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Author(s):
J. Todoroki
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Title:
Adiabatic Invariant and Evaluation of Particle Loss in Helical Torus
Date of publication:
Feb. 1990
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Key words:
adiabatic invariant, particle loss, helical torus, LHS, neoclassical transport, numerical calculation, stellarator
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Abstract:
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/upsilon regime in helical torus is calculated by using the longitudinal adiabatic invariant . The dependence of the particle confinement upon the geometrical parameter is investigated for N=10 configurations ; and the improvement by the inward shift of the magnetic axis is quantitatively clarified.
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