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Modelling of plasma response to resonant magnetic perturbations and its influence on divertor strike points(IAEA24th.)

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F13%3A00397689" target="_blank" >RIV/61389021:_____/13:00397689 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Modelling of plasma response to resonant magnetic perturbations and its influence on divertor strike points(IAEA24th.)

  • Original language description

    Resonant magnetic perturbations for ELM mitigation in tokamaks can be modified by the plasma response and indeed strong screening of the applied perturbation is in some cases predicted by simulations. In this contribution we use the spiralling patterns (footprints) appearing on the divertor to reveal information about the plasma response. We use two theoretical tools for investigation of the impact of plasma response on footprints: a simple model of the assumed screening currents, and the MHD code MARS-F. MARS-F predicts a more significant reduction of footprints in odd parity than in even parity, explaining the results obtained on MAST. In the MAST experiments the footprints are correlated with the density pump-out, but appear later. Their sudden appearance is incompatible with the vacuum perturbation field approximation and can be explained by a decay of the plasma screening (the event of perturbation penetration).

  • Czech name

  • Czech description

Classification

  • Type

    O - Miscellaneous

  • CEP classification

    BL - Plasma physics and discharge through gases

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/GAP205%2F11%2F2341" target="_blank" >GAP205/11/2341: Control of edge localized modes in tokamaks by external magnetic perturbations</a><br>

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2013

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů