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Title: Progress with the 5D full-F continuum gyrokinetic code COGENT

Journal Article · · Contributions to Plasma Physics
 [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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COGENT is an Eulerian gyrokinetic code being developed for edge plasma modelling. The code is distinguished by the use of a high-order finite-volume (conservative) discretization combined with mapped multi-block grid technology. Our recent work is focused on the development of a 5D full-F COGENT version.Anumerical algorithm utilizing locally a field-aligned multi-block coordinate system is implemented to facilitate simulations of highly anisotropic microturbulence in the presence of a strong magnetic shear. In this approach, the toroidal direction is divided into blocks such that,within each block, the cells are field-aligned and a non-matching (non-conformal) grid interface is allowed at the block boundaries. In this paper we report on details of the numerical implementation and present preliminary results of verification studies performed for the case of the ion temperature gradient (ITG) instability in a sheared toroidal annulus geometry.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1608095
Report Number(s):
LLNL-JRNL--786885; 983844
Journal Information:
Contributions to Plasma Physics, Journal Name: Contributions to Plasma Physics Journal Issue: 5-6 Vol. 60; ISSN 0863-1042
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

References (15)

Progress with the COGENT Edge Kinetic Code: Implementing the Fokker-Planck Collision Operator: Progress with the COGENT Edge Kinetic Code: Implementing the Fokker-Planck Collision Operator journal June 2014
Continuum kinetic modelling of cross-separatrix plasma transport in a tokamak edge including self-consistent electric fields journal March 2018
Verification of 5D continuum gyrokinetic code COGENT: Studies of kinetic drift wave instability journal April 2018
An Eulerian gyrokinetic-Maxwell solver journal April 2003
Computing ITG turbulence with a full-f semi-Lagrangian code journal February 2008
Status and verification of edge plasma turbulence code BOUT journal June 2009
A flux-coordinate independent field-aligned approach to plasma turbulence simulations journal November 2013
A 5D gyrokinetic full- f global semi-Lagrangian code for flux-driven ion turbulence simulations journal October 2016
High-order discretization of a gyrokinetic Vlasov model in edge plasma geometry journal November 2018
On the definition of a kinetic equilibrium in global gyrokinetic simulations journal May 2006
On the influence of initial state on gyrokinetic simulations journal January 2008
Continuum kinetic modeling of the tokamak plasma edge journal May 2016
Cross-verification of the global gyrokinetic codes GENE and XGC journal June 2018
Comparisons and physics basis of tokamak transport models and turbulence simulations journal March 2000
Fast Low-to-High Confinement Mode Bifurcation Dynamics in a Tokamak Edge Plasma Gyrokinetic Simulation journal April 2017

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
finite-volume methods
gyrokinetics
tokamak edge