Challenging luminosity measurements at the Electron-Ion Collider

TL;DR

This paper discusses the significant challenges in accurately measuring luminosity at the Electron-Ion Collider, focusing on beam effects, radiation mitigation, and high event rates, and proposes a basic measurement setup.

Contribution

It introduces a preliminary luminosity measurement layout for the EIC that addresses key challenges and discusses uncertainties of proposed methods.

Findings

Identified main challenges in luminosity measurement at EIC.

Proposed a basic detector setup to address these challenges.

Discussed uncertainties associated with three measurement methods.

Abstract

A precise determination of absolute luminosity, using the bremsstrahlung process, at the future Electron-Ion Collider (EIC) will be very demanding, and its three major challenges are discussed herein. First, the bremsstrahlung rate suppression due to the so-called beam size effect has to be well controlled. Secondly, the impact of huge synchrotron radiation fluxes should be mitigated. Thirdly, enormous bremsstrahlung event rates, in excess of 10 GHz, have to be coped with. A basic layout of the luminosity measurement setup at the EIC, addressing these issues, is proposed, including preliminary detector technology choices. Finally, the uncertainties of three proposed methods are also discussed.