Aspect ratio scaling of the Single Helical states in the Reversed Field Pinch plasmas

TL;DR

This paper introduces a new model predicting how the aspect ratio influences the toroidal mode number of Single Helicity states in Reversed Field Pinch plasmas, emphasizing electromagnetic interactions and plasma stability.

Contribution

It presents a novel predictive model linking aspect ratio to mode number in RFP plasmas based on electromagnetic and stability considerations.

Findings

Model successfully predicts aspect ratio scaling laws.

Highlights importance of electromagnetic interactions in mode selection.

Stability analysis is crucial for understanding mode emergence.

Abstract

In this paper a new idea is presented which is able to predict the scaling law with the aspect ratio for the toroidal mode number of the so called Single Helicity states in Reversed Field Pinch plasmas. The model starts considering the pure electromagnetic interaction of an helical current with a conductive toroidal shell. The stability properties of the plasma become then essential in determining the emergence of the observed dominant mode.