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0001 \page ExampleHepMCEx02 Example HepMCEx02
0002
0003 This example demonstrates how to interface primary particles in Geant4
0004 with various event generators via the HepMC Monte Carlo event interface.
0005 This is another example having the same generator action as
0006 [HepMCEx01](../../html_HepMCEx01/html/ExampleHepMCEx01.html),
0007 but much simpler user control.
0008
0009 ## Primary Generator
0010
0011 H02PrimaryGeneratorAction has HepMCG4Interface as the generator.
0012 There are two types of generators provided as samples. One generator reads
0013 primary information from a HepMC Ascii file (data/example_MyPythia.dat).
0014 The other one generates primaries directly invoking PYTHIA routines
0015 in every event.
0016
0017 ## Geometry
0018
0019 A simplified collider-type geometry, which consists of
0020 - endcap calorimeter (a set of tubes filled with lead),
0021 - barrel calorimeter (tube filled with lead),
0022 - barrel muon detector (8 sets of plates filled with Ar),
0023 - endcap muon detecror, (a set of tubes filled with Ar) and
0024 - uniform magnetic field along the z axis of 3 Tesla at the
0025 central region.
0026
0027 ## Physics List
0028
0029 FTFP_BERT predefined physics list
0030
0031 ## User actions
0032
0033 All particles except muons are killed in the calorimeter section.
0034
0035 ## Installation
0036
0037 See ["eventgenerator/HepMC" page](../../html/Examples_HepMC.html) how to build this example.
0038
0039 ## Execution
0040 ```
0041 % /HepMCEx02 hepmc_pygen.in
0042 ```
