1990 Volume 59 Issue 8 Pages 2758-2775
Analytic expression for the longitudinal adiabatic invariant is derived for general magnetic configuration. The orbit loss is evaluated to determine the outermost loss-free surface. Geometrical factor of the neoclassical transport coefficients in 1⁄ν regime in helical torus is calculated by using the longitudinal adiabatic invariant. The dependence of the particle confinement upon the geometrical parameter is investigated; and the improvement by the inward shift of the plasma is quantitatively clarified.
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