ELM mitigation via rotating resonant magnetic perturbations on MAST

0454107 - ÚFP 2016 RIV NL eng J - Journal Article
Thornton, A.J. - Kirk, A. - Cahyna, Pavel - Chapman, I.T. - Fishpool, G. - Harrison, J.R. - Liu, Y.Q. - Kripner, Lukáš - Peterka, Matěj
ELM mitigation via rotating resonant magnetic perturbations on MAST.
Journal of Nuclear Materials. Roč. 463, August (2015), s. 723-726. ISSN 0022-3115. E-ISSN 1873-4820.
[PLASMA-SURFACE INTERACTIONS 21: International Conference on Plasma-Surface Interactions in Controlled Fusion Devices. Kanazawa, 26.05.2014-30.05.2014]
R&D Projects: GA ČR GAP205/11/2341
Institutional support: RVO:61389021
Keywords : edge localised mode * resonant magnetic perturbation * MAST
OECD category: Nuclear related engineering
Impact factor: 2.199, year: 2015
http://www.sciencedirect.com/science/article/pii/S0022311514006795

The application of resonant magnetic perturbations (RMPs) produces splitting of the divertor strike point due to the interaction of the RMP field and the plasma field. The application of a rotating RMP field causes the strike point splitting to rotate, distributing the particle and heat flux evenly over the divertor. The RMP coils in MAST have been used to generate a rotating perturbation with a toroidal mode number n = 3. The ELM frequency is doubled with the application of the RMP rotating field, whilst maintaining the H mode. During mitigation, the ELM peak heat flux is seen to be reduced by 50% for a halving in the ELM energy and motion of the strike point, consistent with the rotation of the applied RMP field, is seen using high spatial resolution (1.5 mm at the target) heat flux profiles measured using infrared (IR) thermography
Permanent Link: http://hdl.handle.net/11104/0254804