Dispersion and damping rates of dispersive Alfven wave in a nonextensive plasma

作者：Liu, Y.^*; Liu, S. Q.; Dai, B.; Xue, T. L.

来源：Physics of Plasmas, 2014, 21(3): 032125.

DOI：10.1063/1.4869243

• MAGNETOSPHERE
• ACCELERATION
• IONOSPHERE
• SPACECRAFT
• BOUNDARY
• AURORA

The dispersion and landau damping of the dispersive Alfven waves (DAW) have been studied in the plasma with nonextensive electrons and ions. The conditions for the existence of inertial Alfven waves (IAW) and kinetic Alfven waves (KAW) are modified by electrons' nonextensive parameter q(e). For IAW, beta(q) << m(e)/m(i); for KAW, m(e)/m(i) << beta(q) << 1, beta(q) is the ratio of the effective thermal pressure to the magnetic pressure. In the plasma with superthermal particles, the frequency of the IAW and KAW will increase with the increase of q(e) when the effective temperature of the plasma systems keeps invariant. Whereas the damping rates of the IAW and KAW vary inversely with respect to q(e) for the reason that the phase velocity of KAW is much smaller than the effective thermal velocity, while the phase velocity of IAW is much bigger than the effective thermal velocity.

• 出版日期2014-3
• 单位南昌大学; 南通大学