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Particle-in-cell simulations of plasma interaction with shaped and unshaped gaps in TEXTOR
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SYSNO ASEP 0367367 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Particle-in-cell simulations of plasma interaction with shaped and unshaped gaps in TEXTOR Author(s) Komm, Michael (UFP-V) RID, ORCID
Dejarnac, Renaud (UFP-V) RID, ORCID
Gunn, J. P. (FR)
Kirschner, A. (DE)
Litnovsky, A. (DE)
Matveev, D. (BE)
Pekarek, Z. (CZ)Source Title Plasma Physics and Controlled Fusion. - : Institute of Physics Publishing - ISSN 0741-3335
Roč. 53, č. 11 (2011), s. 115004-115004Number of pages 11 s. Publication form web - web Language eng - English Country GB - United Kingdom Keywords Tokamak ; gap ; plasma PIC ; retention power flux Subject RIV BL - Plasma and Gas Discharge Physics R&D Projects GA202/09/1467 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20430508 - UFP-V (2005-2011) UT WOS 000296603200005 DOI 10.1088/0741-3335/53/11/115004 Annotation This paper presents particle-in-cell simulations of the plasma behaviour in the vicinity of gaps in castellated plasma-facing components (PFCs). The point of interest was the test limiter of the TEXTOR tokamak, a PFC designed for studies of plasma–wall interactions, in particular, related to impurity transport and fuel retention. Simulations were performed for various plasma conditions in the vicinity of the castellated surface, where the gaps can be either shaped or unshaped. It was observed that depending on plasma parameters the transport of plasma particles inside the gap can be either in potential- or geometry-dominated regimes. The mechanisms responsible for the formation of a potential peak inside the poloidal gap and its consequences on plasma deposition profiles are discussed. A study of gap shaping was performed in order to validate its effectiveness. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2012
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