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EFFECT OF THE RESONANT MAGNETIC PERTURBATION ON THE PLASMA PARAMETERS IN DIVERTOR REGION OF THE COMPASS TOKAMAK (IWSSPP 2016)
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SYSNO ASEP 0461460 Druh ASEP O - Ostatní výsledky Zařazení RIV O - Ostatní Název EFFECT OF THE RESONANT MAGNETIC PERTURBATION ON THE PLASMA PARAMETERS IN DIVERTOR REGION OF THE COMPASS TOKAMAK (IWSSPP 2016) Tvůrce(i) Dimitrova, Miglena (UFP-V) ORCID
Cahyna, Pavel (UFP-V) RID
Popov, Tsv.K. (BG)
Hasan, E. (BG)
Ivanova, P. (BG)
Markovič, Tomáš (UFP-V) RID
Peterka, Matěj (UFP-V) RID, ORCID
Stöckel, Jan (UFP-V) RID
Dejarnac, Renaud (UFP-V) RID, ORCID
Imríšek, Martin (UFP-V) RID
Háček, Pavel (UFP-V) RID, ORCID
Havlíček, Josef (UFP-V) RID, ORCID
Pánek, Radomír (UFP-V) RIDRok vydání 2016 Jazyk dok. eng - angličtina Země vyd. BG - Bulharsko Klíč. slova Resonant Magnetic Perturbations ; plasma potential ; electron energy distribution function ; electron temperatura and density ; first-derivative probe technique Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech CEP LM2015045 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GA16-24724S GA ČR - Grantová agentura ČR Institucionální podpora UFP-V - RVO:61389021 Anotace Předneseno na: 7th International Workshop and Summer School on Plasma Physics (IWSSPP 2016), Kiten,26.06.-02.07.2016,
This work discusses the application of Resonant Magnetic Perturbations (RMPs) in the COMPASS tokamak in Ohmic D-shaped discharges, with toroidal magnetic field BT = 1.15 T, plasma current Ip = 170 kA and line-average electron density ne = 5×1019 m−3. In order to study the effect of RMPs on the plasma parameters in the divertor region with high spatial resolution, the strike-points were swept radially across 39 Langmuir divertor probes during a shot. The current-voltage characteristics data were processed using the novel first-derivative probe technique which allows one to evaluate the plasma potential and the real electron energy distribution function (EEDF), respectively the electron temperatures and densities. It has been found that in the vicinity of the inner and outer strike points of the divertor, that EEDF is bi-Maxwellian, with a low-energy electron population (4 - 6 eV) and a higher energy one (10 - 30 eV).
When applying RMPs with alternate directions of the current in the external coils, we observed splitting of strike points characterized by change of spatial profiles of the floating potential and the ion saturation current at the outer strike point
Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2017
Počet záznamů: 1