Kakuyūgō kenkyū
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
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Volume 58, Issue 3
Displaying 1-6 of 6 articles from this issue
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  • High Frequency Discharges in Vacuum
    Susumu Takeda
    1987 Volume 58 Issue 3 Pages 235-243
    Published: September 20, 1987
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.58.235
    JOURNAL FREE ACCESS
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    A Discharge phenomenon is one of the technological problems in fusion devices. Particularly, since the breakdown in a feeding circuit of a high power for wave heating of plasmas limits the available high frequency power, some knowledge of the discharges would be essential to design the feeder system. General explanation for high frequency discharges with and without magnetic fields is summarized mainly in vacuum, including atmospheric and low pressure gases.
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  • Directly Driven Implosion by Laser
    Hideaki Takabe
    1987 Volume 58 Issue 3 Pages 244-254
    Published: September 20, 1987
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.58.244
    JOURNAL FREE ACCESS
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    Direct drive scheme has a potential advantage of less energy requirement for demorstrating fuel ignition in ICF, because the coupling efficiency from a driver to DT fuel can be 10% or more. The key issue for this scheme is uniformity and/or stability of spherically symmetric implosion dynamics. I briefly review this scheme from its principle, recent experimental results to future prospects, especially focusing on the stability of its dynamics.
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  • Indirect-drive Implosion by Lasers
    Hiroaki Nishimura
    1987 Volume 58 Issue 3 Pages 255-264
    Published: September 20, 1987
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.58.255
    JOURNAL FREE ACCESS
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    Fundamental physics on indirect-drive implosion by an intense laser pulse is reviewed. This type of implosion is superior to the direct-drive implosion on a view point of heating uniformity and hydrodynamical stability, however, there are many problems to be clarified in radiation-hydrodynamics of dense matter. X-ray conversion, absorption and implosions driven by X-rays are discussed with recent experimental data and simulations.
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  • A Numerical Method for Nonlinear Eigenvalue/Boundary-Value Problems by HIDM
    Tsuguhiro Watanabe, Kenji Abe, Akira Ishida, Yasumasa Kanada, Kyoji Ni ...
    1987 Volume 58 Issue 3 Pages 265-278
    Published: September 20, 1987
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.58.265
    JOURNAL FREE ACCESS
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    A powerful numerical method for nonlinear eigenvalue problems and for boundary value problems is developed based on a shooting scheme using the new numerical method HIDM (Higher order implicit difference method). Numerical stability of the shooting scheme is achieved by “tournament multi-divided shooting” method.
    The method is applied to several problems and proved its good performance.
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  • Application of EMILAC to Pellet Injection
    Yasuhiro Iwamura, Takao Yamasaki, Hirone Nakamura, Mitsuo Hashimoto, K ...
    1987 Volume 58 Issue 3 Pages 279-294
    Published: September 20, 1987
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.58.279
    JOURNAL FREE ACCESS
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    A new type of elecromagnetic accelerator for pellet injection is proposed. Projectile of cylinder shape is accelerated with the repulsive force generated by a combination of two coils, which are different in purpose. And the accelerator is named EMILAC (Electro-Magnetic Inductive Linear Accelerator). In this papaer, we investigate the method of applying EMILAC to pellet injection, and calculate the ablation rate of pellet.
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  • Data Processing Computer System for Laser Fusion Experiment
    Shunji Ido, Eiji Takei
    1987 Volume 58 Issue 3 Pages 295-310
    Published: September 20, 1987
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.58.295
    JOURNAL FREE ACCESS
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    This article describes the development and present situation of the data processing system for laser fusion experiment using GEKKO XII glass laser. To achieve flexibility of the system and capability to process large amount of image data, we introduced and developed a system where several 16 bit microcomputers are connected to a 32 bit super minicomputer (FACOM S-3300). This report shows the present potential of the S-3300-microcomputer system, and presents the method of file transfer between these computers.
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