On the surface wave generation in solid state plasma

We consider the excitation of a generator, based on the surface wave in solid-state plasma, by a relativistic electron beam propagating in a gas plasma. In a real experiment, there is usually residual gas above the surface of the solid which is ionized by the beam and forms a gas plasma. The gas plasma can also be created independently by using an additional weak beam, laser ray, etc. This makes it possible to control the parameters of the gas plasma. We consider the effect of parameters of the beam on the characteristics of the generator. It is shown that a relatively dense gas plasma effects strongly the electrodynamic properties of the generator. The generation frequency is practically independent of the energy of the beam, and remains at a sufficiently high level. The magnitude of the starting current decreases.