Speaker
Description
The Future Circular electron-positron Collider (FCC-ee) is a design study for a 90.7 km circumference high-luminosity and high-energy e+e- collider. In electron and positron machines, the Touschek effect can cause large transverse-to-longitudinal momentum exchange, leading to particle losses that can limit the beam lifetime and produce distinct beam loss patterns. A quantitative assessment of this mechanism is therefore essential to identify regions potentially exposed to Touschek-induced losses and to determine its impact on the beam lifetime relative to other lifetime-limiting processes. This paper presents a study of the Touschek effect in the FCC-ee, performed using a Monte Carlo Touschek-scattering simulation routine newly implemented in the Xsuite framework. The results include Touschek-lifetime estimates for the FCC-ee and an evaluation of the arising beam loss patterns. The performance of the FCC-ee beam collimation system to safely dispose of Touschek losses is also assessed.
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