Investigation of ITG turbulence in cylinder geometry within a gyrokinetic global PIC simulation: influence of zonal flows and a magnetic well
A gyrokinetic global nonlinear particle-in-cell (PIC) method is applied to calculate ion-temperature-gradient (ITG) driven turbulence and the resulting anomalous heat transport in a Theta-pinch. The level of turbulence and transport are strongly decreased by poloidal zonal ExB flows. The radial electric field, Er, leading to these zonal flows is generated by the turbulence. Thus, a magnetic field with a well according to finite-Beta equilibrium and leading to a decrease in the linear growth rates of ITG-modes influences the formation of the radial electric field. The gyrokinetic global nonlinear TORB code has been modified to investigate the consequences for the turbulence level.
Bibliographic Reference: An article published in: Plasma Physics and controlled Fusion 46 (2004) pp. 535-549
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://www.iop.org/EJ/S/UNREG/journal/0741-3335
Record Number: 200417555 / Last updated on: 2004-06-17
Original language: en
Available languages: en