114 lines
4.3 KiB
Markdown
114 lines
4.3 KiB
Markdown
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This is based on code from Mirco Deckenhoff and modified by Blake Leverington, Peter Stromberger, _et al_.
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### Based on https://gitlab.cern.ch/lhcb-scifi/SciFiSimG4, but now expanded to a fibre mat, rather than a single fibre, with SiPM readout.
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## How to get SciFiSim running
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_Installation of GEANT4 help is at the bottom of this readme. Check the cmake options for compatibility._
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> $ git clone https://$USER@gitlab.cern.ch/lhcb-scifi/SciFiMatG4_v2
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> $ cd SciFiMatG4_v2
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Edit the environment script setup.sh to point to your Geant and ROOT installation and `source` it to add it to your environment:
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> $ source setup.sh //(required before running the software too if you open a new terminal.)
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Now to cun cmake in the build folder:
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> mkdir -p SciFiSim-build //it is safe to delete this folder if you have problems during compilation
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> cd SciFiSim-build
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> cmake ../SciFiSim
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> cmake --build . // or make clean; make
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To run the Geant4 simulation in batch mode:
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> cd ../SimulationData
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> ../SciFiSim-build/scifiSim muongun.mac
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To run the simulation from within the GUI (for visualization only) very slow if optical photon physics are enabled:
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> $ ../SciFiSim-build/scifiSim //opens the gui
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> /control/execute/ vis.mac
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## The Geometry file
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../SciFiSim/src/DetectorConstruction.cc&
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- a multi-layer ribbon of fibres with LHCb style SiPM array at the end (no 64ch gap)
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*if you make changes to the code, run `make` again in the build folder to recompile with the changes. Sometimes you might need `make clean; make`.*
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## Input Parameters
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Various parameters of the simulation are read in from a parameters file in /SimulationData/parameterFiles/ .
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The description is in SciFiSi
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## PhysicsList.cc
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The optical photon physics can be turned off by commenting out the OpticalPhyics section with `/* */` in /src/PhysicsList.cc
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if you are only interested in energy deposit in the fibres from the primary track, for example.
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## The root output
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There are 5 different TTrees created.
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- DetectedPhotons (information about photons detected at SiPM, each photon is an entry)
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- Trigger(information about trigger)
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- PrimaryParticleTrack
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- InitialParticle(Not sure what the difference is)
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- EnergyTrack (track length in fibres and energy deposited)
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## SciFiSimG4_v2 requires installation of Geant4 first
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> $ wget http://geant4.web.cern.ch/geant4/support/source/geant4.10.07.p01.tar.gz
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> $ tar -xzvf geant4.10.07.p01.tar.gz
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> $ mkdir geant4.10.07.p01-build
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> $ mkdir geant4.10.07.p01-install
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> $ cd geant4.10.07.p01-build/
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> https://geant4-userdoc.web.cern.ch/UsersGuides/InstallationGuide/html/gettingstarted.html#softwarerequirements
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> sudo apt-get install libxerces-c-dev qt4-dev-tools freeglut3-dev libmotif-dev tk-dev cmake libxpm-dev libxmu-dev libxi-dev
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> libqt5opengl5-dev
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>libqt4-dev
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>cmake libx11-dev xorg-dev libglu1-mesa-dev freeglut3-dev libglew1.5 libglew1.5-dev libglu1-mesa libglu1-mesa-dev libgl1-mesa-glx libgl1-mesa-dev
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>libfontconfig1-dev libfreetype6-dev libx11-dev libxcursor-dev libxext-dev libxfixes-dev libxft-dev libxi-dev libxrandr-dev libxrender-dev
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>libxmu-dev expat
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>freeglut3 freeglut3-dev mesa-utils
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### add your favourite options. the Granular libraries are required by the code, for some reason.
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> cmake -DCMAKE_INSTALL_PREFIX=/home/leverington/software/geant4.10.07.p01-install -DGEANT4_INSTALL_DATA=ON -DGEANT4_BUILD_MULTITHREADED=ON -DGEANT4_USE_OPENGL_X11=ON -DGEANT4_USE_QT=ON -DGEANT4_BUILD_CXXSTD=17 -DGEANT4_USE_FREETYPE=ON -DGEANT4_USE_SYSTEM_CLHEP_GRANULAR=ON ../geant4.10.07.p01
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> fix any missing software that is might complain is missing
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> $ make
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> $ make install
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## Cern ROOT must also be installed. Compiled with CXX17
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currently works with ROOT Version: 6.23/01
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> $ root-config --features
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> cxx17 asimage builtin_afterimage builtin_clang builtin_gl2ps builtin_llvm builtin_lz4 builtin_nlohmannjson builtin_openui5 builtin_tbb builtin_vdt builtin_xrootd builtin_xxhash builtin_zstd clad dataframe exceptions fftw3 fitsio gdml http imt mathmore mlp mysql opengl pyroot roofit webgui root7 runtime_cxxmodules shared ssl tmva tmva-cpu tmva-pymva spectrum vdt x11 xml xrootd
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> cmake -Dpython=ON -Droofit=ON -DCMAKE_INSTALL_PREFIX:PATH=/home/leverington/software/root-install-cxx17 -DCMAKE_CXX_STANDARD=17 ../root
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> make
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> make install
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