Coupling Instability of a Warm Relativistic Electron Beam with Ion-Channel Guiding

A. Rostami,K. Hajisharifi,H. Mehdian,A. Hasanbeigi

Fig. 1 (Color online) (a) Real and (b) imaginary parts of the refractive index versus the normalized frequency at the $\bar{r}=0.02$ for the chosen parameters of system as $\gamma_0=3, n_{b0}=10^{18} {\rm m } ^{-3}$, and $T=10^{6}\,^{\rm o }{\rm K }$.