Kakuyūgō kenkyū
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
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Volume 63, Issue 4
Displaying 1-4 of 4 articles from this issue
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  • Soft X ray Radiation Confinement in Laser Fusion
    Hiroaki Nishimura, Hideaki Takabe, Hiroyuki Shiraga, Yoshiaki Kato, Sa ...
    1990 Volume 63 Issue 4 Pages 219-234
    Published: April 20, 1990
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.63.219
    JOURNAL FREE ACCESS
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    Conversion of intense laser radiation into incoherent thermal X rays and confinement of the X-ray radiation within a cavity are effective to overcome nonuniform energy deposition to a fusion pellet arising from the direct laser irradiation. We describe here the present understanding of the radiation confinement in cavities heated by lasers. Principles of the confinement are explained by the theoretical model treating a radiation heat wave propagating through the wall of a cavity. Experimental results on radiation confinement obtained under the joint program between ILE-Osaka and MPQ-Garching by using the Gekko XII glass laser system are briefly reported.
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  • Role of Studies on Plasma-Wall Interactions in Fusion Research Development
    Takaichi Kawamura
    1990 Volume 63 Issue 4 Pages 235-247
    Published: April 20, 1990
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.63.235
    JOURNAL FREE ACCESS
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    An introductory review on the role of studies on plasma-wall interactions in fusion research development i s given. The control effect of the boundary plasma on plasma-wall interactions at the first walls of toroidal devices is discussed in connection with the material selection for the first wall.
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  • Neutron Yield from p11B Fusion Plasma
    Yuzo Fukai
    1990 Volume 63 Issue 4 Pages 248-270
    Published: April 20, 1990
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.63.248
    JOURNAL FREE ACCESS
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    It is presented to estimate yields of neutron and radioactive nucleus (7Be, 12B, 10C, 11C, 14C, 13N) per one p11B fusion reaction by the following 15 reactions : 11B (p, n) 11C, 11B (α, n) 14N, 11B (α, p) 14C, (α, n) of the structure material (SUS316) bombarded by α-particles, (γ, n) of the same and 11B (γ, n) 10B by 16MeV γ -ray of 11B (p, γ) 12C, 10B (p, n) 10C, 10B (α, n) 13N, 10B (p, γ) nc, 10B (p, α) 7Be, 11B (d, n) 12C, 11B (d, 2n) 11C, 11B (d, p) 12B, 10B (d, n) 11 10B (d, n) C and D (d, n) 3He, in the p11B fusion plasma with impurities of 10B and D. Result shows that the neutron yields by the other 7 reactions than11B (p, n) 11C, 11B (α, n) 14N, SUS316 (γ, n) and 11B (d, n) 12C can be neglected (< 10-7). Neutron yield and averaged energy by the above 4 main reactions are 2.27×10-3 and 2.49 MeV, and, 9.62×10-5 and 3.93 MeV from the plasma of Ti=300keV and Ti/Te=1, and Ti/Te=200, respectively.
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  • Calculation of Magnetic Field of the Helical Coils
    Jiro Todoroki
    1990 Volume 63 Issue 4 Pages 271-281
    Published: April 20, 1990
    Released on J-STAGE: March 04, 2011
    DOIhttps://doi.org/10.1585/jspf1958.63.271
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    Formulae of magnetic field calculation of finite size helical coils [Kakuyugo Kenkyu 57 (1988) 318] are extended to the case that the cross section of the coil varies along the guiding curve of the helical coil. The systemetic error in the numerical integration is discussed in the connection with the incorrect model of helical coil current; the curl of the magnetic field may remain around the coils because of the finite number of integration points.
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