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Small-Scale Turbulence in a Closed-Field-Line Geometry
Physical Review Letters
Plasma turbulence due to small-scale entropy modes is studied with gyrokinetic simulations in a simple closed-field-line geometry, the Z pinch, in low-parameter regimes that are stable to ideal interchange modes. We find an enormous variation in the nonlinear dynamics and particle transport as a function of two main parameters, the density gradient and the plasma collisionality. This variation is explained in part by the damping and stability properties of spontaneously formed zonal flows indoi:10.1103/physrevlett.97.245001 pmid:17280294 fatcat:sjx4ytxbzvhntfa7lkoe7rlmni