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Fluid models of impurity transport via drift wave turbulence
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Image of FIG. 1.
FIG. 1.

The density profiles and inverse density gradient scale lengths of boron during an H-mode of the Alcator C-Mod tokamak. (a) Measurement of density profile (solid circles) and the inverse gradient scale length of density. (b) The measurement of electron density profile (solid circles) and the data fit (solid line). Typical error bars are indicated (Ref. 12).

Image of FIG. 2.
FIG. 2.

Real frequency and the growth rate of the system of (solid lines) collisional and (dotted lines) trapped electron drift waves at .

Image of FIG. 3.
FIG. 3.

Phase shifts in radians with between hydrogenic ion, impurity, and electron densities and the electrostatic potential fluctuations as a function of . (a) , (b) , and (c) of trapped electron mode.

Image of FIG. 4.
FIG. 4.

Quasilinear fluxes of boron (B) for (a) hollow impurity density profile , (b) peaked impurity density profile , and (c) peaked impurity density profile case of trapped electron mode. The unit of the flux is .

Image of FIG. 5.
FIG. 5.

Simulation of density (solid line) and density (dashed-dotted line) compared with the measured density . (dashed line) required in the simulation is plotted on the right axis.

Image of FIG. 6.
FIG. 6.

Quasilinear fluxes of boron (B) as dependence of impurity density length for (a) and (b) . The unit of the flux is .

Image of FIG. 7.
FIG. 7.

Quasilinear flux as a function of . (a) Peaked impurity density profile and (b) hollow impurity density profile .

Image of FIG. 8.
FIG. 8.

Comparison of quasilinear flux of boron and argon as a function of . (a) peaking profile and (b) hollow profile .


Generic image for table
Table I.

Typical Alcator C-Mod tokamak plasma parameters.


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Scitation: Fluid models of impurity transport via drift wave turbulence