About: Edge Plasma Physics and Relevant Diagnostics on the CASTOR tokamak

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We describe results of two sets of measurements performed with a full poloidal array of Langmuir probes located in the scrape-off layer (SOL) of the CASTOR tokamak. At first, a biased electrode is inserted into the SOL. The resulting poloidally localized electric field structures are identified by means of the ring of probes and a consequent modification of the convective transport is demonstrated. In the second experiment, the turbulent fluctuations are measured in standard ohmic discharges. The analysis of the probe signals reveals a spatially periodic mode with the poloidal mode number equal to the edge safety factor q, which propagates poloidally in the direction of the ErxB drift. This observation is interpreted as a signature of a single turbulent structure, which snakes around the torus several times following the local helicity of the magnetic field. We describe results of two sets of measurements performed with a full poloidal array of Langmuir probes located in the scrape-off layer (SOL) of the CASTOR tokamak. At first, a biased electrode is inserted into the SOL. The resulting poloidally localized electric field structures are identified by means of the ring of probes and a consequent modification of the convective transport is demonstrated. In the second experiment, the turbulent fluctuations are measured in standard ohmic discharges. The analysis of the probe signals reveals a spatially periodic mode with the poloidal mode number equal to the edge safety factor q, which propagates poloidally in the direction of the ErxB drift. This observation is interpreted as a signature of a single turbulent structure, which snakes around the torus several times following the local helicity of the magnetic field. (en) V příspěvku jsou prezentovány dva výsledky experimentů v okrajovém plazmatu tokamaku CASTOR. První případ popisuje polarizaci plazmatu pomocí elektrody, vytváření vnucených elektrických polí a vznik tzv. vodivých buněk. Druhý výsledek ukazuje prostorově periodický mód, pozorovaný v okrajové turbulenci. (cs)
Title	Edge Plasma Physics and Relevant Diagnostics on the CASTOR tokamak Fyzika okrajového plazmatu a odpovídající diagnostika na tokamaku CASTOR (cs) Edge Plasma Physics and Relevant Diagnostics on the CASTOR tokamak (en)
skos:prefLabel	Edge Plasma Physics and Relevant Diagnostics on the CASTOR tokamak Fyzika okrajového plazmatu a odpovídající diagnostika na tokamaku CASTOR (cs) Edge Plasma Physics and Relevant Diagnostics on the CASTOR tokamak (en)
skos:notation	RIV/61389021:_____/04:00029777!RIV06-GA0-61389021
http://linked.open.../vavai/riv/strany	1;6
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(GA202/03/0786), P(GP202/03/P062)
http://linked.open...iv/cisloPeriodika	-
http://linked.open...vai/riv/dodaniDat	2006
http://linked.open...aciTvurceVysledku	Stejskal, Pavel Pánek, Radomír Stöckel, Jan Hron, Martin Adámek, Jiří Ďuran, Ivan
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
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	561676
http://linked.open...ai/riv/idVysledku	RIV/61389021:_____/04:00029777
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	tokamak; edge plasma; probe diagnostics; biasing; turbulence; polarization (en)
http://linked.open.../riv/klicoveSlovo	probe diagnostics edge plasma tokamak turbulence polarization biasing
http://linked.open...odStatuVydavatele	DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV	[ACA0325011C6]
http://linked.open...i/riv/nazevZdroje	Schriften des Forschungszentrums Jülich
http://linked.open...in/vavai/riv/obor	BL
http://linked.open...ichTvurcuVysledku	6 (xsd:int)
http://linked.open...cetTvurcuVysledku	11 (xsd:int)
http://linked.open...vavai/riv/projekt	3D structure of the edge turbulence and its control on the Castor tokamak Modelling of specific processes in the edge plasma in tokamak
http://linked.open...UplatneniVysledku	2004
http://linked.open...v/svazekPeriodika	3
http://linked.open...iv/tvurceVysledku	Adámek, Jiří Gunn, J. Pánek, Radomír Stejskal, Pavel Stöckel, Jan Hron, Martin Ďuran, Ivan Martines, E. Bonhomme, G. Devynck, P. Van Oost, G.
issn	1433-5581
number of pages	6 (xsd:int)

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