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SUMMARY:Drift-kinetics instabilities in a sheared plasma slab using partic
 le approach
DTSTART:20150708T103000
DTSTAMP:20260408T050637Z
UID:ecc4fbd02dbb700ae64ca72763e5f266a5511409d64b667bc237ea21
CATEGORIES:Conferences - Seminars
DESCRIPTION:Noé Ohana\, Etudiant EPFL\nParticle-In-Cell (PIC) codes have 
 shown their efficiency to simulate plasma instabilities in tokamaks. The a
 im of this work is to develop a new PIC code starting from an optimized nu
 merical PIC engine\, in order to test new approaches such as Particle-in-F
 ourier or GPU computing. A field solver using finite elements method has b
 een developed. Physical equations governing non-collisional plasma instabi
 lities are implemented within the drift-kinetic approximation. To attest t
 he validity of simulations\, instabilities frequencies and growth rates ar
 e 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 t
 he scalability on large clusters. The benefits of adding a field-aligned F
 ourier filter in the solver are presented. It is also shown that the best 
 compromise between precision and computation time is reached with quadrati
 c splines.
LOCATION:PPB 019
STATUS:CONFIRMED
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