The Landau-Pomeranchuk-Migdal effect and transition radiation in structured targets

TL;DR

This paper investigates the radiation emitted by high-energy electrons passing through structured targets composed of multiple plates, analyzing the combined effects of the LPM effect, medium polarization, and boundary radiation on the spectrum.

Contribution

It derives a general expression for the radiation spectrum from N-plate targets considering multiple physical effects and provides a qualitative analysis of the interference patterns.

Findings

Derived a comprehensive formula for radiation spectrum in multi-plate targets

Analyzed the interplay of LPM effect, polarization, and boundary radiation

Provided qualitative insights into interference patterns in structured targets

Abstract

The radiation from high-energy electrons is investigated for the case when a target consists of several separated plates. The spectrum of radiation is considered in the region in which the bremsstrahlung is under influence of the multiple scattering of a projectile (the LPM effect), the polarization of a medium and the hard part of the boundary radiation contribute. In this region the general expression for the radiation spectrum is obtained for the $N$-plate target. A qualitative description of the arising interference pattern is given.