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Impurity Dynamics in Turbulent Plasma in Tokamak Scrape-off Layer
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SYSNO ASEP 0352829 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Impurity Dynamics in Turbulent Plasma in Tokamak Scrape-off Layer Tvůrce(i) Seidl, J. (CZ)
Krlín, Ladislav (UFP-V) RIDZdroj.dok. Proceedings of the 19th Annual Conference of Doctoral Students - WDS 2010 , 3 - Physics. - Prague : MATFYZPRESS, 2010 / Šafránková J. ; Pavlů J. - ISBN 978-80-7378-141-5 Rozsah stran s. 199-204 Poč.str. 6 s. Akce Annual Conference of Doctoral Students - WDS 2010 /19th./ Datum konání 01.06.2010-04.06.2010 Místo konání Prague Země CZ - Česká republika Typ akce WRD Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova plasma turbulence ; plasma impurities ; impurity transport Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech CEZ AV0Z20430508 - UFP-V (2005-2011) Anotace We simulate behavior of plasma impurities in turbulent potential in tokamak scrape-off layer. Assuming low density of impurities we use test particle approach to investigate movement of individual particles in time evolving potential of isolated structure generated by interchange instability. Behavior of the plasma is modeled using reduced fluid model. We compare behavior of test particles under guiding center drift approximation with full-orbit 2D Hamiltonian equations of motion. While we find flow of particles governed purely by ExB drift to be incompressible, including also polarization drift results in compressibility of the flow. Particles traced along their full orbits exhibit the compressibility as well, however, larger in space and different in its amplitude. We therefore conclude that neglecting finite Larmor radius and assuming dynamics based on drift approximation may introduce significant error into simulations of impurity behavior in tokamak SOL. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2011
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