Drift-kinetics instabilities in a sheared plasma slab using particle approach
Event details
| Date | 08.07.2015 |
| Hour | 10:30 |
| Speaker | Noé Ohana, Etudiant EPFL |
| Location |
PPB 019
|
| Category | Conferences - Seminars |
Particle-In-Cell (PIC) codes have shown their efficiency to simulate plasma instabilities in tokamaks. The aim of this work is to develop a new PIC code starting from an optimized numerical PIC engine, in order to test new approaches such as Particle-in-Fourier or GPU computing. A field solver using finite elements method has been developed. Physical equations governing non-collisional plasma instabilities are implemented within the drift-kinetic approximation. To attest the validity of simulations, instabilities frequencies and growth rates are compared with local dispersion relations for ion acoustic waves and ion temperature gradient instabilities. Moreover, performance tests are done to study the scaling of the computation time with the problem size, and the scalability on large clusters. The benefits of adding a field-aligned Fourier filter in the solver are presented. It is also shown that the best compromise between precision and computation time is reached with quadratic splines.
Practical information
- Informed public
- Free
Organizer
- Prof. P. Ricci
Contact
- Prof. P. Ricci