Abstract
The Landau–Lifshitz (LL) equation has been proposed as the classical equation to describe the dynamics of a charged particle in a strong electromagnetic field when influenced by radiation reaction. Until recently, there has been no clear experimental verification. However, aligned crystals have remedied the situation: here, as in Nielsen et al CERN NA63 Collaboration (2020 Phys. Rev. D 102 052004), we report on a quantitative experimental test of the LL equation by measuring the emission spectra of electrons and positrons penetrating aligned single crystals. The recorded spectra are in remarkable agreement with simulations based on the LL equation of motion with moderate quantum corrections for recoil and, in the case of electrons in axially aligned crystals, spin and reduced radiation intensity.
Highlights
Under typical experimental conditions the energy radiated by an accelerated charged particle is negligible compared to its kinetic energy
In this paper we report on recent experimental investigations of radiation reaction in single crystals
In this paper we summarize an experimental verification of the validity of the LL equation by utilizing the strong fields of an aligned single crystal experienced by penetrating high-energy electrons and positrons
Summary
C F Nielsen1,∗ , J B Justesen , A H Sørensen, U I Uggerhøj , R Holtzapple and CERN NA63.
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