Track Based Alignment in CMS

TL;DR

This paper presents the track-based alignment strategy for CMS detectors, discussing algorithms and initial results from applying them to the tracker and muon systems during early data taking.

Contribution

It introduces the alignment procedures and algorithms used for CMS detectors, providing initial results and studies relevant for the 2008 data collection start.

Findings

Initial alignment results for CMS tracker

Alignment algorithms' performance evaluated

Studies on muon detector alignment with tracks

Abstract

The strategy for track based alignment of the CMS tracking and muon detectors is presented. After an overview over the used data samples, the general alignment strategy is presented, with a focus of the procedures envisaged at the start of data taking in 2008. The three currently used alignment algorithms are discussed and first results on their application to the CMS tracker are presented, as well as studies on the alignment of the Muon detector with tracks.