Topic/Type: 2.4 Gyro-kinetic and gyro-fluid methods, Poster

Global particle-in-cell simulations of Alfv?nic modes - the cancellation problem resolved

A. Mishchenko1, R. Hatzky2, A. K?nies1

1 Max-Planck-Institut f?r Plasmaphysik, EURATOM-Association, D-17491 Greifswald, Germany
2 Rechenzentrum der Max-Planck-Gesellschaft und des MPI f?r Plasmaphysik, EURATOM-Association, D-85748 Garching, Germany

Global linear gyrokinetic particle-in-cell (PIC) simulations of electromagnetic modes in pinch and tokamak geometries will be reported. The Global Alfv?n Eigenmode, the Mirror Alfv?n Eigenmode, the Toroidal Alfv?n Eigenmode and the Kinetic Ballooning Modes have been simulated [1]. All plasma species have been treated kinetically (i.e. no hybrid fluid-kinetic or reduced-kinetic model has been applied).
The main intention of the simulations is to demonstrate that global Alfv?n modes (and their fast-particle destabilization) can be treated in tokamak geometry using the gyrokinetic PIC method. Hence, the cancellation problem which has been an obstacle over a decade has been finally resolved [2].

[1] A. Mishchenko, R. Hatzky, and A. K?nies: Global particle-in-cell simulations of Alfv?nic modes. Phys. Plasmas 15, 112106 (2008)

[2] R. Hatzky, A. K?nies, and A. Mishchenko: Electromagnetic gyrokinetic PIC simulation with an adjustable control variates method. J. Comp. Phys. 225: 568-590, (2007)