Observation of Secondary Instability of 2/1 Magnetic Island in COMPASS High Density Limit Plasmas.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F16%3A00483193" target="_blank" >RIV/61389021:_____/16:00483193 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Observation of Secondary Instability of 2/1 Magnetic Island in COMPASS High Density Limit Plasmas.

Popis výsledku v původním jazyce

Density limit disruptions (DLDs) have been observed in high density tokamak plasmas. It is important to understand the dynamics of the DLDs so that better mitigation strategies can be developed. In this work, following detection in JET of a secondary instability (SI) to the m/n = 2/1 MHD mode in the precursor of DLD, we analyse the evolution of the magnetic island in COMPASS DLD to look for the presence of this SI just close to the onset of energy quench phase of the disruption. The presence of this SI was associated with the occurrence of minor disruptions preceding the major disruption and with the major disruption itself in [Salzedas, F., 2011]. The coherence observed between the perturbations caused by the SI in the magnetic poloidal flux and in the electron temperature was high, allowing to determine that the SI perturbations came from the same position as the magnetic island. In the work presented here, only the perturbations in the magnetic poloidal flux are analysed.

Název v anglickém jazyce

Observation of Secondary Instability of 2/1 Magnetic Island in COMPASS High Density Limit Plasmas.

Popis výsledku anglicky

Density limit disruptions (DLDs) have been observed in high density tokamak plasmas. It is important to understand the dynamics of the DLDs so that better mitigation strategies can be developed. In this work, following detection in JET of a secondary instability (SI) to the m/n = 2/1 MHD mode in the precursor of DLD, we analyse the evolution of the magnetic island in COMPASS DLD to look for the presence of this SI just close to the onset of energy quench phase of the disruption. The presence of this SI was associated with the occurrence of minor disruptions preceding the major disruption and with the major disruption itself in [Salzedas, F., 2011]. The coherence observed between the perturbations caused by the SI in the magnetic poloidal flux and in the electron temperature was high, allowing to determine that the SI perturbations came from the same position as the magnetic island. In the work presented here, only the perturbations in the magnetic poloidal flux are analysed.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/LM2015045" target="_blank" >LM2015045: COMPASS – Tokamak pro výzkum termonukleární fúze</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

EPS 2016: 43rd European Physical Society Conference on Plasma Physics

ISBN

2-914771-99-1

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

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Název nakladatele

European Physical Society

Místo vydání

Mulhouse

Místo konání akce

Leuven

Datum konání akce

4. 7. 2016

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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