Characterization of the beamstrahlung radiation at the future high-energy circular collider

Abstract

Beamstrahlung is a dominant effect in the beam dynamics of the high luminosity next-generation lepton collider FCC-ee. We characterize the beamstrahlung radiation for the beam parameters at the four working energies, from the Z-pole to the tt[over ¯] threshold, and present the effect of this radiation in the machine-detector-interface region. We discuss the conceptual need for a photon dump due to the high power produced, which is in the order of hundreds of kilowatts. We also discuss the detector induced backgrounds due to the incoherent e^{+}e^{-} pairs produced by the interaction of the beamstrahlung photons at the interaction point.