Authors: Davide Costanzo. Contributions from Grant Gorfine.

Introduction

This package contains the factories for building the GeoModel Detector Description of the Pixel detector. It builds both the material geometry using the GeoModelKernel and the readout geometry using classes in InDetReadoutGeometry.

The creation of the geometry is initiated by the DetectorTool (PixelDetectorTool) which is called from GeoModelSvc. The DetectorTool calls the top level factory (PixelDetectorFactory) which starts the building process.

The version of geometry is controlled by the Detector Description tag which can be specified at various levels (ATLAS, InnerDetector or Pixel node).

See https://uimon.cern.ch/twiki/bin/view/Atlas/InDetGeometryVersions for current versions supported.

See the InDetDetDescrExample package for examples of how to load the geometry and access detector elements.

Class Overview

The package contains several helper factories which build the different components of the Pixel. Some of the other classes are described here:

PixelDetectorTool: Tool called by GeoModelSvc to start the building process
PixelDetectorFactory: Top level factory. It in turn calls the component factories.
GeoVPixelFactory: Base class for all component factories.
PixelGeometryManager: Base class for interfaces to primary numbers.
DBPixelGeoManager: Interface to primary numbers from the Detector Description Database.