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PLASMA PARAMETERS IN DIVERTOR REGION OF THE COMPASS TOKAMAK DURING ISOTOPE EFFECT EXPERIMENT (IWSSPP 2016)
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SYSNO ASEP 0461434 Druh ASEP O - Ostatní výsledky Zařazení RIV O - Ostatní Název PLASMA PARAMETERS IN DIVERTOR REGION OF THE COMPASS TOKAMAK DURING ISOTOPE EFFECT EXPERIMENT (IWSSPP 2016) Tvůrce(i) Dimitrova, Miglena (UFP-V) ORCID
Seidl, Jakub (UFP-V) RID
Hron, Martin (UFP-V) RID, ORCID
Krbec, Jaroslav (UFP-V)
Weinzettl, Vladimír (UFP-V) RID, ORCID
Ivanova, P. (BG)
Popov, Tsv.K. (BG)
Dejarnac, Renaud (UFP-V) RID, ORCID
Vondráček, Petr (UFP-V) RID, ORCID
Junek, Pavel (UFP-V) RID
Pánek, Radomír (UFP-V) RIDRok vydání 2016 Jazyk dok. eng - angličtina Země vyd. BG - Bulharsko Klíč. slova isotope effect ; 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 GA16-25074S 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,
Even though there is a large experimental evidence that isotopic composition has an impact on confinement properties of the tokamak plasma, the main mechanism governing the isotope effect is still unclear. In order to study the effect of isotopes in L-mode, Langmuir probe measurements of the plasma parameters were performed in the divertor region of the COMPASS tokamak. The probe data has been processed using two different methods the first-derivative probe technique (FDPT) for evaluating the real electron energy distribution function (EEDF) and the classical method that assumes Maxwellian EEDF. The measurements were done in hydrogen and deuterium, their mixtures as well as in hydrogen-helium mixture. The influence of glow discharge cleaning of the tokamak chamber with He, H2 or D2 on plasma parameters was also studied. It was found that the EEDF in the divertor region is bi-Maxwellian with a low-energy electron population with temperatures 4-6 eV and high energy electron group 10-25 eV. However, during some shots the EEDF is bi-Maxwellian only at the beginning and changes to Maxwellian with the time.
Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2017
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