Glasgow SiD howto

The starting point is the sidloi3 model in lcgeo implemented by F. Gaede and based on the original sidloi3 compact file. This was tested by simulating single muons and reconstructing them (see lcgeo/example/run_sid_reco.xml).

Building the model

The model is using the generic detector drivers in DD4hep. For the calorimeters (Ecal/Hcal) the current (Oct 2015) CLIC drivers were used in order to have the DDRec extensions that will eventually be needed by DDMarlinPandora.

To compile, from the local lcgeo/ directory:

source /cvmfs/sft.cern.ch/lcg/external/gcc/4.8.1/x86_64-slc6-gcc48-opt/setup.sh
export PATH=/cvmfs/sft.cern.ch/lcg/external/Python/2.7.4/x86_64-slc6-gcc48-opt/bin/:$PATH
export LD_LIBRARY_PATH=/cvmfs/sft.cern.ch/lcg/external/Python/2.7.4/x86_64-slc6-gcc48-opt/lib/:$LD_LIBRARY_PATH
make -C build -j4 install

To check the geometry:

source ../config_dd4hep.sh
source ../dd4hep/bin/thisdd4hep.sh
source bin/thislcgeo.sh
geoDisplay SiD/compact/sidloi3/sidloi3_v00.xml

then from root prompt

root [1] gGeoManager->CheckOverlaps(0.01);
Info in <TGeoNodeMatrix::CheckOverlaps>: Checking overlaps for world_volume and daughters within 0.01
Check overlaps:      [==========]  129404 [100.00 %]           01
Info in <TGeoNodeMatrix::CheckOverlaps>: Number of illegal overlaps/extrusions : 6

Checking simulation+reconstruction chain

From lcgeo:

source /cvmfs/ilc.desy.de/sw/x86_64_gcc48_sl6/v01-17-07/Marlin/v01-06/build_env.sh
Marlin example/run_sid_reco.xml

Implementing custom SiD ECal drivers

The initial implementations uses GenericCalBarrel_o1_v01 and GenericCalEndcap_o1_v01 drivers. The generic drivers will build the main detection volumes but will not include detailed structural components and/or subcomponents (e.g. stacks, towers, gaps, support elements).

Development version is located in SiD/compact/SiD_o1_v01 in the DESY SVN repo. Naming convention for compact files is "DET_oX_vYY_ZZ.xml", e.g. EcalEndcap_o1_v01_00.xml. Use svn mv DET.xm DET_oX_vYY_ZZ.xml to rename compact files while preserving SVN history.

View with:

geoDisplay SiD/compact/SiD_o1_v01/SiD_o1_v01.xml

Test with ECals only (other subdetectors commented in SiD_o1_v01.xml):

root [0] gGeoManager->CheckOverlaps(0.01);
Info in <TGeoNodeMatrix::CheckOverlaps>: Checking overlaps for world_volume and daughters within 0.01
Check overlaps:      [==========] 3039 [100.00 %]           00:00
Info in <TGeoNodeMatrix::CheckOverlaps>: Number of illegal overlaps/extrusions : 0

This is work in progress - watch this wiki (and the SVN repo) for updates.