Status and verification of edge plasma turbulence code BOUT

The BOUT code is a detailed numerical model of tokamak edge turbulence based on collisional plasma fluid equations. BOUT solves for time evolution of plasma fluid variables: plasma density NiNi, parallel ion velocity V‖iV‖i, electron temperature TeTe, ion temperature TiTi, electric potential ϕ  , parallel current j‖j‖, and parallel vector potential A‖A‖, in realistic 3D divertor tokamak geometry. The current status of the code, physics model, algorithms, and implementation is described. Results of verification testing are presented along with illustrative applications to tokamak edge turbulence.