Effects of collisions on impurity transport driven by electrostatic modes

@article{Buller2020EffectsOC,
  title={Effects of collisions on impurity transport driven by electrostatic modes},
  author={S. Buller and Per Helander},
  journal={Journal of Plasma Physics},
  year={2020},
  volume={86}
}
The turbulence-induced quasi-linear particle flux of a highly charged, collisional impurity species is calculated from the electrostatic gyrokinetic equation including collisions with the bulk ions and the impurities themselves. The equation is solved by an expansion in powers of the impurity charge number $Z$. In this formalism, the collision operator only affects the impurity flux through the dynamics of the impurities in the direction parallel to the magnetic field. At reactor-relevant… 

Turbulent impurity transport simulations in Wendelstein 7-X plasmas

A study of turbulent impurity transport by means of quasilinear and nonlinear gyrokinetic simulations is presented for Wendelstein 7-X (W7-X). The calculations have been carried out with the recently

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