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Integration of a radiative divertor for heat load control into JET high triangularity ELMy H-mode plasmas
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2012 (English)In: Nuclear Fusion, ISSN 0029-5515, E-ISSN 1741-4326, Vol. 52, no 6, 063022- p.Article in journal (Refereed) Published
Abstract [en]

Experiments on JET with a carbon-fibre composite wall have explored the reduction of steady-state power load in an ELMy H-mode scenario at high Greenwald fraction similar to 0.8, constant power and close to the L to H transition. This paper reports a systematic study of power load reduction due to the effect of fuelling in combination with seeding over a wide range of pedestal density ((4-8) x 10(19) m(-3)) with detailed documentation of divertor, pedestal and main plasma conditions, as well as a comparative study of two extrinsic impurity nitrogen and neon. It also reports the impact of steady-state power load reduction on the overall plasma behaviour, as well as possible control parameters to increase fuel purity. Conditions from attached to fully detached divertor were obtained during this study. These experiments provide reference plasmas for comparison with a future JET Be first wall and an all W divertor where the power load reduction is mandatory for operation.

Place, publisher, year, edition, pages
2012. Vol. 52, no 6, 063022- p.
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-98944DOI: 10.1088/0029-5515/52/6/063022ISI: 000305091200026Scopus ID: 2-s2.0-84862002071OAI: oai:DiVA.org:kth-98944DiVA: diva2:541001
Note
QC 20120713Available from: 2012-07-13 Created: 2012-07-05 Last updated: 2017-12-07Bibliographically approved

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Frassinetti, Lorenzo

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