Propagation of a relativistic electron beam in a magnetic field

[[abstract]]Injection of a relativistic electron beam into a fully ionized plasma in a strong magnetic field has been studied using a one-dimensional particle simulation model. Electron beams of finite pulse length and of pulsed injection are followed in time to study the effects of beam-plasma interactions on the beam propagation. It is found that the beam cannot propagate into a plasma with a density close to the beam density, because the beam energy cannot overcome the build-up potential. When the beam density is decreased, significant plasma electron energy increases due to acceleration by the injection field. The Landau damping effects due to the ambient elections increase as the beam energy increases. It is shown that the electric field generated by the beam-plasma instability accelerates the ambient electrons opposite to the beam propagation, which is also shown in nonrelativistic beam injection studies[[fileno]]2060101030005[[department]]工程與系統科學