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Progress with the COGENT Edge Kinetic Code: Implementing the Fokker-Planck Collision Operator
- Source :
- Contributions to Plasma Physics. 54:517-523
- Publication Year :
- 2014
- Publisher :
- Wiley, 2014.
-
Abstract
- Here, COGENT is a continuum gyrokinetic code for edge plasma simulations being developed by the Edge Simulation Laboratory collaboration. The code is distinguished by application of a fourth-order finite-volume (conservative) discretization, and mapped multiblock grid technology to handle the geometric complexity of the tokamak edge. The distribution function F is discretized in v∥ – μ (parallel velocity – magnetic moment) velocity coordinates, and the code presently solves an axisymmetric full-f gyro-kinetic equation coupled to the long-wavelength limit of the gyro-Poisson equation. COGENT capabilities are extended by implementing the fully nonlinear Fokker-Plank operator to model Coulomb collisions in magnetized edge plasmas. The corresponding Rosenbluth potentials are computed by making use of a finite-difference scheme and multipole-expansion boundary conditions. Details of the numerical algorithms and results of the initial verification studies are discussed. (© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Details
- ISSN :
- 08631042
- Volume :
- 54
- Database :
- OpenAIRE
- Journal :
- Contributions to Plasma Physics
- Accession number :
- edsair.doi...........b6935a43eeb9844a369aa350ab358bb5