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Boundary plasma physics plays an important role in tokamak confinement, butis difficult to simulate in a gyrokinetic code due to the scale-inseparablenonlocal multi-physics in magnetic separatrix and open magnetic field geometry.Neutral particles are also an important part of the boundary plasma physics. Inthe present paper, noble electrostatic gyrokinetic techniques to simulate theflux-driven, low-beta electrostatic boundary plasma is reported. Gyrokineticions and drift-kinetic electrons are utilized without scale-separation betweenthe neoclassical and turbulence dynamics. It is found that the nonlinearintermittent turbulence is a natural gyrokinetic phenomenon in the boundaryplasma in the vicinity of the magnetic separatrix surface and in the scrape-offlayer.

Electrostatic gyrokinetic simulation of global tokamak boundary plasma and the generation of nonlinear intermittent turbulence