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Magnetic shear effect on zonal flow generation in ion-temperature-gradient mode turbulence

Lu He-Lin Chen Zhong-Yong Li Yue-Xun Yang Kai

Magnetic shear effect on zonal flow generation in ion-temperature-gradient mode turbulence

Lu He-Lin, Chen Zhong-Yong, Li Yue-Xun, Yang Kai
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  • Received Date:  12 August 2010
  • Accepted Date:  27 December 2010
  • Published Online:  05 April 2011

Magnetic shear effect on zonal flow generation in ion-temperature-gradient mode turbulence

  • 1. Department of Physics, Yunnan Nationalities University, Kunming 650031, China;
  • 2. School of Physics and Electronic Information Technology, Yunnan Normal University, Kunming 650092, China

Abstract: By decoupling the nonlinear fluid equations of ion-temperature-gradient (ITG) mode, the zonal flow-drift wave nonlinear dynamical equation including magnetic shear is derived. The role of magnetic shear for zonal flow generation by ITG mode turbulence is studied using a four-wave interaction model of modulational instability. Finally we can draw the conclusion that within a smaller range of k//, as |k//| increases, the growth rate of zonal flow is also increased.

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