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Simulating plasma turbulence with the global Eulerian gyrokinetic code GT5D

Jolliet, S.; Idomura, Yasuhiro   

In this talk, the numerical implementation of the global Eulerian gyrokinetic code GT5D will be presented. GT5D solves the vlasov-maxwell system (including coulomb collisions and a heat source and sink operator) in 5D, which requires huge CPU ressources. In particular, the implementation of a straight-field-line solver, reducing the memory of the field equation matrix by orders of magnitude, will be detailed. This scheme takes advantage of the alignment of the turbulence with the magnetic field lines to suppress small parallel wavelengths with a fourier filter. In addition, weak and strong scalings, as well as a plasma size scaling will be presented.

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