The CMS ECAL Trigger and DAQ system: electronics auto-recovery and monitoring

TL;DR

This paper discusses the CMS ECAL trigger and DAQ system's electronics auto-recovery and monitoring mechanisms, highlighting their role in maintaining stable data acquisition during high-luminosity LHC operations.

Contribution

It introduces a new electronics auto-recovery system for error detection and a monitoring tool called ecalView for error logging in the CMS ECAL.

Findings

Stable ECAL performance during high luminosity peaks

Effective error detection and auto-recovery system implemented

Comprehensive error monitoring with ecalView

Abstract

In 2017, the LHC (Large Hadron Collider) at CERN has obtained an astonishing result providing proton-proton collisions with an integrated luminosity of 50.25 fb-1. The CMS (Compact Muon Solenoid), a general-purpose detector operating at the LHC, has been able to record 45.39 fb-1. ECAL (Electromagnetic Calorimeter), has shown a good performance with a very stable DAQ (Data Acquisition) system even during higher LHC luminosity peaks. This has been partly because of the electronics auto-recovery system that has been developed to identify errors like SEU (Single Event Upset) and to resolve them. A new monitoring system has been developed called ecalView which is used for monitoring the errors from different electronics of the ECAL and to keep a log of these errors in a database for future reference.