Authors: Grant Gorfine, Vakho Tsulaia, Joe Boudreau

Introduction

This package contains scripts to initialize the GeoModel Detector Description. For the migration to Configurables a new python module has been created. All clients of AtlasGeoModel package are requested to switch to the scripts in this python module. Old python scripts in the share directory have been declared obsolete.

General Usage Notes.

To initialize the geometry simply put in your joboptions:

 from AthenaCommon.GlobalFlags import globalflags
 globalflags.DetDescrVersion = "ATLAS-CSC-02-00-00"
 from AtlasGeoModel import SetGeometryVersion
 from AtlasGeoModel import GeoModelInit

There are other possibilities for the values of DetDescrVersion. See SetGeometryVersion.py in the python module of this package in order to see full list of values that the DetDescrVersion flag can have.

You can turn off detectors using DetFlags. For example

from AthenaCommon.DetFlags import DetFlags
# NB. Flags are off by default.
#DetFlags.detdescr.all_setOn()
DetFlags.detdescr.ID_setOn()
DetFlags.detdescr.Muon_setOff()
DetFlags.detdescr.LAr_setOff()
DetFlags.detdescr.Tile_setOff()

The scripts also look at GlobalFlags to determine if it is CTB or DC1 geometries which require special treatment. Normally these are already set if you are using ReExCommon or RecExTB. As long as these flags are set correctly the correct geometry should be loaded. If they are not already set you need to do:

For CTB

from AthenaCommon.GlobalFlags import GlobalFlags
GlobalFlags.DetGeo.set_ctbh8()

For DC1

from AthenaCommon.GlobalFlags import GlobalFlags
GlobalFlags.DetGeo.set_atlas()
GlobalFlags.DataSource.set_geant3()

Job Options

GeoModelInit.py: Initializes GeoModel. Loads GeoModelSvc.
SetGeometryVersion.py: Sets the appropriate Geometry tags based on the DetDescrVersion flag. In the future this will not be needed for reconstruction as the geometry version will be determined from the POOL file or CondDB.

The following job options are used by the above. Users do not need to call them directly. Users can turn off detectors using DetFlags.

GeoModelInitStandard.py: Standard initialization.
GeoModelInitDC1.py: Initialization for DC1.
GeoModelInitCTB.py: Initialization fro CTB.
GeoModelInitH6.py: Initialization of H6 TestBeam configurations
InDetGM.py: Inner Detector Det Descr.
MuonGM.py: Muon Det Descr
LArGM.py: LAr Det Descr
TileGM.py: Tile Det Descr
MiscGM.py: Other Det Descr. Contains beam pipe.
InDetGMCTB.py: Inner Detector CTB Descr.
TileGMCTB.py: Tile CTB Descr