The properties of electron-beam propagation are reinvestigated, particularly concentrating on
high harmonic excitations caused by beam current modulation during propagation. A self-consistent
nonlinear theory of the current modulation in an intense el...
The properties of electron-beam propagation are reinvestigated, particularly concentrating on
high harmonic excitations caused by beam current modulation during propagation. A self-consistent
nonlinear theory of the current modulation in an intense electron beam propagating through a
reactive device is developed. The beam propagates downstream, executing space-charge oscillations
and experiencing an instability caused by a reactive device through the ac electric eld. A theoretical
model for the harmonic excitations in the beam current modulation is developed based on a selfconsistent
nonlinear theory. In the later stage of propagation, the modulation current has a cusped
waveform with a narrow peak which generates the high harmonics. The mode strength of high
harmonics increases to saturation as the beam propagates further downstream.