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A gyrokinetic model with integral eigenmode equations is developed based on thelocal equilibrium of shaped tokamak plasmas.Effects of main geometric parameters (finite aspectratio,elongation,triangularity,and Shafranov shift gradient) on the electrostatic electron temper-ature gradient (ETG) driven modes are investigated numerically.It is found that the finite aspectratio has a general stabilizing effect,while the elongation can be either stabilizing or destabilizing,depending on the poloidal wavelength of the mode and other parameters.It is shown that a lowaspect ratio enhances the stabilizing effect of elongation,and weakens its destabilizing effect aswell.
A gyrokinetic model with integral eigenmode equations is developed based on the local equilibrium of shaped tokamak plasmas. Effects of the main geometric parameters (finite aspect ratio, elongation, triangularity, and Shafranov shift gradient) on the electrostatic electron temper-ature gradient (ETG) driven modes are investigated numerically. It is found that the finite aspectratio has a general stabilizing effect, while the elongation can be either stabilizing or destabilizing, depending on the poloidal wavelength of the mode and other parameters. It is shown that a low aspect ratio enhances the stabilizing effect of elongation, and weakens its destabilizing effect aswell