Neoclassical Flow, Current, and Rotation in General Toroidal Systems

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Neoclassical theories for the parallel flow, current and rotation are extended to amultispecies plasma in general toroidal systems. The extended theory is constructed inthe Boozer coordinate system to be common in all collisionalities (1/v, plateau,Pfirsh-Schliiter regime) in terms of the geometric factor. It is shown that the decisivedifference between axisymmetric and non-axisymmetric toroidal systems is attributedto the geometric factor which reflects the breaking of axisyrnmetry. As a result it isfirst found that the neoclassical current driven directly by the radial electric field canexist in the non-axisymmetric device, whereas such the current vanishes in the axisym-metric torus. Explicit expressions for poloidal and toroidal rotations are first derivedfor a multispecies plasma in the non-axisymmetric toroidal system. In the limit ofsmall geometric factor, the poloidal and toroidal rotations of ions are reduced to theusual diamagnetic and E X B drifts.[neoclassica1 theory, non-axisymmetric system, geometric factor, parallel flow, lj bootstrap current, rotation, radial electric fieldl
社団法人日本物理学会の論文
1992-03-15