Impurity transport in temperature gradient driven turbulence

@article{Skyman2012ImpurityTI,
  title={Impurity transport in temperature gradient driven turbulence},
  author={Andreas Skyman and Hans Nordman and P{\"a}r Strand},
  journal={Physics of Plasmas},
  year={2012},
  volume={19},
  pages={032313}
}
In the present paper, the transport of impurities driven by trapped electron (TE) mode turbulence is studied. Non-linear (NL) gyrokinetic simulations using the code GENE are compared with results from quasilinear (QL) gyrokinetic simulations and a computationally efficient fluid model. The main focus is on model comparisons for electron temperature gradient driven turbulence regarding the sign of the convective impurity velocity (pinch) and the impurity density gradient R/LnZ (peaking factor… 

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References

SHOWING 1-10 OF 94 REFERENCES
Fluid and gyrokinetic simulations of impurity transport at JET
Impurity transport coefficients due to ion-temperature-gradient (ITG) mode and trapped-electron mode turbulence are calculated using profile data from dedicated impurity injection experiments at JET.
Influence of magnetic shear on impurity transport
The magnetic shear dependence of impurity transport in tokamaks is studied using a quasilinear fluid model for ion temperature gradient (ITG) and trapped electron (TE) mode driven turbulence in the
Impurity transport driven by ion temperature gradient turbulence in tokamak plasmas
Impurity transport driven by electrostatic turbulence is analyzed in weakly collisional tokamak plasmas using a semianalytical model based on a boundary layer solution of the gyrokinetic equation.
Turbulent and neoclassical impurity transport in tokamak plasmas
Impurity particle transport in tokamaks is studied using an electrostatic fluid model for main ion and impurity temperature gradient (ITG) mode and trapped electron (TE) mode turbulence in the
Gyrokinetic simulations of ion and impurity transport
A systematic study of turbulent particle and energy transport in both pure and multicomponent plasmas is presented. In this study, gyrokinetic results from the GYRO code [J. Candy and R. E. Waltz, J.
Anomalous diffusion, clustering, and pinch of impurities in plasma edge turbulence
The turbulent transport of impurity particles in plasma edge turbulence is investigated. The impurities are modeled as a passive fluid advected by the electric and polarization drifts, while the
Impurity effects on ηi mode stability and transport
The effects of an impurity ion species on the linear stability of the toroidal ion temperature gradient driven mode (ηi mode) are investigated together with the scaling properties of the
Electromagnetic effects on trace impurity transport in tokamak plasmas
The impact of electromagnetic effects on the transport of light and heavy impurities in tokamak plasmas is investigated by means of an extensive set of linear gyrokinetic numerical calculations with
Influence of the radio frequency ponderomotive force on anomalous impurity transport in tokamaks
Trace impurity transport in tokamaks is studied using an electrostatic, collisionless fluid model for ion-temperature-gradient and trapped-electron mode driven turbulence in the presence of radio
Electron temperature gradient driven turbulence
Collisionless electron-temperature-gradient-driven (ETG) turbulence in toroidal geometry is studied via nonlinear numerical simulations. To this aim, two massively parallel, fully gyrokinetic Vlasov
...
...