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

A.P. Potylitsyn^†^a, b, D.Yu. Sergeeva^c, a, d, M.N. Strikhanov^a, A.A. Tishchenko^c, a, d
^aNational Research Nuclear University ‘MEPhI’, Kashirskoe shosse 31, Moscow, 115409, Russian Federation
^bNational Research Tomsk Polytechnic University, prosp. Lenina 30, Tomsk, 634050, Russian Federation
^cNational 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 v_SL. Such radiation is generated if the condition v_SL > c is fulfilled, which is the conventional 'threshold' Cherenkov condition.

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/
Web of Science

000537856300005
Scopus

2-s2.0-85086630919
ADS NASA

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, accepted: 4th, October 2019

Оригинал: Потылицын А П, Сергеева Д Ю, Стриханов М Н, Тищенко А А «Дифракционное излучение заряда как излучение сверхсветового источника в вакууме» УФН 190 329–335 (2020); DOI: 10.3367/UFNr.2019.10.038667