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- W1535245890 abstract "We present numerical results of a 1-D (poloidal), time dependent code for the description of ion impurity transport on a given tokamak magnetic surface, in the presence of momentum sources such that, as observed in neutral beam injection experiments, the toroidal rotation velocities be comparable to or larger than the impurity thermal speed. We show that the densities, the velocities and the ambipolar potential reach a quasi steady state characterized by significant poloidal gradients, on a time scale of the order of the collision time, i.e. faster than the radial diffusion scale. To obtain this steady state a phenomenological drag force needs be introduced; we find that a purely classical, gyroviscous force alone is apparently insufficient to obtain a steady state, within the framework of the present model which retains only the zero-th order, in the Larmor radius expansion, ion-impurity friction." @default.
- W1535245890 created "2016-06-24" @default.
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- W1535245890 date "1988-03-01" @default.
- W1535245890 modified "2023-10-13" @default.
- W1535245890 title "Evolution of poloidal variation of impurity density and ambipolar potential in rotating tokamak plasma: Part 2" @default.
- W1535245890 cites W1651427691 @default.
- W1535245890 doi "https://doi.org/10.2172/5045968" @default.
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