New experimental findings of non-local transport in J-TEXT plasmas

TL;DR

This paper reports new experimental observations in J-TEXT plasmas showing non-local transport phenomena, including rapid core temperature and density rises and increased toroidal rotation, suggesting turbulence spreading as a key mechanism.

Contribution

It provides novel experimental evidence of non-local transport effects and proposes turbulence spreading as a potential underlying mechanism.

Findings

Rapid electron temperature increases in the core

Steep rises in inner density during cold pulses

Acceleration of core toroidal rotation

Abstract

In the cold pulse experiments in J-TEXT, not only are the rapid electron temperature increases in core observed, but also the steep rises of inner density are found. Moreover, the core toroidal rotation is also accelerated during the non-local transport process of electron temperature. These new findings of cold pulse experiments in J-TEXT reveal that turbulence spreading is the possible mechanism for the non-local transport dynamics.