Experimental results on tokamak beta limits from ISX-B

G.H. Neilson, A.J. Wootton, J.D. Bell, C.E. Bush, A. Carnevali, J.L. Dunlap, P.H. Edmonds, A.C. England, W.L. Gardner, H.C. Howe1985年被引用 11Nuclear FusionIF 3 出版社

It is observed that the expression β = A⟨β⟩qψ / κ = 18–22% defines one of the operational boundaries for ISX-B and corresponds to empirical beta limit scalings obtained in other tokamaks. Although this expression closely agrees with simple expressions for ideal-MHD instability thresholds, it is not obvious that it constitutes a real tokamak beta limit. Confinement degradation is observed when β is well below this operating boundary, and there is neither experimental evidence nor a satisfactory theoretical model connecting this phenomenon with ideal-MHD activity.

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