论文标题
有限$β$对短波长离子温度梯度模式的影响
Finite $β$ Effects on Short Wavelength Ion Temperature Gradient Modes
论文作者
论文摘要
使用全局陀螺仪模型，首次在线性状态下以线性状态的离子温度梯度模式的短波长分支研究了电磁效应。在有限等离子体$β$的电磁扰动的情况下，发现短波长离子温度梯度模式的生长速率在存在电磁扰动的情况下降低。发现对实际频率的影响很弱。由于$β$的幅度增加，因此发现该模式的阈值$η_i$的阈值增加。将离子温度梯度模式的短波长分支的全局模式结构与常规分支进行了比较。该模式的磁特征被认为是电磁电位与静电电势的模式平均平方值之比，随着等离子体$β$的增加的增加而增加。通量的混合长度估计表明，最大贡献仍然来自长波长模式。随着$β$的增加，通量的大小降低。
The electromagnetic effect is studied on the short wavelength branch of the ion temperature gradient mode in the linear regime for the first time using a global gyrokinetic model. The short wavelength ion temperature gradient mode growth rate is found to be reduced in the presence of electromagnetic perturbations at finite plasma $β$. The effect on real frequency is found to be weak. The threshold value of $η_i$ is found to increase for the mode as the magnitude of $β$ is increased. The global mode structure of the short wavelength branch of the ion temperature gradient mode is compared with the conventional branch. The magnetic character of the mode, measured as the ratio of mode average square values of electromagnetic potential to electrostatic potential, is found to increase with increasing values of the plasma $β$. The mixing length estimate for flux shows that the maximum contribution still comes from the long wavelengths modes. The magnitude of the flux decreases with increasing $β$.
