ATLAS Upgrade for the HL-LHC: meeting the challenges of a five-fold increase in collision rate

TL;DR

The paper discusses the comprehensive upgrade plans for the ATLAS detector to handle a five-fold increase in collision rate at the HL-LHC, including new inner-tracker, calorimeter, muon systems, and trigger improvements.

Contribution

It presents the detailed design developments and status updates of the ATLAS detector upgrades tailored for the HL-LHC environment.

Findings

Designs for new inner-tracker are progressing rapidly.

Significant modifications are planned for calorimeter and muon systems.

Trigger system improvements are being developed to cope with higher data rates.

Abstract

With the LHC successfully collecting data at 7 TeV, plans are actively advancing for a series of upgrades leading eventually to about five times the LHC design-luminosity some 10-years from now in the High-Luminosity LHC (HL-LHC) project. Coping with the high instantaneous and integrated luminosity will require many changes to the ATLAS detector. The designs are developing rapidly for an all-new inner-tracker, significant changes in the calorimeter and muon systems, as well as improved triggers. This article summarizes the environment expected at the HL-LHC and the status of various improvements to the ATLAS detector.