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Edge Plasma Physics and Relevant Diagnostics on the CASTOR tokamak
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SYSNO ASEP 0029777 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Edge Plasma Physics and Relevant Diagnostics on the CASTOR tokamak Title Fyzika okrajového plazmatu a odpovídající diagnostika na tokamaku CASTOR Author(s) Stöckel, Jan (UFP-V) RID
Devynck, P. (FR)
Gunn, J. (FR)
Martines, E. (IT)
Bonhomme, G. (FR)
Van Oost, G. (BE)
Hron, Martin (UFP-V) RID, ORCID
Ďuran, Ivan (UFP-V) RID, ORCID
Pánek, Radomír (UFP-V) RID
Stejskal, Pavel (UFP-V)
Adámek, Jiří (UFP-V) RID, ORCIDSource Title Schriften des Forschungszentrums Jülich - ISSN 1433-5581
Roč. 3, - (2004), s. 1-6Number of pages 6 s. Action First Cairo Conference on Plasma Physics & Applications Event date 11.10.2003-15.10.2003 VEvent location Cairo Country EG - Egypt Event type WRD Language eng - English Country DE - Germany Keywords tokamak ; edge plasma ; probe diagnostics ; biasing ; turbulence ; polarization Subject RIV BL - Plasma and Gas Discharge Physics R&D Projects GA202/03/0786 GA ČR - Czech Science Foundation (CSF) GP202/03/P062 GA ČR - Czech Science Foundation (CSF) Annotation We describe results of two sets of measurements performed with a full poloidal array of Langmuir probes located in the scrape-off layer (SOL) of the CASTOR tokamak. At first, a biased electrode is inserted into the SOL. The resulting poloidally localized electric field structures are identified by means of the ring of probes and a consequent modification of the convective transport is demonstrated. In the second experiment, the turbulent fluctuations are measured in standard ohmic discharges. The analysis of the probe signals reveals a spatially periodic mode with the poloidal mode number equal to the edge safety factor q, which propagates poloidally in the direction of the ErxB drift. This observation is interpreted as a signature of a single turbulent structure, which snakes around the torus several times following the local helicity of the magnetic field. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2006
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