Some features of electromagnetic field of charged particle revolving about dielectric ball

TL;DR

This paper investigates the electromagnetic fields of a relativistic electron revolving around a dielectric ball, revealing enhanced Cherenkov radiation and non-localized field distributions compared to infinite media.

Contribution

It introduces the phenomenon of intensified Cherenkov radiation from a particle orbiting a dielectric sphere and analyzes the non-localized electric and magnetic fields.

Findings

Cherenkov radiation can be tens of times more intense near the dielectric ball.

Electric and magnetic fields are not localized at the center or poles of the ball.

Field strengths are distributed throughout the equatorial plane and near the poles.

Abstract

A relativistic electron uniformly rotating along an equatorial orbit around a dielectric ball may generate Cherenkov radiation tens of times more intense as that in case of revolution of a particle in a continuous, infinite and transparent medium. The root-mean-square values of electric and magnetic field strengths of particle are practically not localized in the central part of the equatorial plane of ball and close to the poles of ball.