Source code (CVS tag: @) - Administrative privileges

Description

This package contains the reconstruction code for the Laser Alignment System in the Tracker.

Public interface

AlignmentAlgorithmBW: alignment algorithm developed by Bruno Wittmer. Used to calculate the alignment parameters using the data from the Laser Alignment System.
BeamProfileFitter: fit a gaussian to the laser beam profiles.
LaserAlignmentAlgorithmNegTEC: interface to the alignment algorithm for TEC-.
LaserAlignmentAlgorithmPosTEC: interface to the alignment algorithm for TEC+.
LaserAlignmentAlgorithmTEC2TEC: interface to the alignment algorithm to align TIB, TOB and both TEC's relative to each other.
LaserAlignmentNegTEC: pass the reconstructed beam positions to the alignment algorithm for TEC-.
LaserAlignmentPosTEC: pass the reconstructed beam positions to the alignment algorithm for TEC+.
LaserAlignmentTEC2TEC: pass the reconstructed beam positions to the alignment algorithm for TIB, TOB and TEC alignment.
LaserBeamClusterizer: clusterize the laser signals.
LaserClusterizerAlgorithm: algorithm to clusterize the laser signals (based on the result of the beam profile fit).
LaserHitPairGeneratorFromLayerPair: search for hit pairs on consecutive layers (used by the seed finder).
LaserHitPairGenerator : create hit pairs (used by the seed finder).
LaserLayerPairs: create pairs of layers (used by the seed finder).
LASvec: vector algebra needed by AlignmentAlgorithmBW.
LASvec2D: vector and matrix algebra needed by AlignmentAlgorithmBW.
LayerWithHits : look for layers with hits (used by the seed finder).
Millepede: algorithm used for alignment.
OrderedLaserHitPair : ordered pair of laser hits (used by the seed finder).
OrderedLaserHitPairs : collection of OrderedLaserHitPairs (used by the seed finder).
SeedGeneratorForLaserBeams : seed finder; seeds are used to create reconstructed tracks out of the laser beams in the endcaps.
SeedLayerPairs : base class for LaserLayerPairs (used by the seed finder).

Modules

LaserAlignment : main reconstruction module of the Laser Alignment System.

LaserClusterizer: build clusters from the laser signals.

LaserSeedGenerator: create seeds for the track reconstruction of the laser beams.

Unit tests and examples

ExpectedCorrectionsCalculator: calculate the expected alignment corrections from the applied misalignment (you have to provide the applied misalignments in the configuration file!).
ReadLaserRecHit: analyzer for printing information about reconstructed hits from the laser beams.
RecoAnalyzer: small analyzer to fill some histograms with information about the reconstruction of the laser beams.

runP.cfg: run the reconstruction code of the Laser Alignment System, clusterize the beams, convert the clusters to RecHits, create seeds and do the track reconstruction of the laser beams.
iguana.cfg: configuration file to visualize lasertracks with IGUANA

Status and planned development

Almost completed; finish storage of alignment corrections in the DB, implement algorithm to automatically select the layer for which the intensity of the laser beam is currently optimized.

Last updated: @ Author: Maarten Thomas.