Pixel Detector Data Quality Monitoring In Cms

The silicon pixel detector in the Compact Muon Solenoid (CMS) at the Large Hadron Collider contains approximately 66 million channels, and will provide extremely high tracking resolution for the experiment. To ensure the data collected is valid, it must be monitored continuously at all levels of acquisition and reconstruction. The Pixel Data Quality Monitoring (DQM) process ensures that the detector, as well as the data acquisition and reconstruction chain, is functioning properly. The monitoring process is designed such that it can examine the pixel detector with high enough granularity that potential problems can be identified and isolated, while running efficiently enough that action can be taken before much data is compromised.