Energy deposition studies in the LHCb insertion region from the validation to a step into the Hilumi challenge

TL;DR

This study uses detailed Monte Carlo simulations with FLUKA to evaluate radiation levels in the LHCb insertion region, validating predictions against measurements and preparing for future high-luminosity runs at the LHC.

Contribution

It presents a comprehensive IR8 model including the LHCb detector and benchmarks radiation predictions against measurements, aiding future luminosity upgrades.

Findings

Simulation predictions agree with Beam Loss Monitor measurements

Radiation levels are characterized for current and future LHCb runs

The model supports planning for higher luminosity scenarios

Abstract

The LHCb (Large Hadron Collider beauty) experiment at CERN aims at achieving a significantly higher luminosity than originally planned by means of two major upgrades: the Upgrade I that took place during the Long Shutdown 2 (LS2) and the Upgrade II foreseen for LS4. Such an increase in instantaneous and integrated luminosity with respect to the design values requires to reassess the radiation exposure of LHC magnets, cryogenics and electronic equipment placed in the Insertion Region 8 (IR8) around LHCb. Monte Carlo simulations are a powerful tool to understand and predict the interaction between particle showers and accelerator elements, especially in case of future scenarios. For this purpose, their validation through the comparison with available measurements is a relevant step. A detailed IR8 model, including the LHCb detector, has been implemented with the FLUKA code. The objective of this study is to evaluate radiation levels due to proton-proton collisions and benchmark the predicted dose values against Beam Loss Monitor (BLM) measurements performed in 2018. Finally, we comment on the upcoming LHC run (Run 3), featuring a first luminosity jump in LHCb.