B. F. McMillan

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A global plasma turbulence simulation code, ORB5, is presented. It solves the gyrokinetic electrostatic equations including zonal flows in axisymmetric magnetic geometry. The present version of the code assumes a Boltzmann electron response on magnetic surfaces. It uses a Particle-In-Cell (PIC), δf scheme, 3D cubic B-splines finite elements for the field(More)
microturbulence simulations T. Vernay, S. Brunner, L. Villard, B. F. McMillan, S. Jolliet, T. M. Tran, A. Bottino, and J. P. Graves Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Association EURATOM–Confédération Suisse, CH-1015 Lausanne, Switzerland Japan Atomic Energy Agency, Higashi-Ueno 6-9-3, Taitou, Tokyo(More)
In this work, a Fourier solver [McMillan et. al., Comput. Phys. Commun. 181, 715 (2010)] is implemented in the global Eulerian gyrokinetic code GT5D [Y. Idomura et. al., Nucl. Fusion 49, 065029, 2009] and in the global Particle-In-Cell code ORB5 [S. Jolliet et. al., Comput. Phys. Commun 177, 477 (2007)] in order to reduce the memory of the matrix associated(More)
Highly variable flux surface averaged heat fluxes are resolved in gyrokinetic simulations of ion temperature gradient ITG turbulence, even in large systems. Radially propagating fronts or avalanches are also seen. Their propagation lengths in gyroradii and relative amplitude remain constant as simulation size is increased, so the avalanches appear to result(More)
turbulence Tobias Görler, Xavier Lapillonne, Stephan Brunner, Tilman Dannert, Frank Jenko, Sohrab Khosh Aghdam, Patrick Marcus, Ben F. McMillan, Florian Merz, Olivier Sauter, Daniel Told, and Laurent Villard Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching D-85748 Germany École Polytechnique Fédérale de Lausanne, Centre de Recherches(More)
The particle-in-cell code ORB5 is a global gyrokinetic turbulence simulation code in tokamak geometry. It has been developed at CRPP, Lausanne, Switzerland, with major contributions from IPP, Garching, Germany, and IPP, Greifswald, Germany, under a long-standing collaboration. The code ORB5 solves the gyrokinetic equations in the whole plasma core,(More)
in tokamak geometry A. Bottino, B.D. Scott, R. Hatzky, S. Jolliet, B.F McMillan, A.G. Peeters, T.M. Tran, T. Vernay and L. Villard 1 Max Planck Institut für Plasmaphysik, IPP-EURATOM Association, Garching, Germany Computer Center of the Max-Planck-Gesellschaft, D-85748 Garching, Germany 3 CRPP, Association Euratom Confédération Suisse, EPFL, Lausanne,(More)
For any kind of geometry on smooth manifolds (Riemannian, Complex, foliation, ...) it is of fundamental importance to be able to determine when two objects are isomorphic. The method of equivalence using G-structures is a systematic way to classify the local invariants of a particular geometry. For example, these ideas can be used to show that the only(More)
Drift wave turbulence is known to self-organize to form axisymmetric macroscopic flows. The basic mechanism for macroscopic flow generation is called inverse energy cascade. Essentially, it is an energy transfer from the short wavelengths to the long wavelengths in the turbulent spectrum due to nonlinear interactions. A class of macroscopic flows, the(More)