On the status of channeling radiation and laser based radiation sources

TL;DR

This paper unifies the description of channeling radiation in crystals and laser-based radiation sources using Lorentz-invariant parameters, highlighting fundamental differences and potential for studying QED in strong fields.

Contribution

It introduces a unified Lorentz-invariant framework for describing both channeling radiation and laser radiation sources, clarifying their differences and applications.

Findings

Distinct relationships between invariants in CR and LRS.

Limitations on invariant values in oriented crystals.

Potential to study QED processes in strong external fields.

Abstract

A unified description of channeling radiation (CR) in oriented crystals (OC) and radiation in the field of an intense plane wave (laser radiation sources - LRS) is proposed in terms of two Lorentz-invariant parameters. The case of planar positron channeling (quasi-channeling) and linearly polarized laser wave is considered in detail up to TeV energies. The crucial difference between LRS and CR is that in the former case both invariants are independent, while in channeling they are linearly related to each other. This leads to a strong limitation on the range of possible values of these invariants in OC. On the other hand, OC make it possible to study QED processes in strong non-uniform external fields.