Effect of external perturbation fields on divertor particle and heat loads during ELMs at JET

Peak heat fluxes arriving at the JET-divertor during Type-I ELMs have been successfully reduced by applying externally magnetic perturbation fields. The ELM-frequency in these plasmas strongly increases, leading to smaller ELM-size. The concomitant density losses, known as pump-out effect, have been recovered using inboard divertor gas fuelling, albeit with a degradation of the energy confinement. Langmuir probe analysis has shown that the magnetic perturbation drastically reduces the ELM-peak heat flux mostly via a reduction in particle flux, but at the price of higher inter-ELM fluxes. (C) 2009 Elsevier B.V. All rights reserved.


Published in:
Journal of Nuclear Materials, 390-391, 768-772
Presented at:
18th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices, Toledo, Spain, May 26-30, 2008
Year:
2009
Publisher:
Elsevier
ISSN:
0022-3115
ISBN:
0022-3115
Keywords:
Laboratories:
SPC
CRPP




 Record created 2010-05-19, last modified 2018-09-13


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