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

Result code in 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>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

Dynamika turbulentního transportu ve scrape-off layer tokamaku CASTOR

Czech description

V této práci je popsáno radiální šíření turbulentních struktur ve scrape-off-layer tokamaku CASTOR pomocí nové korelační techniky. Porovnáním raidiálních rychlostí potenciálových a hustotních struktur získáme obrázek, kterak je hustota vedena turbulencemi napříč potenciálovým strukturám. Tyto vlastnosti naznačují, že charge-interchange srážky s neutrálními atomy v SOL tokamaku CASTOR vedou k vysoké viskozitě, která utlumuje zonální toky (zonal flows).

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BL - Plasma physics and discharge through gases

OECD FORD branch

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Project

<a href="/en/project/GA202%2F03%2F0789" target="_blank" >GA202/03/0789: New silicon nanomaterials for optoelectronics</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2006

Confidentiality

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

Name of the periodical

Physics of Plasmas

ISSN

1070-664X

e-ISSN

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Volume of the periodical

13

Issue of the periodical within the volume

10

Country of publishing house

US - UNITED STATES

Number of pages

9

Pages from-to

102505-102513

UT code for WoS article

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EID of the result in the Scopus database

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