In-Out impurity density asymmetry due to the Coriolis force in a rotating tokamak plasma

TL;DR

This paper investigates how the Coriolis force influences impurity density asymmetry in rotating tokamak plasmas, providing a theoretical explanation consistent with experimental observations from ASDEX Upgrade.

Contribution

It introduces a new theoretical framework linking the Coriolis force to impurity asymmetry, aligning with experimental data.

Findings

Coriolis force induces in-out impurity density asymmetry.

Theoretical results match ASDEX Upgrade experimental observations.

Abstract

The effect of the Coriolis force due to the impurity toroidal and poloidal rotation on the in-out impurity density asymmetry in a rotating tokamak plasma is identified. The in-out impurity density asymmetry can be induced by the Coriolis force with q*v_theta_z*omega_z, in this case, when moving along the magnetic field line from the outboard side to the inboard side in a magnetic flux surface, one sees a positive Coriolis force. The proposed theory is consistent with the ASDEX Upgrade experimental observations.