Results from the commissioning of the ALICE Inner Tracking System with cosmics

TL;DR

This paper reports on the commissioning results of the ALICE Inner Tracking System using atmospheric muons, highlighting detector calibration, operation, and alignment methods essential for accurate tracking and vertexing.

Contribution

It introduces new calibration and alignment techniques for the ITS based on atmospheric muon data, improving detector performance understanding.

Findings

Successful detector operation and calibration with atmospheric muons

Development of new alignment methods for ITS detectors

Enhanced tracking and vertexing capabilities demonstrated

Abstract

The Inner Tracking System (ITS) is the detector of the ALICE central barrel located closest to the beam axis and it is therefore a key detector for tracking and vertexing performance. Here, the main results from the ITS commissioning with atmospheric muons in 2008 are presented, focusing in particular on the detector operation and calibration and on the methods developed for the alignment of the ITS detectors using reconstructed tracks.