Dynamika turbulentního transportu ve scrape-off layer tokamaku CASTOR

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F06%3A00042998" target="_blank" >RIV/61389021:_____/06:00042998 - 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

Dynamics of turbulent transport in the scrape-off layer of the CASTOR tokamak

Popis výsledku v původním jazyce

In this paper the propagation of turbulent events along radial and poloidal probe arrays in the scrape-off-layer (SOL) of the tokamak CASTOR [ Hron M et al 1999 Czech. J. Phys. 49 181] is observed using a novel correlation technique. The typical turbulent structures appear as dipoles on the floating potential signals and as positive bursts on the density. It is found that both dipoles and density bursts propagate over long radial distances in the SOL while propagating poloidally. The comparison of the measured velocities of the potential and density fluctuations shows that the density structures move radially faster than the potential ones. This allows to understand how the density is convected by the turbulence. The density moves radially along the potential valleys created by the poloidal dipoles without modifying them. In the framework of an interchange turbulence, this property indicates that charge exchange collisions with neutrals in the SOL of CASTOR lead to a high viscosity.

Název v anglickém jazyce

Dynamics of turbulent transport in the scrape-off layer of the CASTOR tokamak

Popis výsledku anglicky

In this paper the propagation of turbulent events along radial and poloidal probe arrays in the scrape-off-layer (SOL) of the tokamak CASTOR [ Hron M et al 1999 Czech. J. Phys. 49 181] is observed using a novel correlation technique. The typical turbulent structures appear as dipoles on the floating potential signals and as positive bursts on the density. It is found that both dipoles and density bursts propagate over long radial distances in the SOL while propagating poloidally. The comparison of the measured velocities of the potential and density fluctuations shows that the density structures move radially faster than the potential ones. This allows to understand how the density is convected by the turbulence. The density moves radially along the potential valleys created by the poloidal dipoles without modifying them. In the framework of an interchange turbulence, this property indicates that charge exchange collisions with neutrals in the SOL of CASTOR lead to a high viscosity.

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/GA202%2F03%2F0789" target="_blank" >GA202/03/0789: Nové křemíkové nanomateriály pro optoelektroniku</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

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

Název periodika

Physics of Plasmas

ISSN

1070-664X

e-ISSN

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Svazek periodika

13

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

102505-102513

Kód UT WoS článku

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EID výsledku v databázi Scopus

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