Electron beam polarimeter and energy spectrometer

TL;DR

This paper proposes a novel Compton polarimeter that uses laser backscattering to measure electron beam polarization and energy with high accuracy, demonstrated through Monte Carlo simulations for the FCC-ee project.

Contribution

It introduces a new concept of a Compton polarimeter capable of measuring both polarization and energy of electron beams, enhancing existing techniques.

Findings

Successfully simulated the polarimeter's performance for FCC-ee.

Showed accurate measurement of electron beam polarization and energy.

Demonstrated potential for improved beam diagnostics.

Abstract

The backscattering of laser radiation by a relativistic electron beam is a widely used method for measuring the spin polarization of electrons. We consider again the properties of the scattering process paying special attention to recoil electrons. Based on this consideration we propose the concept of the Compton polarimeter in which, in addition to all the polarization components, it becomes possible to accurately measure the energy and other parameters of the electron beam. To demonstrate the capabilities of the method we conduct a Monte Carlo simulations of the polarimeter developed for the FCC-ee project.