The effect of resonant magnetic perturbations on the divertor heat and particle fluxes in MAST

0434797 - ÚFP 2015 RIV AT eng J - Journal Article
Thornton, A.J. - Kirk, A. - Cahyna, Pavel - Chapman, I.T. - Harrison, J.R. - Liu, Y. … Total 7 authors
The effect of resonant magnetic perturbations on the divertor heat and particle fluxes in MAST.
Nuclear Fusion. Roč. 54, č. 6 (2014), 064011-064011. ISSN 0029-5515. E-ISSN 1741-4326.
[International Workshop on Stochasticity in Fusion Plasmas /6./. Jülich, 18.03.2013-20.03.2013]
R&D Projects: GA ČR GAP205/11/2341
Institutional support: RVO:61389021
Keywords : divertor * edge localized mode * resonant magnetic perturbation
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 3.062, year: 2014
http://iopscience.iop.org/0029-5515/54/6/064011/pdf/0029-5515_54_6_064011.pdf

This paper discusses the application of resonant magnetic perturbations (RMPs) as a mechanism for ELM control on Mega Amp Spherical Tokamak (MAST). Experiments have been performed using an n = 3 toroidal mode number perturbation and measurements of the strike point splitting performed. The measurements have been made using both infrared and visible imaging to measure the heat and particle flux to the divertor. The measured profiles have shown clear splitting in L-mode which compares well with the predication of the splitting location from modelling including the effect of screening. The splitting of the strike point has also been studied as a function of time during the ELM. The splitting varies during the ELM, being the strongest at the time of the peak heat flux and becoming more filamentary at the end of the ELM (200 µs after the peak midplane Dα emission). Variation in the splitting profiles has also been seen, with some ELMs showing clear splitting and others no splitting.
Permanent Link: http://hdl.handle.net/11104/0238796