Focusing of Electron Bunches Wake Fields in a Plasma-Dielectric Waveguide
Abstract
The excitation of wake waves by the electron bunch in an isotropic plasma-dielectric waveguide is studied. It is shown that the excited field consists of two components: the field of the Langmuir wave and the field of eigenmodes of a dielectric waveguide. At a certain plasma density, the longitudinal component of the Langmuir waves is much smaller longitudinal component of the dielectric waves and transverse field components of the Langmuir wave is much larger transverse components of the dielectric waves. The periods of these two types of waves differ significantly. This allows to provide the acceleration of the test bunch by a field of the dielectric wave with its simultaneous focusing by the plasma wave field.
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References
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