Stimulated excitation of resonant Cherenkov radiation at a large number of neighbouring waveguide modes

Abstract

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.

7 pages, 3 figures, oral report at the Int. Conf. on "Electron, positron, neutron and X-ray scattering under external influences", Yerevan-Meghri, Armenia, 19-22 Oct., 2011