Gyrokinetic simulation of turbulence driven geodesic acoustic modes in edge plasmas of HL-2A tokamak
- Southwestern Institute of Physics, Chengdu 610041 (China)
- Department of Physics and Astronomy, University of California, Irvine, California 92697 (United States)
Strong correlation between high frequency microturbulence and low frequency geodesic acoustic mode (GAM) has been observed in the edge plasmas of the HL-2A tokamak, suggesting possible GAM generation via three wave coupling with turbulence, which is in turn modulated by the GAM. In this work, we use the gyrokinetic toroidal code to study the linear and nonlinear development of the drift instabilities, as well as the generation of the GAM (and low frequency zonal flows) and its interaction with the turbulence for realistic parameters in the edge plasmas of the HL-2A tokamak for the first time. The simulation results indicate that the unstable drift wave drives strong turbulence in the edge plasma of HL-2A. In addition, the generation of the GAM and its interaction with the turbulence are all observed in the nonlinear simulation. The simulation results are in reasonable agreement with the experimental observations.
- OSTI ID:
- 21531973
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 11 Vol. 17; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BOUNDARY LAYERS
CLOSED PLASMA DEVICES
DIFFERENTIAL GEOMETRY
DRIFT INSTABILITY
GEOMETRY
HL-2A TOKAMAK
INSTABILITY
LAYERS
MATHEMATICS
PLASMA
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
PLASMA SIMULATION
SIMULATION
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TURBULENCE
WAVE PROPAGATION