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Diffraction radiation from a charge as radiation from a superluminal source in a vacuum

  a, b,  c, a, d,  a,  c, a, d
a National Research Nuclear University MEPhI, Kashirskoe shosse 31, Moscow, 115409, Russian Federation
b National Research Tomsk Polytechnic University, prosp. Lenina 30, Tomsk, 634050, Russian Federation
c National Research Centre Kurchatov Institute, pl. akad. Kurchatova 1, Moscow, 123182, Russian Federation
d  Laboratory of Radiation Physics, Belgorod National Research University, , 308034, Belgorod, Russia, Koroleva str. 2a, build. 4, off. 215, Belgorod, 308034, Russian Federation

An analysis of spectral-angular characteristics of diffraction radiation, both incoherent and coherent, has been performed. It is shown that radiation processes can be interpreted as Cherenkov radiation, which is produced by a region of dynamic polarization moving along a target edge with superluminal velocity vSL. Such radiation is generated if the condition vSL > c is fulfilled, which is the conventional 'threshold' Cherenkov condition.

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Fulltext is also available at DOI: 10.3367/UFNe.2019.10.038667
Keywords: diffraction radiation, transition radiation, superluminal source, beam diagnostics, THz radiation
PACS: 41.60.−m, 42.25.−p, 42.25.Kb (all)
DOI: 10.3367/UFNe.2019.10.038667
URL: https://ufn.ru/en/articles/2020/3/e/
000537856300005
2-s2.0-85086630919
2020PhyU...63..303P
Citation: Potylitsyn A P, Sergeeva D Yu, Strikhanov M N, Tishchenko A A "Diffraction radiation from a charge as radiation from a superluminal source in a vacuum" Phys. Usp. 63 303–308 (2020)
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Received: 24th, April 2019, revised: 1st, October 2019, 4th, October 2019

:   ,   ,   ,    « » 190 329–335 (2020); DOI: 10.3367/UFNr.2019.10.038667

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