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Performance Enhancements to ELMFIRE Gyrokinetic Code Leading to New Ranges of Application

Francisco Ogando, Artur Signell, Jukka A. Heikkinen, Mats Aspnäs, Svante Henriksson, Salomon Janhunen, Timo P. Kiviniemi, Performance Enhancements to ELMFIRE Gyrokinetic Code Leading to New Ranges of Application. In: 33rd EPS Conference on Plasma Physics, Rome, June 19-23, 2006, Europhysics Conference Abstracts 301, 2006.

Abstract:

Plasma turbulence has shown to be responsible for the so called anomalous transport that
compromises the magnetic confinement of fusion plasmas. This anomalous transport takes
values hundreds of times higher than predicted by the neoclassical theory. The study of the
dynamics of turbulent plasmas has become a key issue in order to control the generation of
turbulence in a plasma and its influence on the degradation of confinement.
<P>
With that purpose the ELMFIRE code was developed as a joint project between VTT
and TKK. It is a Monte Carlo full-f nonlinear gyrokinetic plasma simulation code in
fivedimensional toroidal geometry. The code includes several physical features like multiple
different species, collisions between them and neutral particle ionization. The movement
equations take into consideration the existing drifts in tokamak plasmas.
<P>
The gyrokinetic model simplifies the description of motion of charged particle motion by
averaging it over the quick gyration around the magnetic fields lines. This produces a reduction
of phase space to five dimensions and thus reducing the computational requirements for
its solving. The full-f formulation of the problem includes solving the whole five dimensional
particle distributions, opposite to the delta-f technique, which for further simplification considers
perturbations from local Maxwellian distributions. However the full-f technique included in
ELMFIRE produces accurate results even in the presence of strong gradients or perturbations in
the plasma

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BibTeX entry:

@INPROCEEDINGS{inpOgSiHeAsHeJaKi06a,
  title = {Performance Enhancements to ELMFIRE Gyrokinetic Code Leading to New Ranges of Application},
  booktitle = {33rd EPS Conference on Plasma Physics, Rome, June 19-23, 2006},
  author = {Ogando, Francisco and Signell, Artur and Heikkinen, Jukka A. and Aspnäs, Mats and Henriksson, Svante and Janhunen, Salomon and Kiviniemi, Timo P.},
  volume = {301},
  series = {Europhysics Conference Abstracts},
  year = {2006},
}

Belongs to TUCS Research Unit(s): High Performance Computing and Communication

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