Document Type
Article
Publication Date
12-15-2006
Publication Title
Physical Review Letters
Department
Department of Physics and Astronomy
Abstract
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-β 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 in the system. As in toroidal systems, the zonal flows can lead to a strong nonlinear suppression of transport below a critical gradient that is determined by the stability of the zonal flows.
DOI
10.1103/PhysRevLett.97.245001
Original Citation
Ricci P, Rogers BN, Dorland W. Small-scale turbulence in a closed-field-line geometry. Phys Rev Lett. 2006 Dec 15;97(24):245001. doi: 10.1103/PhysRevLett.97.245001. Epub 2006 Dec 15. PMID: 17280294.
Dartmouth Digital Commons Citation
Ricci, Paolo; Rogers, B. N.; and Dorland, W., "Small-Scale Turbulence in a Closed-Field-Line Geometry" (2006). Dartmouth Scholarship. 3273.
https://digitalcommons.dartmouth.edu/facoa/3273
