Plasma and Fusion Research
Volume 5, 016 (2010)
Regular Articles
- 1)
- National Institute for Fusion Science, Toki 509-5292, Japan
- 2)
- The Graduate University for Advanced Studies (SOKENDAI), Toki 509-5292, Japan
Abstract
A new gyrokinetic Vlasov simulation code, GKV-X, is developed for investigating the turbulent transport in magnetic confinement devices with non-axisymmetric configurations. Effects of the magnetic surface shapes in three-dimensional equilibrium obtained from the VMEC code are accurately incorporated. Linear simulations of ion temperature gradient (ITG) instabilities and zonal flows in the Large Helical Device (LHD) [O. Motojima, N. Oyabu, A. Komori et al., Nucl. Fusion 43, 1674 (2003)] configuration are carried out by the GKV-X code as benchmark tests against the GKV code [T.-H. Watanabe and H. Sugama, Nucl. Fusion 46, 24 (2006)]. For high poloidal wavenumbers, the frequency, growth rate, and mode structure of the ITG instability are influenced by the VMEC geometrical data such as the metric tensor components of the Boozer coordinates, while the difference between the zonal flow responses obtained by the GKV and GKV-X codes is found to be small in the core LHD region.
Keywords
gyrokinetic simulation, ITG mode, zonal flow, LHD, VMEC equilibrium
Full Text
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This paper may be cited as follows:
Masanori NUNAMI, Tomo-Hiko WATANABE and Hideo SUGAMA, Plasma Fusion Res. 5, 016 (2010).