Generation of Trapped-Particle Modes with Well-Defined Initial Conditions by Injection of Electron Packets in a Plasma Wave

This paper gives preliminary experimental results on synchronous injection of electron packets in the potential trough of an electrostatic plasma wave, and the trapped-particle modes which are generated. The initial conditions, wave amplitude, electron packet density, and phase of the packets with respect to the wave, may be varied independently and lead to detailed comparison with a recently developed theory.