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Model for screening of resonant magnetic perturbations by plasma in a realistic tokamak geometry and its impact on divertor strike points
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SYSNO ASEP 0366763 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Model for screening of resonant magnetic perturbations by plasma in a realistic tokamak geometry and its impact on divertor strike points Author(s) Cahyna, Pavel (UFP-V) RID
Nardon, E. (FR)Source Title Journal of Nuclear Materials. - : Elsevier - ISSN 0022-3115
Roč. 415, č. 1 (2011), S927-S931Number of pages 5 s. Publication form web - web Action International Conference on Plasma-Surface Interactions in Controlled Fusion Device/19th./ Event date 24.05.2010-28.05.2010 VEvent location San Diego Country US - United States Event type WRD Language eng - English Country NL - Netherlands Keywords tokamaks ; ELM control ; resonant magnetic perturbations ; divertor Subject RIV BL - Plasma and Gas Discharge Physics R&D Projects 7G09042 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LA08048 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z20430508 - UFP-V (2005-2011) UT WOS 000298128100211 DOI 10.1016/j.jnucmat.2011.01.117 Annotation This work addresses the question of the relation between strike-point splitting and magnetic stochasticity at the edge of a poloidally diverted tokamak in the presence of externally imposed magnetic perturbations. More specifically, ad-hoc helical current sheets are introduced in order to mimic a hypothetical screening of the external resonant magnetic perturbations by the plasma. These current sheets, which suppress magnetic islands, are found to reduce the amount of splitting expected at the target, which suggests that screening effects should be observable experimentally. Multiple screening current sheets reinforce each other, i.e. less current relative to the case of only one current sheet is required to screen the perturbation. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2012
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