Neutron detector Geant4 code

(Magnetic field in shared mem, test on Debian)

How to use

1. Make sure Data.txt in directory has a correct path ifstream file("/home/alion/simulation/BMN/Ndet/shared_mem/Data.txt") in load_field.cc Then type in cmd
2. cd path_to_Ndet/Ndet/shared_mem
3. g++ -o get get_field.cc -lrt - script to extract data field from the field data array (test only, works only after ./load step 6)
4. g++ -o delete delete.cc -lrt - scrip to clear shared mem
5. g++ -o load load_field.cc -lrt - scrip to load magnetic field data to shared mem
6. ./load - at this step field data will be loaded to shared mem, will take some time (~ 10 minutes) 6 step field data is in your shared mem, if want to clear it, type ./delete

Now to Geant4 workspace

7. cd path_to_Ndet/Ndet/build, if no build directory - create it
8. source path_to_geant4_install_dir/bin/geant4.sh - export geant4 libraries
9. cmake -DGeant4_DIR=/path_to_geant4_install_dir path_to_Ndet/Ndet/
10. ./Ndet - run the simulation

At the moment there is 5 GeV proton beam that hit a liquid hydrogen target placed in the center of the field. Visulization file is created in the build directory after simulation end.

Change bool Interpolation = false; value to eather use interpolation or no (3x3x3 linear interpolation, computation time increses)