Scrape off layer heat transport and divertor power deposition of pellet induced ELMs

R. P. Wenninger, T. H. Eich, G. T.A. Huysmans, P. T. Lang, S. Devaux, S. Jachmich, F. Kochl

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We recall that the ultimate goal of inducing ELMs by pellets is the reduction of the deteriorating effect of the ELMs on the plasma facing components [9]. In the light of this the striking feature of pellet induced ELMs to cause an asymmetric divertor power load deserves particular attention. In the simulation the toroidal variation of the maximum power flux density is 66% for the total deposition. In qualitative comparison the experiment with asymmetric component in the IR-view the peak heat flux of pellet induced ELMs is found to be considerably larger than for spontaneous ELMs. It is not clear, if the asymmetric component is of similar extent for ELMs induced by pellets injected from the high field side, or ELMs induced by smaller pellets and how it scales with major radius. Consequently it can not be excluded that pellet injection at fixed q95 in next step fusion devices such as ITER causes considerable toroidaly localised enhanced divertor degradation.

Original languageEnglish
Title of host publication38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts
Pages1600-1603
Number of pages4
Publication statusPublished - 2011
Event38th EPS Conference on Plasma Physics 2011, EPS 2011 - Strasbourg, France
Duration: 27 Jun 20111 Jul 2011

Publication series

Name38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts
Volume35 2

Conference

Conference38th EPS Conference on Plasma Physics 2011, EPS 2011
Country/TerritoryFrance
CityStrasbourg
Period27/06/111/07/11

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