Speaker
Prof.
T.S. Hahm
(Seoul National Univeristy)
Description
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\title{Residual Zonal Flows in Reactor Tokamaks Plasmas}
\author{\underline{T.S. Hahm}$^{*}$ and Y.W. Cho}
\institute{Department of Nuclear Engineering, Seoul National University, Seoul, 08826, Republic of Korea\\
$^*$ tshahm@snu.ac.kr}
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Zonal flow plays an important role in turbulence regulation via its flow shearing\cite{Hahm1999}.
It is mainly in poloidal direction and therefore gets reduced by collisionless process in toroidal geometry.
But it asymptotes in time to a non-zero value called the residual zonal flow level \cite{RH1998}. In this study, we investigate the residual zonal flow in reactor plasmas using modern gyro-kinetic approach\cite{Hahm1988}.
We find that the residual zonal flow can be enhanced for the intermediate radial wavelength range on the order of the ion banana width in the presence of slowing down fusion products.
\begin{thebibliography}{99}
\bibitem{Hahm1999}
T.S. Hahm, M.A. Beer. Z. Lin, G.W. Hammett, W.W. Lee, and W.M. Tang, Phys. Plasmas \textbf{6}, 922 (1999)
\bibitem{RH1998}
M.N.Rosenbluth and F.L. Hinton Phys. Rev. Lett. \textbf{80}, 724 (1998)
\bibitem{Hahm1988}
T.S. Hahm, Phys. Fluids {\bf 31}, 2670 (1988)
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Primary author
Prof.
T.S. Hahm
(Seoul National Univeristy)
