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首页> 外文期刊>Nuclear fusion >Internal measurements of Alfven eigenmodes with heavy ion beam probing in toroidal plasmas
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Internal measurements of Alfven eigenmodes with heavy ion beam probing in toroidal plasmas

机译：在环形等离子体中用重离子束探测Alfven本征模式的内部测量

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摘要

Energetic ion driven Alfven eigenmodes (AEs) are believed to be an important element disturbing the transport in a future fusion reactor. The studies of the AE properties in modern toroidal devices have made crucial contributions to the reactor relevant physics. AEs are conventionally studied by magnetic probes (MPs), which provide the poloidal m and toroidal n mode numbers and their spectral characteristics. Heavy ion beam probing (HIBP) has become a new tool to study AEs with high spatial and frequency resolution. HIBP in the TJ-II heliac observes locally (~lcm) resolved AEs over the whole radial interval. The set of low-m (m < 8) modes, detected with the high-frequency resolution (<5kHz), present different types of AEs. AEs are pronounced in the local density, electric potential and poloidal magnetic field oscillations, detected simultaneously by HIBP in the frequency range 50 kHz < f_(AE) < 300 kHz. Various AE modes are visible in the neutral beam injector (NBI)-heated plasma for co-NBI (<450 kW), counter- (<450 kW) and balanced NBI (<900 kW) from the plasma centre to the edge. A high coherence between MP and HIBP data was found for specific AEs. When the density rises, AE frequency decreases, f_(AE) ~ n_e~(-1/2), and the cross-phase between the plasma density, poloidal magnetic field and potential remains constant. The amplitude of the AE potential oscillations ωΨ~(AE) ~ 10 V was estimated. Poloidally resolved density and potential measurements may provide information about the AE poloidal wavelength and the AE contribution to the poloidal electric field E_(pol) and the turbulent particle flux T_(E×B)- The typical range of E_(pol) oscillations for AEs is δE_(pol)~(AE) ~ 10 Vcm~(-1). Depending on the δ_(n_e) and δE_(pol) amplitudes and cross-phase, AEs may make a small or a significant contribution to the turbulent particle flux T(E×B) for the observed wavenumbers kθ < 3 cm~(-1).
机译：高能离子驱动的Alfven本征模式（AE）被认为是干扰未来聚变反应堆中运输的重要元素。对现代环形装置的AE特性的研究为反应堆相关的物理学做出了重要贡献。常规上，AE是通过磁探针（MPs）进行研究的，磁探针提供了极向m和环向n模态数及其光谱特性。重离子束探测（HIBP）已成为研究具有高空间和频率分辨率的AE的新工具。 TJ-II直升机中的HIBP在整个径向间隔内观察到局部（〜1cm）分辨的声发射。以高频分辨率（<5kHz）检测到的一组低m（m <8）模式呈现出不同类型的AE。 AE在50 kHz

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  • 来源
    《Nuclear fusion》 |2010年第8期|P.24.1-24.11|共11页
  • 作者

    A.V. Melnikov; L.G. Eliseev; R. Jimenez-Gomez; E. Ascasibar; C. Hidalgo; A.A. Chmyga; A.D. Komarov; A.S. Kozachok; I.A. Krasilnikov; S.M. Khrebtov; L.I. Krupnik; M. Liniers; S.E. Lysenko; V.A. Mavrin; J.L. de Pablos; M.A. Pedrosa; S.V. Perfilov; M.V. Ufimtsev; T. Ido; K. Nagaoka; S. Yamamoto; Yu.I. Taschev; A.I. Zhezhera; A.I. Smolyakov;

  • 作者单位

    Institute of'Tokamak Physics, RRC 'Kurchatov Institute', 123182, Moscow, Russia;

    rnInstitute of'Tokamak Physics, RRC 'Kurchatov Institute', 123182, Moscow, Russia;

    rnAsociacion EURATOM-CIEMAT, 28040, Madrid, Spain;

    rnAsociacion EURATOM-CIEMAT, 28040, Madrid, Spain;

    rnAsociacion EURATOM-CIEMAT, 28040, Madrid, Spain;

    rnInstitute of Plasma Physics, NSC KIPT, 310108, Kharkov, Ukraine;

    rnInstitute of Plasma Physics, NSC KIPT, 310108, Kharkov, Ukraine;

    rnInstitute of Plasma Physics, NSC KIPT, 310108, Kharkov, Ukraine;

    rnInstitute ot'Tokamak Physics, RRC 'Kurchatov Institute', 123182, Moscow, Russia;

    rnInstitute of Plasma Physics, NSC KIPT, 310108, Kharkov, Ukraine;

    rnInstitute of Plasma Physics, NSC KIPT, 310108, Kharkov, Ukraine;

    rnAsociacion EURATOM-CIEMAT, 28040, Madrid, Spain;

    rnInstitute of'Tokamak Physics, RRC 'Kurchatov Institute', 123182, Moscow, Russia;

    rnInstitute of'Tokamak Physics, RRC 'Kurchatov Institute', 123182, Moscow, Russia;

    rnAsociacion EURATOM-CIEMAT, 28040, Madrid, Spain;

    rnAsociacion EURATOM-CIEMAT, 28040, Madrid, Spain;

    rnInstitute of'Tokamak Physics, RRC 'Kurchatov Institute', 123182, Moscow, Russia;

    rnNational Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan;

    rnInstitute of Advanced Energy, Kyoto University, Kyoto, 611 -0011, Japan;

    rnInstitute of Advanced Energy, Kyoto University, Kyoto, 611 -0011, Japan;

    rnUniversity of Saskatchewan, 116 Science Place, Saskatoon SK S7N 5E2, Canada;

    rnInstitute of Plasma Physics, NSC KIPT, 310108, Kharkov, Ukraine;

    rnInstitute of Plasma Physics, NSC KIPT, 310108, Kharkov, Ukraine;

    rnUniversity of Saskatchewan, 116 Science Place, Saskatoon SK S7N 5E2, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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