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Plasma potential evaluated by Ball pen and Langmuir probes in the COMPASS tokamak
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SYSNO ASEP 0430541 Document Type O - Others R&D Document Type Others Title Plasma potential evaluated by Ball pen and Langmuir probes in the COMPASS tokamak Author(s) Dimitrova, Miglena (UFP-V) ORCID
Popov, Tsv.K. (BG)
Kasilov, A. (UA)
Adámek, Jiří (UFP-V) RID, ORCID
Ivanova, P. (BG)
Hasan, E. (BG)
Vondráček, Petr (UFP-V) RID, ORCID
Horáček, Jan (UFP-V) RID, ORCID
Dejarnac, Renaud (UFP-V) RID, ORCID
Stöckel, Jan (UFP-V) RID
Imríšek, Martin (UFP-V) RID
Pánek, Radomír (UFP-V) RIDYear of issue 2014 Language eng - English Country BG - Bulgaria Keywords Langmuir and Ball-pen probes ; plasma potential ; electron energy distribution functions ; electron temperatura and density ; first-derivative probe technique ; COMPASS tokamak Subject RIV BL - Plasma and Gas Discharge Physics R&D Projects LM2011021 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GAP205/12/2327 GA ČR - Czech Science Foundation (CSF) Institutional support UFP-V - RVO:61389021 Annotation Předneseno na:6th International Workshop and Summer School on Plasma Physics (IWSSPP2014),Kiten,BG,30.06.-06.07.2014, The radial distribution of the main plasma parameters in the scrape-off-layer (SOL) of the COMPASS tokamak is measured during L and H-mode regimes by using both Langmuir and Ball-pen probes mounted on a horizontal reciprocating manipulator. Radial profiles of the plasma potential and the electron energy distribution functions (EEDF), i.e. electron temperatures and densities, are derived from measured Langmuir probe current-voltage characteristics by applying the first derivative probe technique (FDPT) and compared with the results from classical probe technique. Ball-pen probe measurements provides direct evaluation of the plasma potential with high temporal resolution. The derived results for plasma potential from Langmuir probe and Ball-pen probe are in a quantitative agreement. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2015
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