Ion energy measurements on MAST using a midplane RFEA
Abstract
Ion energy measurements have been made in the scrape off layer of the Mega Amp Spherical Tokamak (MAST) using a midplane retarding field energy analyser (RFEA) in H-mode plasmas during the inter-edge localised mode (ELM) period and during type I and type III ELMs. During the inter-ELM period at distances of 3 to 8 cm from the last closed flux surface (LCFS), ion temperatures of 20 to 70 eV have been measured giving an ion to electron temperature ratio of 2 to 7 with a mean of 4. During type III ELMs, an ion temperature of 50 eV has been measured 3 to 6 cm from the LCFS which decreases to 30 eV at distances 11 to 16 cm from the LCFS. During type I ELMs, an ion temperature of 40 eV has been measured at a distance of 10 to 15 cm from the LCFS.
Cite
@article{arxiv.1306.6505,
title = {Ion energy measurements on MAST using a midplane RFEA},
author = {S. Y. Allan and S. Elmore and A. Kirk and M. Kočan and P. Tamain},
journal= {arXiv preprint arXiv:1306.6505},
year = {2013}
}
Comments
15 pages, 5 figures