Implications of X-point lobe structures due to resonant magnetic perturbations on MAST

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Implications of X-point lobe structures due to resonant magnetic perturbations on MAST

Popis výsledku v původním jazyce

In order to assess the effectiveness of RMPs in mitigating the divertor power loading due to type I ELMs, experiments were performed on MAST using a set of 18 RMP coils. These have allowed ELM mitigation to be established in plasmas by applying fields with toroidal mode numbers n = 3, 4 or 6. Coincident with the effect of RMPs on the ELMs, for the first time, clear lobe structures have been observed to form near the x-point. These lobes, or manifold structures, have been predicted previously, and theseobservations are the first detailed measurements of their spatial structure in a range of plasma and RMP configurations. The appearance of the lobes is correlated with the effect of the RMPs on the plasma, which is manifest as a density pump out or an increase in ELM frequency, but form at a different ELM coil current threshold than for ELM mitigation.

Název v anglickém jazyce

Implications of X-point lobe structures due to resonant magnetic perturbations on MAST

Popis výsledku anglicky

In order to assess the effectiveness of RMPs in mitigating the divertor power loading due to type I ELMs, experiments were performed on MAST using a set of 18 RMP coils. These have allowed ELM mitigation to be established in plasmas by applying fields with toroidal mode numbers n = 3, 4 or 6. Coincident with the effect of RMPs on the ELMs, for the first time, clear lobe structures have been observed to form near the x-point. These lobes, or manifold structures, have been predicted previously, and theseobservations are the first detailed measurements of their spatial structure in a range of plasma and RMP configurations. The appearance of the lobes is correlated with the effect of the RMPs on the plasma, which is manifest as a density pump out or an increase in ELM frequency, but form at a different ELM coil current threshold than for ELM mitigation.

Druh

D - Stať ve sborníku

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

EPS Europhysics Conference Abstracts Volume 36F ? Contributed papers

ISBN

2-914771-79-7

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

"O2.104"-"O2.104"

Název nakladatele

European Physical Society

Místo vydání

Mulhouse

Místo konání akce

Stockholm

Datum konání akce

2. 7. 2012

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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