Critical roles of edge turbulent transport in the formation of high-field-side high-density front and density limit disruption in J-TEXT tokamak

TL;DR

This paper investigates how edge turbulent transport influences the formation of high-density fronts and triggers density limit disruptions in J-TEXT tokamak plasmas, using diagnostic tools to analyze boundary phenomena.

Contribution

It provides new insights into the role of boundary turbulence and high-field-side density fronts in the disruption process, highlighting their significance in plasma stability.

Findings

Edge turbulent transport is critical in forming high-density fronts.

High-field-side high-density front precedes density limit disruptions.

Diagnostics reveal boundary turbulence's impact on plasma stability.

Abstract

This article presents an in-depth study of the sequence of events leading to density limit disruption in J-TEXT tokamak plasmas, with an emphasis on boudary turbulent transport and the high-field-side high-density (HFSHD) front. These phenomena were extensively investigated by using Langmuir probe and Polarimeter-interferometer diagnostics.