Kakuyūgō kenkyū
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
Volume 37, Issue 5
Displaying 1-2 of 2 articles from this issue
  • Yoshinori KENMOCHI, Masatomo SATO
    1977 Volume 37 Issue 5 Pages 368-385
    Published: 1977
    Released on J-STAGE: March 04, 2011
    JOURNAL FREE ACCESS
    The excitation of Alvén waves by high-energy ions in a Tokamak is investigated on the basis of the Vlasov equation, thus taking account of the finite gyro-radius and the finite orbit size of the ions. It is found that (i) The, growth rate of instability due to the spatial inhomogeneity of trapped fast ions is reduced for short wave perturbations (k±ρα_??_1, where ρα is the gyro-radius of fast ions), and (ii) There appears an instability, not present in the drift approximation (k±ρα<<1), when the trapped fast ions are spatially homogeneous having a monoenergetic distribution. The growth rate is comparable to the corresponding one due to untrapped fast ions if the velocity of fast ions is not greater than the Alfven velocity.
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  • [in Japanese], [in Japanese], [in Japanese]
    1977 Volume 37 Issue 5 Pages 386-412
    Published: 1977
    Released on J-STAGE: March 04, 2011
    JOURNAL FREE ACCESS
    Download PDF (1263K)
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