Warning, /geant4/examples/extended/hadronic/ParticleFluence/Layer/README is written in an unsupported language. File is not indexed.
0001 In this example, the particle fluence is evaluated for a simple set-up,
0002 consisting of one target solid cylinder, with axis along the z-direction,
0003 and a beam particle shot before the target along the axis of the target.
0004
0005 The particle fluence is computed in three places: "upstream", "downstream"
0006 and "side", defined as the positions immediately after, before and aside,
0007 respectively, of the target with respect to the direction of the primary
0008 particle.
0009
0010 The particle fluence is estimated by summing the track length in a
0011 "scoring volume" - i.e. a thin cylinder (for "upstream" and "downstream"
0012 cases) or a thin hemisphere shell (for the "side" case) filled up with
0013 G4_Galactic (very low density gas) material, immediately outside the
0014 target - and then dividing for the cubic volume of such scoring volume.
0015
0016 Complementary information on average multiplicity, average kinetic energy,
0017 and average total energy flow (i.e. sum of kinetic energies) for the
0018 particles produced in the target are also computed.
0019
0020 The particle fluence is evaluated for the following 11 particle types:
0021 - all
0022 - electron + positron
0023 - gamma
0024 - muon- + muon+
0025 - neutrino (any flavour and including anti-neutrino)
0026 - charged pions
0027 - neutron + anti_neutron
0028 - proton + anti_proton
0029 - ion (and anti-ions)
0030 - otherMeson (e.g. kaons, etc.)
0031 - otherBaryon (e.g. hyperons, etc.)
0032
0033 The particle fluence is evaluated for the following 3 kinematical ranges:
0034 - any kinetic energy
0035 - kinetic energy < 20 MeV
0036 - kinetic energy > 20 MeV
0037
0038 Look for the string "***LOOKHERE***" for those parameters/options that
0039 are either hardwired in the code (i.e. not available via UI command),
0040 or default values of UI commands.
0041
0042 This example uses the physics list factory, therefore you can specify
0043 the reference physics list you want to use via the PHYSLIST
0044 environmental variable (by default, if you don't set it, the FTFP_BERT
0045 physics list is used).
0046
0047 To build this example:
0048
0049 mkdir Build; cd Build
0050 cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo \
0051 -DGeant4_DIR=/path-to-geant4-libraries ../.
0052 make
0053
0054 To run it:
0055
0056 ./Layer all_together.in
0057
0058 which shoots 50 GeV pion- on different target materials, 100 events
0059 in each run, and print out some information on the particle fluence
0060 at the end of each run.
0061 Other macros exist for specific materials:
0062 cu.in, fe.in, graphite.in, lar.in, pb.in, pbwo4.in, polystyrene.in, si.in, w.in .
