Nonlinear Theory of Collision-Induced Instability of Partially Ionized Gases in External Magnetic Field

抄録

Nonlinear characteristics of the collision-induced instability of partially ionized gases which have a large Ramsauer effect are investigated. Right-handed polarized waves propagating along the external magnetic field are considered. Calculations are made on the nonlinear interactions between waves of different wave numbers, using the assumption that the velocity distribution function of electrons stays a delta function in the course of time. The results show that in contrast to the nonlinear Landau damping of plasma waves where the energy flow is directed towards the region of small k, in the present case the wave energies transfer towards the lower frequency side as seen from the coordinate system rotating with the gyrating electron.