The plasma filamentation instability (FI), also known as the beam-Weibel instability, is responsible for the generation of magnetic fields and the acceleration of particles within collisionless astrophysical plasmas. In the present study, we employ Particle-In-Cell (PIC) simulation to model the filamentation instability driven by sub-relativistic electron-positron counter-streaming pairs in one spatial dimension moving with velocity […]
AbstractIn this paper, the new slow-wave structure called wave-ring helix to enhance the power of the traveling wave tubes is introduced. In this new structure, without increasing the length and radius of the helix, the wave motion path can be increased to radiofrequency wave in phase with the electron beam. The results show that in […]
