3:45 PM - 4:00 PM
[PEM17-08] Application of gyrokinetic simulation code GKV to a dipole configuration
Keywords:simulation, magnetosphere, gyrokinetics
Gyrokinetic simulations have widely been applied to study of turbulent transport in magnetic fusion plasmas, revealing a variety of transport phenomena related to drift wave turbulence and zonal flows. The gyrokinetic code GKV [1] is now utilized to explore the Alfvenic magnetosphere-ionosphere coupling and the auroral dynamics including the electron acceleration process for a slab configuration with straight field lines [2].
While the GKV code is applicable to various magnetic field geometries, such as toroidal (tokamak and helical systems) and ring dipole configurations, application to the dipole field has not been fully tested. Extension of the GKV code to the dipole geometry, self-consistently including kinetic effects and wave-particle interactions, should have an impact on studies of ULF waves, auroral dynamics, physics of radiation belt, and so on.
In this study, we have introduced the dipole configuration in the local flux tube limit and have carried out benchmark tests on a drift wave instability. Numerical difficulties in application to the dipole geometry and possible extensions of the code will also be discussed.
[1] T.-H. Watanabe and H. Sugama, Nuclear Fusion 46, 24 (2006).
[2] K. Fujita and T.-H. Watanabe in this meeting.
While the GKV code is applicable to various magnetic field geometries, such as toroidal (tokamak and helical systems) and ring dipole configurations, application to the dipole field has not been fully tested. Extension of the GKV code to the dipole geometry, self-consistently including kinetic effects and wave-particle interactions, should have an impact on studies of ULF waves, auroral dynamics, physics of radiation belt, and so on.
In this study, we have introduced the dipole configuration in the local flux tube limit and have carried out benchmark tests on a drift wave instability. Numerical difficulties in application to the dipole geometry and possible extensions of the code will also be discussed.
[1] T.-H. Watanabe and H. Sugama, Nuclear Fusion 46, 24 (2006).
[2] K. Fujita and T.-H. Watanabe in this meeting.