Dynamics of the edge transport barrier at plasma biasing on the CASTOR tokamak

Stöckel, Jan; Spolaore, M.; Peleman, P.; Brotánková, Jana; Horáček, Jan; Dejarnac, Renaud; Devynck, P.; Ďuran, Ivan; Gunn, J. P.; Hron, Martin; Kocan, M.; Martines, E.; Pánek, Radomír; Sharma, A.; Van Oost, G.

Number of the records: 1

Dynamics of the edge transport barrier at plasma biasing on the CASTOR tokamak

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SYSNO ASEP	0079077
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Ostatní články
Title	Dynamics of the edge transport barrier at plasma biasing on the CASTOR tokamak
Title	Dynamika okrajové transportní bariéry při nabíjení plazmatu na tokamaku CASTOR
Author(s)	Stöckel, Jan (UFP-V)_RID Spolaore, M. (IT) Peleman, P. (BE) Brotánková, Jana (UFP-V) Horáček, Jan (UFP-V)_{RID, ORCID} Dejarnac, Renaud (UFP-V)_{RID, ORCID} Devynck, P. (FR) Ďuran, Ivan (UFP-V)_{RID, ORCID} Gunn, J. P. (FR) Hron, Martin (UFP-V)_{RID, ORCID} Kocan, M. (SK) Martines, E. (IT) Pánek, Radomír (UFP-V)_RID Sharma, A. (NO) Van Oost, G. (BE)
Source Title	Problems of Atomic Science and Technology - ISSN 1562-6016 Roč. 12, č. 6 (2006), s. 19-23
Number of pages	6 s.
Action	International Conference on Plasma Physics and Technology/11th./
Event date	11.9.2006-16.9.2006
VEvent location	Alushta
Country	UA - Ukraine
Event type	WRD
Language	eng - English
Country	UA - Ukraine
Keywords	tokamak ; plasma ; transport barrier ; relaxations
Subject RIV	BL - Plasma and Gas Discharge Physics
CEZ	AV0Z20430508 - UFP-V (2005-2011)
Annotation	A clear and reproducible transition to a regime with an improved particle confinement is routinely observed on the CASTOR tokamak, if the biasing electrode is inserted deep enough into the plasma (r/a ~ 0.5) and biased up to +250V. The steepening of the radial profiles of the plasma density and potential demonstrate the formation of a transport barrier just inside the last closed flux surface. Fast relaxations of the edge plasma parameters, with a frequency of about 10 kHz, are observed when the average radial electric field within the barrier prevailes values of about 20 kV/m. A detailed analysis of the spatial-temporal behavior of these relaxations is presented.
Workplace	Institute of Plasma Physics
Contact	Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975
Year of Publishing	2007

Number of the records: 1