Characterisation of the L-mode Scrape Off Layer in MAST: decay lengths

TL;DR

This paper provides a detailed characterization of the L-mode Scrape Off Layer in MAST, analyzing how plasma parameters affect the density profile and decay lengths using various diagnostics.

Contribution

It offers a comprehensive analysis of the SOL in MAST L-mode, highlighting the impact of density and other parameters on decay lengths and profile broadening.

Findings

Increased line averaged density broadens the midplane density profile.

The study confirms previous results on profile broadening with density.

Diagnostic data supports integrated understanding of SOL behavior.

Abstract

This work presents a detailed characterisation of the MAST Scrape Off Layer in L-mode. Scans in line averaged density, plasma current and toroidal magnetic field were performed. A comprehensive and integrated study of the SOL was allowed by the use of a wide range of diagnostics. In agreement with previous results, an increase of the line averaged density induced a broadening of the midplane density profile.