Scrape-Off Layer Turbulence Theory and Simulations

Verification methodology for plasma simulations and application to a scrape-off layer turbulence code

I These equations are implemented in GBS, a 3D, flux-driven, global turbulence code with circular geometry, and the system is closed by the Poisson’s equation ω = ∇⊥φ [Ricci et al., PPCF 2012] I System is completed with a set of first-principles boundary conditions applicable at the magnetic pre-sheath entrance where the magnetic field lines intersect the limiter [Loizu et al., PoP 2012]: v‖i =...

Finite ion temperature effects on scrape-off layer turbulence

Plasma shaping effects on tokamak scrape-off layer turbulence

The impact of plasma shaping on tokamak scrape-off layer (SOL) turbulence is investigated. The drift-reduced Braginskii equations are written for arbitrary magnetic geometries, and an analytical equilibrium model is used to introduce the dependence of turbulence equations on tokamak inverse aspect ratio ( ), Shafranov’s shift (∆), elongation (κ), and triangularity (δ). A linear study of plasma ...

Aspect ratio effects on limited scrape-off layer plasma turbulence

Blob properties in full-turbulence simulations of the TCV scrape-off layer

To investigate blob properties in the tokamak scrape-off layer (SOL), we perform dedicated numerical nonlinear simulations of plasma turbulence in the SOL of a TCV discharge using the Global Braginskii Solver code. A blob detection technique is used for the first time in a threedimensional (3D) full-turbulence simulation to track the motion of the filaments in the SOL. The specific size, densit...