Acceleration Radiation for Orbiting Electrons

TL;DR

This paper analyzes the radiation effects on an electron with spin in circular acceleration, revealing time-dependent interactions and explaining residual polarization phenomena in storage rings.

Contribution

It provides a detailed analysis of spin-radiation interactions for electrons in circular motion, clarifying complex polarization effects and radiation spectra.

Findings

Interaction of spin with spatial motion is time-dependent

Explains residual polarization in electrons

Radiation emitted in pairs from accelerating detectors

Abstract

This paper presents an analysis of the radiation seen by an observer in circular acceleration, for a magnetic spin. This is applied to an electron in a storage ring, and the subtilty of the interaction of the spin with the spatial motion of the electron is explicated. This interaction is shown to be time dependent (in the radiating frame), which explains the strange results found for the electron's residual polarisation in the literature. Finally, some brief comments about the radiation emitted by an accelerating detector are made where it is shown that the spectrum is correlated in that particles are emitted in pairs.