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Fast measurements of the electron temperature in divertor region of the COMPASS tokamak using ball-pen probe

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    0453933 - ÚFP 2016 RIV PT eng C - Conference Paper (international conference)
    Adámek, Jiří - Seidl, Jakub - Pánek, Radomír - Komm, Michael - Vondráček, Petr - Stöckel, Jan
    Fast measurements of the electron temperature in divertor region of the COMPASS tokamak using ball-pen probe.
    EPS 2015:42nd European Physical Society Conference on Plasma Physics. Vol. 39E. Mulhouse: European Physical Society, 2015, P4.101-P4.101, P4.101. Europhysics Conference Abstracts, ECA, 39E. ISBN 2-914771-98-3.
    [EPS 2015 Conference on Plasma Physics/42./. Lisbon (PT), 22.06.2015-26.06.2015]
    R&D Projects: GA ČR(CZ) GA15-10723S; GA MŠk(CZ) LM2011021
    EU Projects: European Commission(XE) 633053
    Institutional support: RVO:61389021
    Keywords : plasma * tokamak
    Subject RIV: BL - Plasma and Gas Discharge Physics
    http://ocs.ciemat.es/EPS2015PAP/pdf/P4.101.pdf

    The electron temperature in divertor regions of present day devices is typically measured by swept Langmuir probes or triple probe technique. However, the measurement of its evolution during ELM filaments requires high temporal resolution, which has not been achieved by these techniques yet. Alternative option how to determine the electron temperature with high time resolution is to use direct measurements of the plasma and floating potentials. The electron temperature is consequently determined from the difference of both potentials normalized by the proper coefficient for specific gas and magnetic field. The floating potential is routinely measured by Langmuir probe and the plasma potential can be directly measured by ball-pen probe (BPP). Recently, a new array of BPPs and dome-shaped Langmuir probes was installed also in a divertor target of the COMPASS tokamak.
    Permanent Link: http://hdl.handle.net/11104/0254942

     
     
Number of the records: 1