Collimation simulations for the FCC-ee
Journal of Instrumentation IOP Publishing 19:02 (2024) T02004-T02004
Authors:
A Abramov, G Broggi, R Bruce, F Carlier, M Hofer, G Iadarola, LJ Nevay, T Pieloni, M Rakic, S Redaelli, SM White
Abstract:
Abstract
The collimation system of the Future Circular Collider,
operating with leptons (FCC-ee), must protect not only the
experiments against backgrounds, but also the machine itself from
beam losses. With a 17.8 MJ stored energy of the electron and
positron beams, they are highly destructive, and beam losses risk to
cause damage or a quench of superconducting elements. Accurate
collimation simulation tools and models are needed to design the
collimation system and optimize the collimation performance,
including magnetic tracking, synchrotron radiation and optics
tapering, as well as particle-matter interactions. As no existing
code was found that incorporated all these features, a new
simulation software tool has been developed. The tool is based on an
interface between a particle tracking engine, pyAT or Xtrack, and a
Monte-Carlo particle-matter interaction engine for collimator
scattering, BDSIM, which is based on Geant4. Results from a
simulation of edge scattering from a beam halo collimator in the
FCC-ee are presented to demonstrate the capabilities of the tool.
