Contribution of the Hall effect to radial electric field and spontaneous/intrinsic rotation in tokamak core plasmas

TL;DR

This paper investigates how the Hall effect influences the negative radial electric field and spontaneous rotation in tokamak core plasmas, proposing a simple evaluation method and emphasizing the importance of two-fluid MHD models.

Contribution

It introduces a straightforward approach to estimate the Hall effect's role in tokamak plasma behavior using experimental data, highlighting the significance of two-fluid magnetohydrodynamics.

Findings

Hall effect significantly contributes to negative radial electric field

The proposed method aligns with experimental data from TM-4 and T-10 tokamaks

Two-fluid MHD framework is essential for accurate plasma modeling

Abstract

The Hall effect, defined as the separation of electric charges of opposite sign when they move in a magnetic field, is suggested to contribute substantially to the observed negative radial electric field Er in the core plasma in tokamaks and, respectively, to the spontaneous/intrinsic rotation of plasma. A simple way to evaluate the Hall effect contribution to the Er value, using the independently measured space distributions of magnetic field and plasma rotation velocity, is suggested. The estimates of the effect for experimental data from the TM-4 and T-10 tokamaks suggest that the above phenomena in tokamaks should be described in the framework of the two-fluid magnetohydrodynamics.