Averaging of Spontaneous Radiation in Relativistic Strophotron

TL;DR

This paper investigates how the initial conditions of electrons in a relativistic strophotron affect the spectral lines of spontaneous radiation, revealing significant inhomogeneous broadening and weak resonance structures after averaging.

Contribution

It demonstrates that initial electron conditions cause broadening of spectral lines, and shows how averaging over these conditions diminishes resonance features.

Findings

Spectral lines are broadened due to initial condition dependence.

Averaging over initial conditions weakens resonance structures.

Spectral intensity becomes smoother after averaging.

Abstract

The main resonance frequency is shown to depend on the initial conditions of the electron, and in particular on its initial transversal coordinate xo. This dependence is shown to give rise to a very strong inhomogeneous broadening of the spectral lines. The broadening can become large enough for the spectral lines to overlap with each other. The spectral intensity of a spontaneous emission is averaged over xo. The averaged spectral intensity is shown to have only a very weakly expressed resonance structure.