This article is cited in 1 paper

METHODOLOGICAL NOTES

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

A. P. Potylitsyn^ab, D. Yu. Sergeeva^bcd, M. N. Strikhanov^b, A. A. Tishchenko<sup>bcd

a</sup> National Research Tomsk Polytechnic University
^b National Research Nuclear University MEPhI, Moscow
^c National Research Centre "Kurchatov Institute", Moscow
^d Laboratory of Radiation Physics, Belgorod State National Research University

Abstract: 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 $v _{\rm SL}$. Such radiation is generated if the condition $v _{\rm SL}$>$c$ 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

Received: April 24, 2019
Revised: October 1, 2019
Accepted: October 4, 2019

DOI: 10.3367/UFNr.2019.10.038667

 English version: Physics–Uspekhi, 2020, 63:3, 303–308

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