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Detector Description |
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RequirementsThe requirements for the detector data model has been captured in the document "GAUDI Detector Data Model" by R. Chytracek (pdf, fm). Detector Geometry ModelThe detector geometry is described in some detail in the Gaudi Users Guide in the Detector Description chapter. Please refer to it to get an overview. The following documents are the reference documents for the different parts of the software.
XML Description (DDDB)The Detector structure, Geometry and Materials are described in XML files with the following DTD (see also DTD source files). To edit the detector description you can use a normal text editor to edit XML files or alternatively use the graphical XML editor developed to understand our Detector Description model. Please refer to the available XML editor documentation for details on how to access and use it. All the XML files for the current LHCb detector description are stored in an sqlite database (CondDB). Instructions on how to use this database are available here. Prior to the migration to the sqlite database, the Xml files were kept in CVS, in the package Det/XmlDDDB. You can check for overlapping volumes, correct material distributions etc. using one of the methods described in the Gauss FAQ. The list of current known overlaps can be found here The LHCb Geometry (see also simplified geometry)
Geometry Framework and AlignmentThe LHCb detector description framework has been extended to allow for detector misalignments, that is, detector positions which deviate from the ideal, or nominal, position. A Wiki page has been setup as a source of documentation. TutorialLarge sections of the Simulation Advanced Tutorial on 21-22 February 2012 were devoted to detector description. Older (not completely up to date) documentation includes a previous version of the tutorial, a recipe and a note on extending the detector element for sub-detector geometry information. Documents and Presentations2007Presentations
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