Commissioning of the ATLAS reconstruction software with first data

TL;DR

This paper describes the commissioning process of the ATLAS detector's reconstruction software using cosmic ray data and initial LHC beam events to prepare for first proton collisions.

Contribution

It details the integration and testing of the ATLAS reconstruction software with early data, ensuring readiness for collision data analysis.

Findings

Successful collection of cosmic ray data with various detector configurations

Effective commissioning of the reconstruction software with initial beam events

Readiness of the detector system for first proton collisions

Abstract

Looking towards first LHC collisions, the ATLAS detector is being commissioned using the physics data available: cosmic rays and data taken during the LHC single beam operations at 450 GeV. During the installation of the ATLAS detector in the cavern, cosmic rays were collected with the different parts of the detector that were available. Combined cosmic runs taken with the full installed detector with and without magnetic field as well as a few single beam events recently recorded are being used to commission the full system prior to the first proton collisions.