Název: Impurity Dynamics in Turbulent Plasma in Tokamak Scrape-off Layer
Autoři: Seidl, J. ; Krlín, Ladislav
Typ dokumentu: Příspěvky z konference
Konference/Akce: Annual Conference of Doctoral Students - WDS 2010 /19th./, Prague (CZ), 2010-06-01 / 2010-06-04
Rok: 2010
Jazyk: eng
Abstrakt: 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.
Klíčová slova: impurity transport; plasma impurities; plasma turbulence
Číslo projektu: CEZ:AV0Z20430508 (CEP)
Zdrojový dokument: Proceedings of the 19th Annual Conference of Doctoral Students - WDS 2010 , ISBN 978-80-7378-141-5

Instituce: Ústav fyziky plazmatu AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0192242

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-42264


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav fyziky plazmatu
Konferenční materiály > Příspěvky z konference