Doppler effect in vacuum, homogeneous, and periodical media in X-ray range

Le résumé fourni par la source

This paper discusses the Doppler effect for radiation emitted by a relativistic oscillator in vacuum describedgeometrically as an ellipsoid in momentum space. Spectral and angular properties of the Doppler X-ray radiationemitted by a relativistic oscillator moving through a homogeneous medium are considered. Additionally, weshow that radiation from an elementary relativistic charged particle interacting with periodic medium can beinterpreted as a manifestation of the Doppler effect. Examples include parametric X-ray radiation, coherentbremsstrahlung, undulator radiation in crystalline or vacuum undulators, transition radiation from stacked foils,and Smith-Purcell radiation.

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