Understanding edge-localized mode mitigation by resonant magnetic perturbations on MAST

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F13%3A00392034" target="_blank" >RIV/61389021:_____/13:00392034 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/0029-5515/53/4/043007" target="_blank" >http://dx.doi.org/10.1088/0029-5515/53/4/043007</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0029-5515/53/4/043007" target="_blank" >10.1088/0029-5515/53/4/043007</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Understanding edge-localized mode mitigation by resonant magnetic perturbations on MAST

Popis výsledku v původním jazyce

Sustained edge-localized mode (ELM) mitigation has been achieved using resonant magnetic perturbations (RMPs) on MAST. The ELM frequency increases by up to a factor of eight with a similar reduction in energy loss. A threshold current is observed above which the ELM frequency increases approximately linearly with current in the coils. A comparison of the filament structures observed during the ELMs in the natural and mitigated stages shows that the mitigated ELMs have the characteristics of type I ELMseven though their frequency is higher, their energy loss is reduced and the pedestal pressure gradient is decreased. During the ELM mitigated stage clear lobe structures are observed in visible-light imaging of the X-point region. The size of these lobesis correlated with the increase in ELM frequency observed. The RMPs produce a clear 3D distortion to the plasma and it is likely that these distortions explain why ELMs are destabilized and hence why ELM mitigation occurs.

Název v anglickém jazyce

Understanding edge-localized mode mitigation by resonant magnetic perturbations on MAST

Popis výsledku anglicky

Sustained edge-localized mode (ELM) mitigation has been achieved using resonant magnetic perturbations (RMPs) on MAST. The ELM frequency increases by up to a factor of eight with a similar reduction in energy loss. A threshold current is observed above which the ELM frequency increases approximately linearly with current in the coils. A comparison of the filament structures observed during the ELMs in the natural and mitigated stages shows that the mitigated ELMs have the characteristics of type I ELMseven though their frequency is higher, their energy loss is reduced and the pedestal pressure gradient is decreased. During the ELM mitigated stage clear lobe structures are observed in visible-light imaging of the X-point region. The size of these lobesis correlated with the increase in ELM frequency observed. The RMPs produce a clear 3D distortion to the plasma and it is likely that these distortions explain why ELMs are destabilized and hence why ELM mitigation occurs.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

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Projekt

<a href="/cs/project/GAP205%2F11%2F2341" target="_blank" >GAP205/11/2341: Kontrola okrajových nestabilit plazmatu v tokamacích pomocí vnějších magnetických poruch</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Nuclear Fusion

ISSN

0029-5515

e-ISSN

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Svazek periodika

53

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

AT - Rakouská republika

Počet stran výsledku

11

Strana od-do

043007-043007

Kód UT WoS článku

000316049300008

EID výsledku v databázi Scopus

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