Limiting Energy Loss Distributions for Multiphoton Channeling Radiation

TL;DR

This paper reviews the theory of multiphoton spectra in coherent radiation sources, focusing on channeling radiation, and discusses the limiting shapes of spectra at high intensity and their relation to electron motion.

Contribution

It introduces new insights into the limiting shapes of multiphoton spectra in channeling radiation and highlights the importance of resummation and averaging procedures.

Findings

Limiting shapes of multiphoton spectra at high intensity are characterized.

An approximate link between radiative energy loss and electron integrals of motion is identified.

The importance of resummation order and averaging in spectral calculations is demonstrated.

Abstract

Recent results in the theory of multiphoton spectra for coherent radiation sources are overviewed, with the emphasis on channeling radiation. For the latter case, the importance of the order of resummation and averaging is illustrated. Limiting shapes of multiphoton spectra at high intensity are discussed for different channeling regimes. In some spectral regions, there emerges an approximate correspondence between the radiative energy loss and the electron integrals of motion.