POLOIDAL PROFILES OF THE PLASMA PARAMETERS IN L AND H MODES IN THE COMPASS TOKAMAKS DIVERTOR REGION (VEIT2017)

0479842 - ÚFP 2018 RIV BG eng O - Ostatní výsledky
Dimitrova, Miglena - Dejarnac, Renaud - Hasan, E. - Popov, Tsv.K. - Marinov, S. - Adámek, Jiří - Horáček, Jan - Weinzettl, Vladimír - Havlíček, Josef - Imríšek, Martin - Tomeš, Matěj - Pánek, Radomír
POLOIDAL PROFILES OF THE PLASMA PARAMETERS IN L AND H MODES IN THE COMPASS TOKAMAKS DIVERTOR REGION (VEIT2017).
2017
Grant CEP: GA MŠMT(CZ) LM2015045; GA ČR(CZ) GA16-24724S
Institucionální podpora: RVO:61389021
Klíčová slova: L and H mode * plasma potential * electron temperatura and density * first-derivative probe technique * parallel power flux density
Obor OECD: Fluids and plasma physics (including surface physics)

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.
Trvalý link: http://hdl.handle.net/11104/0275768