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POLOIDAL PROFILES OF THE PLASMA PARAMETERS IN L AND H MODES IN THE COMPASS TOKAMAKS DIVERTOR REGION (VEIT2017)
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SYSNO ASEP 0479842 Document Type O - Others R&D Document Type Others Title POLOIDAL PROFILES OF THE PLASMA PARAMETERS IN L AND H MODES IN THE COMPASS TOKAMAKS DIVERTOR REGION (VEIT2017) Author(s) Dimitrova, Miglena (UFP-V) ORCID
Dejarnac, Renaud (UFP-V) RID, ORCID
Hasan, E. (BG)
Popov, Tsv.K. (BG)
Marinov, S. (BG)
Adámek, Jiří (UFP-V) RID, ORCID
Horáček, Jan (UFP-V) RID, ORCID
Weinzettl, Vladimír (UFP-V) RID, ORCID
Havlíček, Josef (UFP-V) RID, ORCID
Imríšek, Martin (UFP-V) RID
Tomeš, Matěj (UFP-V)
Pánek, Radomír (UFP-V) RIDYear of issue 2017 Language eng - English Country BG - Bulgaria Keywords L and H mode ; plasma potential ; electron temperatura and density ; first-derivative probe technique ; parallel power flux density Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects LM2015045 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA16-24724S GA ČR - Czech Science Foundation (CSF) Institutional support UFP-V - RVO:61389021 Annotation Předneseno na: 20th International Summer School Vacuum, Electron and Ion Technologies (VEIT2017), Sozopol, 25-29.09.2017.
The poloidal profiles of the plasma parameters, i.e., the floating and plasma potentials, ion saturation current density, electron temperatures and densities and the parallel power flux density, were obtained by the 39 Langmuir divertor probes of the COMPASS tokamak in L- and H-modes. The probes were swept to measure the current-voltage probe characteristics. The first-derivative probe technique was used to process the data. The experiment was conducted during the same discharge while the plasma column was moving down to the divertor, so that the threshold for transition from L- to ohmic H-mode was reached. The poloidal profiles of the plasma parameters were different in the two regimes. The parallel power flux density and the electron temperature were studied more precisely in the case of NBI-assisted H-mode, a dependence on the plasma current was found.Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2018
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