Simulation of Muon Background at the ILC

TL;DR

This paper presents a simulation study of muon background at the ILC, highlighting the need for magnetic devices to mitigate muon-induced noise in detectors.

Contribution

It provides the first detailed simulation of muon background at the ILC using MUCARLO and GEANT4, informing mitigation strategies.

Findings

Muon background can be significant in ILC detectors.

Magnetic devices are necessary to reduce muon-induced background.

Simulation results guide detector shielding design.

Abstract

Beginning with the first linear collider, SLC at SLAC, it was quickly discovered that high energy muons that are produced in halo collimators in the beam delivery system can cause a significant background in the experiment detector. Following publication of the ILC Technical Design Report, May 2013 [1] a simulation of this background has been made using simulation codes MUCARLO and GEANT4. It became clear that to mitigate this background, various magnetic devices were going to be needed.