Comment on the vortices of the early phase of the ELMs

TL;DR

This paper explores the transition process from sheared poloidal rotation to filament formation in H-mode plasmas, proposing a perspective on how vortices may serve as precursors to Edge Localized Modes (ELMs).

Contribution

It offers a new perspective on the vortex dynamics involved in the early phase of ELMs, highlighting the transition from shear flows to filamentary structures.

Findings

Vortices may act as precursors to ELMs.

Transition from sheared flow to filament formation is significant.

Vorticity and current density concentrate in filaments.

Abstract

We discuss a possible perspective on the process of transition from the layer of sheared poloidal rotation in the H-mode to a set of discrete filaments that concentrate vorticity and current density. They may be precursors of the Edge Localized Modes.