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Issue 12, 2025
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On the 270th Anniversary of the M.V. Lomonosov Moscow State University (MSU). Methodological notes


Stimulated Cherenkov effect and dissipative-radiative instabilities in superluminal motion of a relativistic electron beam in a layered medium

† 
Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1 build. 2, Moscow, 119991, Russian Federation

Dissipative—radiative instabilities and instabilities caused by the stimulated Cherenkov effect of a relativistic electron beam in an unbounded layered electrodynamic system are considered. While for the stimulated Cherenkov effect the beam energy is used to excite waves in the electrodynamic system, for dissipative—radiative instabilities, the beam energy is radiated away from the system to infinity. Such irreversible energy transfer from the beam manifests itself as a kind of effective dissipation and makes the dissipative—radiative instability an analogue of the usual dissipative beam instability in a system without radiation. Growth rates and frequency ranges of the instabilities are found for various structures of layered electrodynamic systems, including plasma systems.

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Fulltext is also available at DOI: 10.3367/UFNe.2025.01.039850
Keywords: relativistic electron beams, stimulated Cherenkov effect, dissipative—radiative instability
PACS: 41.60.−m, 52.35.−g, 52.40.Mj (all)
DOI: 10.3367/UFNe.2025.01.039850
URL: https://ufn.ru/en/articles/2025/4/h/
001513421700007
2-s2.0-105006750244
2025PhyU...68..408K
Citation: Kuzelev M V "Stimulated Cherenkov effect and dissipative-radiative instabilities in superluminal motion of a relativistic electron beam in a layered medium" Phys. Usp. 68 408–424 (2025)
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Received: 3rd, March 2024, revised: 27th, January 2025, 27th, January 2025

Оригинал: Кузелев М В «Вынужденный эффект Черенкова и диссипативно-излучательные неустойчивости при сверхсветовом движении релятивистского электронного пучка в слоистой среде» УФН 195 432–449 (2025); DOI: 10.3367/UFNr.2025.01.039850

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