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XV International Symposium on "Radiation from Relativistic Electrons in Periodic Structures "RREPS-25"

15–19 Sept 2025
Asia/Shanghai timezone

Contacs

Radiation by an annular beam moves coaxially outside a dielectric ball

19 Sept 2025, 09:00
15m
Oral • General radiation properties from relativistic particles General radiation properties from relativistic particles

Speaker

Mrs Tatevik Hovhannisyan (Institute of Applied Problems of Physics NAS RA)

Description

We investigate the electromagnetic radiation generated by an annular beam moves coaxially outside a dielectric ball. We derive analytical formulas for the spectral and spectral-angular distributions of the emitted energy and provide numerical evaluations of the radiation spectrum. A central aim of this study is to identify the specific geometrical and material conditions under which electromagnetic radiation—especially Cherenkov radiation—is significantly amplified or attenuated, owing to the structural configuration and frequency-dependent properties of the medium. Employing the Green function formalism in conjunction with methods of complex analysis, we rigorously derive the spectral-angular characteristics of the radiation and establish optimization criteria for maximizing the field intensity within the GHz–THz frequency domain.

Authors

Prof. Aram Saharian (Institute of Applied Problems of Physics NAS RA) Mr Hayk Harutyunyan (Institute of Applied Problems of Physics NAS RA) Dr Hrant Khachatryan (Institute of Applied Problems of Physics NAS RA) Prof. Levon Grigoryan (Institute of Applied Problems of Physics NAS RA) Mrs Tatevik Hovhannisyan (Institute of Applied Problems of Physics NAS RA) Dr Vahram Parazian (Institute of Applied Problems of Physics NAS RA) Dr Vardazar Kotanjyan (Institute of Applied Problems of Physics NAS RA)

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