  The resonance Cherenkov radiation generated from a train of equally-spaced
unidimensional electron bunches travelling along the axis of a hollow channel
inside an infinite cylindrical waveguide filled with (weakly dispersing)
transparent dielectric has been investigated. It was shown that its excitation
might be stimulated at a large number of neighboring modes of the waveguide. A
visual explanation of this effect is given and the possibility of its
observation in the range of terahertz radiation is discussed.
