Study 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_____%2F17%3A00482424" target="_blank" >RIV/61389021:_____/17:00482424 - 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

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

Popis výsledku v původním jazyce

For generating fusion power, high plasma density is indispensable for reactor tokamaks but it may lead to the density limit disruption (DLD). The physical mechanisms behind the underlying processes of DLD are only partially understood. The growing MHD instabilities are often regarded as precursors to DLD. A secondary instability to the rotating (2,1) magnetic island was observed prior to the thermal quench, when the amplitude of the magnetic island is large and its rotation frequency is low, first in JET and then in COMPASS tokamaks.nThe secondary instability is characterized by small amplitude perturbations, with no m or n mode numbers, superimposed on the perturbations of the precursor magnetic island. The frequency of the SI is higher than the rotating frequency of the island itself.nThe presented work focuses on the study of the SI behaviour in the period preceding the thermal quench. n

Název v anglickém jazyce

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

Popis výsledku anglicky

For generating fusion power, high plasma density is indispensable for reactor tokamaks but it may lead to the density limit disruption (DLD). The physical mechanisms behind the underlying processes of DLD are only partially understood. The growing MHD instabilities are often regarded as precursors to DLD. A secondary instability to the rotating (2,1) magnetic island was observed prior to the thermal quench, when the amplitude of the magnetic island is large and its rotation frequency is low, first in JET and then in COMPASS tokamaks.nThe secondary instability is characterized by small amplitude perturbations, with no m or n mode numbers, superimposed on the perturbations of the precursor magnetic island. The frequency of the SI is higher than the rotating frequency of the island itself.nThe presented work focuses on the study of the SI behaviour in the period preceding the thermal quench. n

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

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

EPS 2017: 44th European Physical Society Conference on Plasma Physics

ISBN

979-10-96389-07

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

Belfast

Datum konání akce

26. 6. 2017

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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