Commissioning of the GEM-CSC Integrated Local Trigger for Run-3 of the CMS Experiment at the Large Hadron Collider
Abstract
The high luminosity upgrade to the Large Hadron Collider (LHC), means a significant increase in data, which the existing muon trigger system’s bandwidth is inadequate to process. The solution for enabling the muon system to handle this increase in data is the installation of thin Gas Electron Multiplier (GEM) detectors in front of the existing Cathode Strip Chambers (CSC), where the magnetic field is strong allowing for best measurement of the transverse momentum (p$_{\text{T}}$). By combining the data from the new GE1/1 system with the ME1/1, we can increase the p$_{\text{T}}$ resolution of the Level one (L1) trigger, allowing us to filter out many soft muons which otherwise would have been incorrectly reconstructed by the ME1/1 system alone, thus reducing the load on the higher level triggering system to catch these poor quality muons. In order to successfully implement this combined triggering system in time for the scheduled run-3, there must be an efficient means of commission the combined trigger system. This thesis describes the software and hardware developed to verify proper operation of this combined triggering system. This will vastly speed up the process of commissioning the combined Integrated Local Trigger (ILT), which will reduce the time wasted during installation, optimizing the amount of useful data collected by the CMS experiment.
Citation
Wetzel, Cameron K (2021). Commissioning of the GEM-CSC Integrated Local Trigger for Run-3 of the CMS Experiment at the Large Hadron Collider. Undergraduate Research Scholars Program. Available electronically from https : / /hdl .handle .net /1969 .1 /188475.