About: Collisionality dependent transport in TCV SOL plasmas

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Prezentujeme výsledky ze sondového měření na vnější středorovině okrajového plazmatu tokamaku TCV během experimentů s měnícím proudem plazmatu. Demonstrujeme, že zvyšováním proudu, a tedy zároveň zkracováním paralelní magnetických siločar, se radiální profil hustoty plazmatu rozšiřuje a úroveň fluktuací a turbulentní radiální transport se zvyšuje. Toto jasně osvětluje fakt, že radiální transport se zvyšuje se srážkovostí. Tato závislost na srážkovosti je v souladu s nedávnou teorií pohybu plazmatických kapek (blobů), elektricky oddělené od divertorových desek za vysoké srážkovosti. To zvyšuje radiální konvektivní transport and souvisí pravděpodobně s hustotním limitem. (cs) Results are presented from probe measurements at the outboard midplane scrape-off layer region of TCV current scan experiments. It is shown that with decreasing plasma current, or increasing magnetic connection length, the radial particle density profile becomes broader and the fluctuation levels and turbulence driven radial transport increases. This strongly indicates that plasma fluctuations and radial transport increases with plasma collisionality. Such collisionality dependence is consistent with a recent theory for radial blob motion, which suggests that filamentary structures become electrically disconnected from the target sheaths at large collisionality and thus experience less sheath dissipation. This increases the radial convective transport and is likely linked to the discharge density limit. Results are presented from probe measurements at the outboard midplane scrape-off layer region of TCV current scan experiments. It is shown that with decreasing plasma current, or increasing magnetic connection length, the radial particle density profile becomes broader and the fluctuation levels and turbulence driven radial transport increases. This strongly indicates that plasma fluctuations and radial transport increases with plasma collisionality. Such collisionality dependence is consistent with a recent theory for radial blob motion, which suggests that filamentary structures become electrically disconnected from the target sheaths at large collisionality and thus experience less sheath dissipation. This increases the radial convective transport and is likely linked to the discharge density limit. (en)
Title	Collisionality dependent transport in TCV SOL plasmas Collisionality dependent transport in TCV SOL plasmas (en) Radiální transport v závislosti na srážkovosti v okrajovém plazmatu tokamaku TCV (cs)
skos:prefLabel	Collisionality dependent transport in TCV SOL plasmas Collisionality dependent transport in TCV SOL plasmas (en) Radiální transport v závislosti na srážkovosti v okrajovém plazmatu tokamaku TCV (cs)
skos:notation	RIV/61389021:_____/07:00094134!RIV08-AV0-61389021
http://linked.open.../vavai/riv/strany	P;1.044;P;1.044
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(AV0Z20430508)
http://linked.open...vai/riv/dodaniDat	2008
http://linked.open...aciTvurceVysledku	Horáček, Jan
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky plazmatu AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	414106
http://linked.open...ai/riv/idVysledku	RIV/61389021:_____/07:00094134
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	tokamak; plasma; scrape-off layer; turbulence; interchange instability (en)
http://linked.open.../riv/klicoveSlovo	plasma tokamak turbulence interchange instability scrape-off layer
http://linked.open...ontrolniKodProRIV	[42CBD3721661]
http://linked.open...v/mistoKonaniAkce	Warsaw
http://linked.open...i/riv/mistoVydani	Warsaw
http://linked.open...i/riv/nazevZdroje	EPS Europhysics Conference Abstracts – Contributed papers
http://linked.open...in/vavai/riv/obor	BL
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...UplatneniVysledku	2007
http://linked.open...iv/tvurceVysledku	Horáček, Jan Naulin, V. Nielsen, A. H. Pitts, R. A. Rasmussen, J. J. Garcia, E. O. Madsen, J.
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2007-07-02 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Physical and chemical processes in plasmas and theis applications
number of pages	12 (xsd:int)
http://purl.org/ne...btex#hasPublisher	European Physical Society
https://schema.org/isbn	978-83-926290-0-9

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