Abstract

The Data Quality Monitoring (DQM) of the Compact Muon Solenoid (CMS) silicon tracking detectors (Tracker) at the Large Hadron Collider (LHC) at CERN is a software based system designed to monitor the detector and reconstruction performance, to identify problems and to certify the collected data for physics analysis. It uses the framework provided by the central CMS DQM as well as tools developed especially for the CMS Tracker DQM. This paper describes aim, framework conditions, tools and work flows of the CMS Tracker DQM and shows examples of its successful use during the recent commissioning phase of the CMS experiment.

Highlights

  • THE Data Quality Monitoring (DQM) system of the Compact Muon Solenoid (CMS) silicon tracking detectors (Tracker) has the two main tasks to (a) monitor the detector and reconstruction performance in order to find problems and (b) to provide data certification as basis for data selection for physics analysis

  • This paper describes aim, framework conditions, tools and work flows of the CMS Tracker DQM and shows examples of its successful use during the recent commissioning phase of the CMS experiment

  • In the approach to these tasks, the CMS Tracker DQM has to take the specific design of the detector and the framework given by the central CMS DQM into account

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Summary

INTRODUCTION

THE Data Quality Monitoring (DQM) system of the Compact Muon Solenoid (CMS) silicon tracking detectors (Tracker) has the two main tasks to (a) monitor the detector and reconstruction performance in order to find problems and (b) to provide data certification as basis for data selection for physics analysis. On the one hand, monitoring and problem identification have to allow for immediate feedback during data taking (online), so that any problem can be analyzed and solved quickly in order to record as much good-quality data as possible. It requires a comprehensive view of the data with respect to its source in the detector and its evolution during processing. In the approach to these tasks, the CMS Tracker DQM has to take the specific design of the detector and the framework given by the central CMS DQM into account

THE CMS TRACKER
THE CMS DQM SYSTEM
CMS will record data at a rate of 100 Hz systems
CMS Tracker DQM Expert GUI
THE DATA CERTIFICATION WORK FLOW FOR THE CMS TRACKER
CONCLUSION
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