Results from the Commissioning of the ATLAS Pixel Detector with Cosmic data

TL;DR

This paper reports on the installation, commissioning, calibration, and initial cosmic data collection results of the ATLAS pixel detector, the innermost tracking component of the ATLAS experiment at CERN, highlighting its readiness and performance.

Contribution

It provides the first detailed account of the ATLAS pixel detector's installation, commissioning, calibration, and initial cosmic data results, demonstrating its operational status before LHC data taking.

Findings

Successful installation and commissioning of the pixel detector.

Calibration procedures established and tested.

Initial cosmic data collected and analyzed.

Abstract

The ATLAS pixel detector is the innermost detector of the ATLAS experiment at the Large Hadron Collider at CERN. With approximately 80 million readout channels, the ATLAS silicon pixel detector is a high-acceptance, high-resolution, low-noise tracking device. Providing the desired refinement in charged track pattern recognition capability in order to meet the stringent track reconstruction requirements, the pixel detector largely defines the ability of ATLAS to effectively resolve primary and secondary vertices and perform efficient flavor tagging essential for discovery of new physics. Being the last sub-system installed in ATLAS by July 2007, the pixel detector was successfully connected, commissioned, and tested in situ while meeting an extremely tight schedule, and was ready to take data upon the projected turn-on of the LHC. Since fall 2008, the pixel detector has been included in the combined ATLAS detector operation, collecting cosmic muon data. Details from the pixel detector installation and commissioning, as well as details on calibration procedures and the results obtained with collected cosmic data, are presented along with a summary of the detector status.