Physics – Accelerator Physics
Scientific paper
2010-06-21
Journal of Physics: Conference Series 236 (2010) 012010
Physics
Accelerator Physics
Submitted to Journal of Physics: Conference Series
Scientific paper
10.1088/1742-6596/236/1/012010
The Smith-Purcell radiation is usually measured when an electron passes over the grating of metallic stripes. However, for high frequencies (exceeding the plasma frequency of the grating material) none material could be treated as a conductor, but ought to be considered as a dielectric with plasma-like permittivity. So for describing Smith-Purcell radiation in the range of high frequencies new theoretical approaches are needed. In the present paper we apply the simple variant of eikonal approximation developed earlier to the case of radiation on the set of parallel semi-infinite dielectric plates. The formulae obtained describe the radiation generated by the particles both passing through the plates (traditionally referred as "transition radiation") and moving in vacuum over the grating formed by the edges of the plates (traditionally referred as "diffraction radiation", and, taking into account the periodicity of the plates arrangement, as Smith-Purcell radiation).
Shul'ga N. F.
Syshchenko V. V.
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