Tracking detectors in high-energy physics experiments require an accurate determination of a large number of alignment parameters in order to allow a precise reconstruction of tracks and vertices. In addition to the initial optical survey, the use of tracks in a special software alignment is essential. The methods in use for the alignment of the ALICE Inner Tracking System are presented, starting from residual-based procedure to fitting systems with many thousands of parameters. The two methods are reviewed and the preliminary results showed.
Preparation for the alignment of the ALICE inner tracking system
MORETTO, SANDRA;LUNARDON, MARCELLO;
2011
Abstract
Tracking detectors in high-energy physics experiments require an accurate determination of a large number of alignment parameters in order to allow a precise reconstruction of tracks and vertices. In addition to the initial optical survey, the use of tracks in a special software alignment is essential. The methods in use for the alignment of the ALICE Inner Tracking System are presented, starting from residual-based procedure to fitting systems with many thousands of parameters. The two methods are reviewed and the preliminary results showed.
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