New Electron-Wave Amplitude Oscillation due to an Initial Spatial Disturbance

概要

論文の詳細を見る
When an initial disturbance in a plasma is so strong that f_o(λ) (f_o(v) : unperturbed distribution, λ : phase velocity) and g(λ) cos kx (g(v) cos kx : disturbance) are of the same order, the spatial inhomogeneity represented by the latter causes a new type of amplitude oscillation while the usual amplitude oscillation predicted by O'Neil is not sensitive whether g(λ) = 0 or not. This is due to the fact that the initial spatial disturbance survives around λ unsubjected to phase mixing for some time. The most remarkable feature of this oscillation is that the amplitude almost always remains larger than the initial one. The maximum amplitude of an electric field E is nearly E_o(1 + 2φ_o^2) where φ_o = ω^2_Dω_<pe>/ω^3_B, ω^2_D = 4πe^2g(λ)v_<TR>/m, v_<TR> = ω_B/k and ω_B is the bouncing frequency of the electron.
核融合科学研究所の論文