Kakuyūgō kenkyū
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
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Volume 41, Issue 4
Displaying 1-3 of 3 articles from this issue
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  • Concept of Circulatory Mirror Reactor
    T. Ishimura
    1979 Volume 41 Issue 4 Pages 279-285
    Published: 1979
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.41.279
    JOURNAL FREE ACCESS
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    A new type fusion reactor is proposed. The reactor consists of four identical mirror machines each of which is equipped with a plasma-neutral particle converter. The mirror machine is asymmetric so that the magnetic field of the one end of the machine is larger than that of the other end. So, the plasma trapped in the mirror machine is lost through the end of weaker field. The plasma flux lost through the end enters the plasma-neutral particle converter where ions of the plasma aquire surplus energy and, then, change into neutral particles by charge exchange collision in a gas chamber. The neutral particle beam from the plasma-neutral beam converter is injected into the next mirror machine through the entrance port attached at the side of the machine. The ion confinement time of the reactor is expected to be several times longer than that of each mirror machine composing the reactor. Since the energy which is necessary to compensate the energy loss from the reactor is supplied to the ions during their fleight in the plasma-neutral particle converter, it is not necessary to equip the reactor with any neutral beam injector.
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1979 Volume 41 Issue 4 Pages 286-316
    Published: 1979
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.41.286
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • Accuracy of the Estimation of Wave-Number Spectrum Parameters by Probe-Pair Method
    Naofumi Iwama, Yasuo Ohba, Takashige Tsukishima
    1979 Volume 41 Issue 4 Pages 317-340
    Published: 1979
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.41.317
    JOURNAL FREE ACCESS
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    Estimation of spectrum parameters of a stationary and homogeneous random field is examined in terms of a pair of fixed probes. The effect of finite probe volumes on estimators for determining the mean wave-number and the wave-number spectral width is studied by integrating the random field over the probe volumes. So long as this effect is unsignificant, the estimate biases tend to decrease with the probe separation, while the statistical errors are enhanced. Thus there exists an optimum probe separation. Various types of correlators may be used for evaluating the complex covariance of the probe signals easily. However a method of evaluation, which is analogous to the pulse-pair processing in radar systems, is preferred by reason of relatively high statistical accuracy.
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