On the Effect of Focusing of Coherent Diffraction Radiation by a Semi-Parabolic Target

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发表日期：

2024年4月9日

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A. P. Potylitsyn,
A. V. Vukolov,
M. V. Shevelev,
A. A. Baldin,
V. V. Bleko,
V. V. Bleko,
V. V. Kobets,
P. V. Karataev,
V. R. Kocharyan

摘要

Abstract

Beam characteristics of a terahertz/subterahertz radiation obtained by collimation of coherent diffraction radiation (DR) emitted by ultrarelativistic electrons are considered. To achieve the maximum intensity on the beam axis of such radiation, it is proposed to use a semi-parabolic target with a focal length equal to the distance between the target and the collimator aperture. It is shown that for the proposed geometry, the DR distribution on the aperture plane has a maximum along the beam axis, in contrast to the previously used coherent transition radiation mechanism, which is characterized by a “funnel-shaped” structure with a minimum along the beam axis.