Web Based Monitoring in the CMS Experiment at CERN

TL;DR

The paper presents a Web Based Monitoring system for the CMS experiment at CERN, enabling real-time, flexible access to diverse detector and operational data to support efficient experiment management.

Contribution

It introduces a novel web-based system architecture that integrates heterogeneous data sources for real-time monitoring in a large-scale physics experiment.

Findings

System successfully used during the first LHC data run

Provides real-time access to diverse monitoring data

Enhances experiment operation efficiency

Abstract

The Compact Muon Solenoid (CMS) is a large and complex general purpose experiment at the CERN Large Hadron Collider (LHC), built and maintained by many collaborators from around the world. Efficient operation of the detector requires widespread and timely access to a broad range of monitoring and status information. To this end the Web Based Monitoring (WBM) system was developed to present data to users located anywhere from many underlying heterogeneous sources, from real time messaging systems to relational databases. This system provides the power to combine and correlate data in both graphical and tabular formats of interest to the experimenters, including data such as beam conditions, luminosity, trigger rates, detector conditions, and many others, allowing for flexibility on the user side. This paper describes the WBM system architecture and describes how the system was used during the first major data taking run of the LHC.