Propagation velocity of whistler-mode signals in an unstable and abnormally dispersive plasma-beam system

A propagation velocity of a whistler-mode signal in an unstable and abnormally dispersive plasma-beam system was investigated. Responses of the plasma in real time and space were computed by the inverse Fourier-Laplace transformation. The computed results of the propagation velocity are compared with various velocities analytically determined from the dispersion equation.