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Measurement of plasma flows into tile gaps
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SYSNO ASEP 0334872 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Measurement of plasma flows into tile gaps Title Měření toku plazmatu do divertorových štěrbin Author(s) Dejarnac, Renaud (UFP-V) RID, ORCID
Komm, Michael (UFP-V) RID, ORCID
Stöckel, Jan (UFP-V) RID
Pánek, Radomír (UFP-V) RIDSource Title Journal of Nuclear Materials. - : Elsevier - ISSN 0022-3115
Roč. 382, č. 1 (2008), s. 31-34Number of pages 4 s. Language eng - English Country NL - Netherlands Keywords Tokamak diagnostic ; Gaps ; Ion saturation current ; Edge modeling ; Sheaths Subject RIV BL - Plasma and Gas Discharge Physics R&D Projects KJB100430602 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z20430508 - UFP-V (2005-2011) UT WOS 000261478000003 DOI 10.1016/j.jnucmat.2008.09.008 Annotation Particle fluxes falling into narrow gaps are of high interest since international thermonuclear experimental reactor plasma facing components will be castellated. In order to investigate the plasma deposition in gaps between tiles, we have developed a special probe that recreates a gap and that can measure the ion saturation current profiles along its both sides. Measurements were performed in the tokamak Czech Academy of Sciences TORus and are compared with a self-consistent kinetic model. The simulations reproduce well the observed asymmetry of the plasma deposition in both poloidal and toroidal gaps and the intensity of the collected currents is well-estimated. However, the agreement is less perfect for poloidal gaps due to the presence of a positive peak on the negative potential inside the gap. Therefore, the plasma deposition does not decay exponentially like in toroidal gaps. Nevertheless, this unique set of experiments confirms globally the results of our model. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2010
Number of the records: 1