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[en] The effect of finite-ion-Larmor-radius averaging and of ion Landau damping on ballooning modes is investigated for a large-aspect-ratio circular-cross-section tokamak equilibrium. - Finite-Larmor-radius (FLR) effects are found to be weakly de-stabilizing for small values of the FLR parameter kasub(i), but become strongly stabilizing for kasub(i) approximately 0.5. A residual instability driven by inverse ion Landau damping persists, however, at shorter wavelengths (kasub(i)>0.5). (author)
Journal
Nuclear Fusion; ISSN 0029-5515; 
; v. 21(6); p. 651-656
; v. 21(6); p. 651-656