This is an example of a single barrel ECAL+HCAL tower. The HCAl is "sandwitch" calorimeter has abserber made of steel.
The tower consists of 40 layers. Each layer has absorber (steel) with the width of
1.8 cm. The two active media, positioned after the steel plate,
are polystyrene (for scintillation light) and quartz (for Cherenkov light).
These two layers are separated by the 0.1 cm of steel.
Each active media has a width of 0.5 cm.
The final part of this design is the steel plate of 0.1 cm width that protects the
quartz layer and forms the wall of the single layer.
This results in a 2 cm absorber and 1 cm active media for each of the 40 layers.
The interaction length of the 40 x (1.8+0.1+0.1 cm) steel absorbers is
4.77 lambda_I. When adding the active media, the total interaction length of the module is 5.77 lambda_I.
The transverse size of the module is 20 x 20 cm.
Check the ECAL geometry using this top-level file SimpleECAL.xml that includes "ECalBarrel_DualCrystal.xml":
geoDisplay DRSingleCrystal.xml Run this example using the script "A_RUN". It makes the ROOT file (using Sarah's example). To create ROOT files in "output" directory, run "A_RUN_ALL" script (takes very long!)
The main script that runs over data stired in "output" is:
A_RUN_RESOLUTIONIt runs "Resolution.C" which is the main analysis program that fills histograms and put them to "histo" directory.
This program is based on the SingleDualCrystal by Sarah Eno (eno@umd.edu).
source /cvmfs/sft.cern.ch/lcg/views/LCG_101/x86_64-centos7-gcc11-opt/setup.sh
git clone https://github.com/AIDASoft/DD4hep.git
cd DD4hep/examples
git clone git@github.com:chekanov/DualCrystalHcal.git
# edit CMakeLists.txt and add DualCrystalHcal to
# SET(DD4HEP _EXAMPLES "AlignDet CLICSiD ClientTests Conditions DDCMS DDCodex DDDigi DDG4 DDG4_MySensDet LHeD Optica\
lSurfaces Persistency DDCAD SimpleDetector DualCrystalHcal"
CACHE STRING "List of DD4hep Examples to build")
cd ..
mkdir build
mkdir install
cd build/
cmake -DDD4HEP_USE_GEANT4=ON -DBoost_NO_BOOST_CMAKE=ON -DDD4HEP_USE_LCIO=ON -DBUILD_TESTING=ON -DROOT_DIR=$ROOTSYS -D CMAKE_BUILD_TYPE=Release -DDD4HEP_BUILD_EXAMPLES=ON ..
make -j4
make install
cd ..
source bin/thisdd4hep.shS.Chekanov (ANL)