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Fluctuations in the scrape-off layer and edge plasma of the COMPASS tokamak
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SYSNO ASEP 0492003 Document Type C - Proceedings Paper (int. conf.) R&D Document Type O - Ostatní Title Fluctuations in the scrape-off layer and edge plasma of the COMPASS tokamak Author(s) Seidl, Jakub (UFP-V) RID
Jiráková, Kateřina (UFP-V)
Adámek, Jiří (UFP-V) RID, ORCID
Grover, Ondřej (UFP-V) ORCID
Horáček, Jan (UFP-V) RID, ORCID
Hron, Martin (UFP-V) RID, ORCID
Vondráček, Petr (UFP-V) RID, ORCIDNumber of authors 7 Source Title Europhysics Conference Abstracts, 42A. - : European Physical Society, 2018 / Coda S. ; Berndt J. ; Lapenta G. ; Mantsinen M. ; Michaut C. ; Weber S. - ISBN 979-10-96389-08-7 Number of pages 4 s. Publication form Online - E Action 45th European Physical Society Conference on Plasma Physics Event date 02.07.2018 - 06.07.2018 VEvent location Praha Country CZ - Czech Republic Event type WRD Language eng - English Country CZ - Czech Republic Keywords plasma ; tokamak ; turbulence Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects GA16-25074S GA ČR - Czech Science Foundation (CSF) 8D15001 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2015045 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFP-V - RVO:61389021 Annotation In this work we study properties of turbulent structures in the scrape-off layer (SOL) and edge plasma of the COMPASS tokamak. Two distinct types of coherent oscillations are observed: a) broadband high frequency branch rotating in the electron diamagnetic direction, appearing mainly in the confined region but protruding also to the SOL b) low-frequency blobs rotating in an opposite poloidal direction, formed in the vicinity of the radius of zero electric field. The transition region is localized in the near SOL, where both types spatially overlap and interact and the radial particle transport gradually transfers from high to low frequencies. Even though skewness of fluctuations of the ion saturation current is positive even inside LCFS, distinguishable Gamma-distributed PDF, formed by the low-frequency fluctuations, arises in the near SOL and most of the fluctuations that form a positive skewness in the edge region disappear around LCFS. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2019 Electronic address http://ocs.ciemat.es/EPS2018PAP/pdf/P1.1103.pdf
Number of the records: 1