Running GSIM CLAS simulation
From Hall A Wiki
Contents
- 1 GSIM Inventory
- 2 Running GSIM
- 2.1 Setting an Event Generator and create events file
- 2.2 Converting generated data files to GEANT-3 format input
- 2.3 Running generated events through a CLASS GEANT-3 simulation
- 2.4 running GSIM with the generated events
- 2.5 Preprocessing to add smearing of the data
- 2.6 Look at the output files
- 2.7 Converting the GSIM output file to root
- 2.8 Observing the output ROOT TTree
GSIM Inventory
- GSIM directory is to be located on the farm, at a large enough work disk. An example of the simulation inventory can be found at
/work/halla/e07006/disk1/Erez/GSIM (will be used for the remainder of the documentation as $GSIM)
Running GSIM
Setting an Event Generator and create events file
- PYTHIA is used as the base-line event generator (EG) for GSIM
- The existing EG is a fortran script located under $GSIM/Documents/ directory.
Setting Event Generator
- The EG should be modified for the specific solid target. An example for 12C can be found at
$GSIM/Documents/EventGenerator/src/qp1C.f
- To build the event generator use the build compilation command, e.g.
cd $GSIM/Documents/ build_EG_cs
(the result would be an executable event generator e.g. EventGenerator_exe/EG_C.exe)
Generate the Events
- Generate the events by executing the EG, e.g.
./EG_C.exe > test.dat
(the result would be a data file )
