Alignment procedure of the LHCb Vertex Detector
Abstract
LHCb is one of the four main experiments of the Large Hadron Collider (LHC) project, which will start at CERN in 2008. The experiment is primarily dedicated to B-Physics and hence requires precise vertex reconstruction. The silicon vertex locator (VELO) has a single hit precision of better than 10 micron and is used both off-line and in the trigger. These requirements place strict constraints on its alignment. Additional challenges for the alignment arise from the detector being retracted between each fill of the LHC and from its unique circular disc r/phi strip geometry. This paper describes the track based software alignment procedure developed for the VELO. The procedure is primarily based on a non-iterative method using a matrix inversion technique. The procedure is demonstrated with simulated events to be fast, robust and to achieve a suitable alignment precision.
Cite
@article{arxiv.0807.5067,
title = {Alignment procedure of the LHCb Vertex Detector},
author = {S. Viret and C. Parkes and M. Gersabeck},
journal= {arXiv preprint arXiv:0807.5067},
year = {2008}
}
Comments
accepted for publication in NIMA