Interchange Driven Turbulence and Bellan Instability in Tokamak Scrape-off Layer

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Interchange Driven Turbulence and Bellan Instability in Tokamak Scrape-off Layer

Popis výsledku v původním jazyce

We present description of an electrostatic turbulent model ESEL and explain interchange mechanism leading to turbulence generation in tokamak scrape-off layer. After introducing theory of Bellan instability, threshold for particle detrapping from turbulent structures (blobs) due to their finite Larmor orbits is discussed for the case of turbulence simulated by the ESEL model. Since plasma potential as well as floating potential are available from the simulation, it is possible to evaluate error made byusing experimentally obtained floating potential in simulations of particle diffusion. It is shown that due to bipolar nature of blobs the outflow of particles from the blob caused by Bellan instability can be, in certain conditions, asymmetric and localized mainly into its upper and inner boundary.

Název v anglickém jazyce

Interchange Driven Turbulence and Bellan Instability in Tokamak Scrape-off Layer

Popis výsledku anglicky

We present description of an electrostatic turbulent model ESEL and explain interchange mechanism leading to turbulence generation in tokamak scrape-off layer. After introducing theory of Bellan instability, threshold for particle detrapping from turbulent structures (blobs) due to their finite Larmor orbits is discussed for the case of turbulence simulated by the ESEL model. Since plasma potential as well as floating potential are available from the simulation, it is possible to evaluate error made byusing experimentally obtained floating potential in simulations of particle diffusion. It is shown that due to bipolar nature of blobs the outflow of particles from the blob caused by Bellan instability can be, in certain conditions, asymmetric and localized mainly into its upper and inner boundary.

Druh

D - Stať ve sborníku

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

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

Název statě ve sborníku

WDS'09 Proceedings of Contributed Papers

ISBN

978-80-7378-103-3

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

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Název nakladatele

Matfyzpress

Místo vydání

Prague

Místo konání akce

Prague

Datum konání akce

2. 6. 2009

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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