Global gyrokinetic particle simulations show that equilibrium radial electric field (Er) shear reduces the linear growth rate, ion heat conductivity, and nonlinear turbulence amplitude for both the ion temperature gradient (ITG) and kinetic ballooning mode (KBM) microturbulence by tilting the poloidal mode structure. The increase in the magnetic shear enhances the stabilizing performance of the Er shear on linear growth rate for the ITG case but has no effect on that for the KBM case. The radial correlation length of the ITG turbulence is decreased by increasing the magnetic shear in a weak ion diamagnetic flow shear condition with low β, leading to a reduction in the effective E × B shearing rate, which weakens the suppression performance of the Er shear on the ITG turbulence amplitude. In contrast, under a larger ion diamagnetic shear flow for higher β, an increase in magnetic shear strengthens the suppression performance of the Er shear on the KBM turbulence amplitude due to an increase in the effective shearing rate by increasing the radial correlation length of the turbulence.
全球回旋动理学粒子模拟表明，平衡径向电场（Er）剪切通过倾斜极向模结构，降低了离子温度梯度（ITG）和动力学气球模（KBM）微观湍流的线形成长率、离子热导率及非线性湍流幅度。磁剪切的增加增强了Er剪切对ITG模线形成长率的抑制效果，但对KBM模则无影响。在低β条件下，弱离子逆磁剪切流中，磁剪切的增加使ITG湍流的径向相关长度减小，从而导致有效E×B剪切率降低，进而削弱了Er剪切对ITG湍流幅度的抑制效果。相反，在较高β条件下，较大离子逆磁剪切流中，磁剪切的增加通过增大湍流的径向相关长度而提高了有效剪切率，从而增强了Er剪切对KBM湍流幅度的抑制效果。