A.G. Peeters F. Rath R. Buchholz Y. Camenen J. Candy F.J. Casson S.R. Grosshauser W.A. Hornsby D. Strintzi A. Weikl
It is shown that ITG turbulence close to the threshold exhibits a long time behaviour, with smaller heat fluxes at later times. This reduction is connected with the slow growth of long wave length zonal flows and, consequently, the numerical dissipation on these flows must be sufficient small. Close to the nonlinear threshold for turbulence generat…
Preprint PublishedW. A. Hornsby P. Migliano R. Buchholz S. Grosshauser A. Weikl D. Zarzoso F. J. Casson E. Poli A. G. Peeters
The non-linear evolution of a magnetic island is studied using the Vlasov gyro-kinetic code GKW. The interaction of electromagnetic turbulence with a self-consistently growing magnetic island, generated by a tearing unstable >0 current profile, is considered. The turbulence is able to seed the magnetic island and bypass the linear growth phase b…
Preprint PublishedG. Szepesi M. Romanelli F. Militello A.G. Peeters Y. Camenen F.J. Casson W.A. Hornsby A.P. Snodin D. Wagner The Ftu Team
The impact of lithium impurities on the microstability and turbulent transport characteristics in the core of a typical FTU Liquid Lithium Limiter (LLL) (Mazzitelli et al., Nucl. Fusion, 2011) discharge during the density ramp-up phase is studied. A non-linear gyrokinetic analysis performed with GKW (Peeters et al., Comp. Phys. Comm., 2009) accompa…
PublishedW A Hornsby A R Bell R J Kingham R O Dendy
We present a novel code which solves the Vlasov-Fokker-Planck (VFP) equation in three dimensional magnetic turbulence using finite difference methods. The approach is distinct from particle tracking codes. The angular component of velocity space distribution function is represented by a spherical harmonic expansion drawing on an approach pioneered …
Published