Dispersion of kinetic Alfven wave in a rotating plasma with an inhomogeneous magnetic field

作者：Liu, Y.^*; Teng, Y.

来源：Contributions to Plasma Physics, 2018, 58(1): 63-69.

DOI：10.1002/ctpp.201700057

• inhomogeneity
• kinetic Alfven wave
• rotating plasma

The effects of inhomogeneity of a magnetic field on the dispersion of kinetic Alfven waves (KAWs) in a rotating plasma is investigated under the framework of magnetohydrodynamic theory. The magnetic field should be in a non-uniform state if the centrifugal force is balanced only by the magnetic pressure. The inhomogeneity of the magnetic field increases the frequency of KAW and drives it into an unstable state. The growth rate of KAW varies non-monotonously with respect to the distance. The KAW will be excited in a certain region with maximum growth rate. And the growth rate of KAW in the region near and far from the centre of rotation approaches zero. These results will be helpful in understanding the properties of KAWs in rotating astrophysical and laboratory plasmas.

• 出版日期2018-1
• 单位南通大学