Scrape-off layer ion temperature measurements at the divertor target in MAST by retarding field energy analyser

TL;DR

This paper presents novel measurements of ion temperature at the divertor target in MAST using a retarding field energy analyser, providing valuable data for understanding heat fluxes in fusion plasmas.

Contribution

It introduces a new application of RFEA for Ti measurements at the divertor target in MAST, filling a gap in existing plasma diagnostic data.

Findings

First Ti measurements at the divertor target in MAST during inter-ELM H-mode.

Demonstrates the effectiveness of RFEA for ion temperature diagnostics in fusion devices.

Provides data to improve heat flux modeling in tokamak divertors.

Abstract

Knowledge of the ion temperature (Ti) is of key importance for determining heat fluxes to the divertor and plasma facing components, however data regarding this is limited compared to electron temperature (Te) data. Ti measurements at the divertor target, between edge-localised modes (inter-ELM) H-mode, have been made using a novel retarding field energy analyser (RFEA).