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First results from the neutral particle analyzer on the COMPASS tokamak

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    0474056 - ÚFP 2018 RIV IT eng C - Konferenční příspěvek (zahraniční konf.)
    Bogár, Klára - Melnik, A. - Tomeš, Matěj - Stöckel, Jan - Janky, Filip - Komm, Michael - Imríšek, Martin - Háček, Pavel - Varju, Jozef - Weinzettl, Vladimír
    First results from the neutral particle analyzer on the COMPASS tokamak.
    Proceedings of Science: 1st EPS Conference on Plasma Diagnostics, ECPD 2015. Frascati: Proceedings of Science (PoS), 2015, č. článku (ECPD2015)074. PoS. ISSN 1824-8039.
    [EPS Conference on Plasma Diagnostics, ECPD 2015/1./. Frascati (IT), 14.04.2015-17.04.2015]
    Grant CEP: GA MŠk(CZ) LM2011021; GA ČR(CZ) GA15-10723S
    GRANT EU: European Commission(XE) 633053 - EUROfusion
    Institucionální podpora: RVO:61389021
    Klíčová slova: COMPASS tokamak * Edge localized modes * Neutral Particle Analyzer (NPA)
    Obor OECD: Fluids and plasma physics (including surface physics)

    The Neutral Particle Analyzer (NPA) for the COMPASS tokamak was recently upgraded and absolutely
    calibrated in the Ioffe Institute, St. Petersburg. NPA allows simultaneous measurements of the
    energy spectra of fast hydrogen and deuterium atoms and determination of the ion temperature. Energy
    spectra of the neutral fluxes are measured by NPA in Ohmic as well as in the NBI heated plasmas. The
    measured ion temperature in L-mode plasmas varies in the range of 300-500 eV. After the L-H transition,
    the ion temperature increases by ΔTi ≈ 250 eV. A relatively high temporal resolution of the NPA data
    acquisition system allows study of fast transient phenomena, such as the Edge Localized Mode and sawtooth
    oscillation.
    Comparative measurement of Ti in the plasma core given by NPA and at the plasma edge using
    Retarding Field Analyzer is also reported.
    Trvalý link: http://hdl.handle.net/11104/0271196

     
     
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