assured.
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  • Helical Symmetric Reversed Field Configurations with Minimum Potential Energy
    Hiroshi OSHIYAMA
    1981 Volume 45 Issue 6 Pages 580-586
    Published: 1981
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.45.580
    JOURNAL FREE ACCESS
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    The Helical symmetric reversed field configurations with minimum potential energy has been studied by applying the variational principles to the cylindrical plasma of finite plasma pressure.
    The helical symmetric magnetic field with finite pressure gradient, which is derived from the MHD equilibrium equation, can't satisfy the condition of minimum potential energy obtained based on the Woltjer's invariance.
    An axisymmetric RFP which satisfies the Woltjer's invariance, can only confine the pressure gradient plasma without destroying the MHD equilibrium.
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  • Measurement of Plasma Position in the JIPP T-II Tokamak by Using Poloidal Field Distributions
    Keiichi Sakurai, Satoru Hirokura, Yoshiyuki Ono, Shyugo Tanahashi
    1981 Volume 45 Issue 6 Pages 588-599
    Published: 1981
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.45.588
    JOURNAL FREE ACCESS
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    Poloidal magnetic field measured outside a plasma column consists of externally applied vertical field and the field produced by a plasma current. if we assume that the plasma current is replaced by a finite number of loop-currents and that the externally applied vertical field is produced by externally located loop-currents, the externally applied vertical field can be separated from the poloidal magnetic field due to the plasma current with the help of a method of least squares. Consequently, the value of the plasma current, flux surfaces of the externally applied vertical field and the plasma position can be obtained.
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