[Table of Contents]

Plasma and Fusion Research

Volume 5, 016 (2010)

Regular Articles


Gyrokinetic Vlasov Code Including Full Three-dimensional Geometry of Experiments
Masanori NUNAMI1), Tomo-Hiko WATANABE1,2) and Hideo SUGAMA1,2)
1)
National Institute for Fusion Science, Toki 509-5292, Japan
2)
The Graduate University for Advanced Studies (SOKENDAI), Toki 509-5292, Japan
(Received 23 February 2010 / Accepted 17 March 2010 / Published 7 May 2010)

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

DOI: 10.1585/pfr.5.016


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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).