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Physics of Plasmas
A two-region model is proposed to study the effect of collisionality and magnetic geometry on electrostatic turbulence and on the propagation of filamentary coherent structures (blobs) in the edge and scrape-off-layer. The model invokes coupled vorticity and continuity equations in two different spatial regions along the magnetic field, taking into account the effect of magnetic field fanning and shear, e.g. near magnetic X-points. A linear dispersion relation for unstable modes illustrates thedoi:10.1063/1.2364858 fatcat:qjptc7uxrngaxmxhjgaq3w46ri