A Characterisation of the ATLAS ITk High Rapidity Modules in AllPix and EUTelescope

Ryan Justin Atkin

doi:10.1088/1742-6596/889/1/012017

Abstract

The upgrade of the LHC to the high luminosity LHC (HL-LHC) will result in far more collisions occurring per bunch crossing, in turn producing more particles per second. Consequently, the current detectors will need to be upgraded to accommodate the large increase in radiation and data acquisition as well as a need to improve the tracking efficiency for the high pile-up environment. One of the main upgrades to the ATLAS detector is the complete overhaul of the inner detector (ID) by replacing it with an all silicon Inner Tracker (ITk). A simulation of the ITk will be required for performance predictions as well as for testing sample sensors in testbeams. The current testbeam software of Allpix and EUTelescope are written completely using Cartesian definitions, however some of the geometries in the ITk have radial definitions. In particular, the R0 geometry of the strip end-cap is in need of a radial description. Presented is the work behind creating a radial geometry for the R0 module in Allpix (using Geant4 descriptions) and EUTelescope (using TGeo descriptions).

Highlights

With the discovery of the Higgs boson in 2012[1][2] at the Large Hadron Collider (LHC) and with new searches pushing the limits of the current LHC and its detectors, an upgrade of the LHC to the High Luminosity LHC (HL-LHC) has been planned
The focus will be on upgrading the current inner detector (ID) to the inner tracker (ITk) as well as the upgrade of the Trigger and Data AcQuisition systems (TDAQ)
The purpose of the ATLAS detector during the HL-LHC will be on precision Higgs measurements, Vector Boson Fusion (VBF) and Scattering (VBS), as well as searches for new physics

Summary

Introduction

With the discovery of the Higgs boson in 2012[1][2] at the Large Hadron Collider (LHC) and with new searches pushing the limits of the current LHC and its detectors, an upgrade of the LHC to the High Luminosity LHC (HL-LHC) has been planned. The Transition Radiation Tracker (TRT) will not be present in the ITk as this type of detector will become saturated in the high pile-up environment of the HL-LHC and make it incapable of precision tracking. The telescope comprises of Mimosa26 high granularity pixel detectors[9], as shown in Fig.

Results

Conclusion