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Geant4/examples/extended/hadronic/Hadr08/

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Name Size       Last modified (GMT) Description
Back Parent directory       2024-12-05 15:16:16
Folder include/       2024-12-05 15:16:16
Folder src/       2024-12-05 15:16:16
File CMakeLists.txt 2059 bytes       2024-12-05 15:16:16
File GNUmakefile 165 bytes       2024-12-05 15:16:16
C++ file Hadr08.cc 3434 bytes       2024-12-05 15:16:16
File History 2054 bytes       2024-12-05 15:16:16
File README 1744 bytes       2024-12-05 15:16:16
File hadr08.in 109 bytes       2024-12-05 15:16:16
File hadr08.out 41436 bytes       2024-12-05 15:16:16

  1 This is an example of how to use "generic biasing" to get the following
  2 functionality which is currently not available directly in the Geant4
  3 hadronic framework.
  4 
  5 We want to use the physics list FTFP_BERT everywhere in our detector,
  6 except that in one (or more) logical volume(s) we want to use a 
  7 different combination of hadronic models, e.g. FTFP + INCLXX 
  8 (instead of the default FTFP + BERT), for the final-state generation.
  9 
 10 Notice that we use the powerful "generic biasing" machinery available
 11 in Geant4, but the actual weights of all tracks remain to the usual
 12 value (1.0) as in the normal (unbiased) case.
 13 
 14 In this example, the detector is very simple: 
 15 -  a homogeneous block of silicon, as a proxy of a tracker sub-detector;
 16 -  followed by a crystal, as a proxy of an electromagnetic calorimeter;
 17 -  followed by a homogeneous block of iron, as a proxy of a hadron
 18    calorimeter.
 19 We assume that the block of silicon is where we want to replace FTFP+BERT
 20 with FTFP+INCLXX for the final-state modeling of proton, neutron, pion-
 21 and pion+-inelastic interactions (of any energy).
 22 This silicon layer is made artificially thick (20 cm) in order to have
 23 more hadron inelastic interactions for testing.
 24 
 25 This example has been tested only for G4 10.5.p01 and 10.6, but it should
 26 work also for previous recent releases (i.e. 10.4 and 10.3).
 27 The example works in both sequential and multi-threaded modes, and the
 28 CPU overhead due to "generic biasing" for this application seems to be
 29 very small (at the per-cent level).
 30 
 31 To build it:
 32   mkdir Build; cd Build
 33   cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo \
 34         -DGeant4_DIR=/path-to-geant4-libraries ../.
 35   make
 36 
 37 To run it:
 38   ./Hadr08 hadr08.in  
 39 which shoot 100 pion+ of 5 GeV kinetic energy.
 40