Radiation Damping by Thomson Scattering

TL;DR

This paper explores how Thomson scattering in periodic electromagnetic fields can reduce quantum excitation and damping times of betatron oscillations in relativistic electrons, potentially improving storage ring performance.

Contribution

It introduces a novel approach to damping using Thomson scattering, modifying existing radiation integrals to account for this process.

Findings

Thomson scattering can significantly reduce quantum excitation.

Modified radiation integrals better describe damping via Thomson scattering.

Potential for improved beam stability in storage rings.

Abstract

Synchrotron radiation of relativistic electrons in storage rings naturally leads to the process of damping of betatron oscillations. Damping time and transverse beam emittance can be reduced by wigglers or undulators while the beam parameters are still well defined by the common radiation integrals, based on the properties of synchrotron radiation. However, the quantum excitation of betatron oscillations in principle can be considerably reduced if an electron radiation occurs due to the Thomson scattering in the periodic electromagnetic field. After a brief introduction we compare radiation properties for different cases and suggest the modification of the radiation integrals.