Warning, /geant4/examples/extended/hadronic/ParticleFluence/ConcentricSpheres/README is written in an unsupported language. File is not indexed.
0001 In this example, the particle fluence is evaluated for a set-up made
0002 of one target solid sphere, at the center of which a particle is shot
0003 (by default along the z-axis), followed by two outer, target solid sphere
0004 shells, with space in between filled up with G4_Galactic material - i.e.
0005 very low density gas.
0006 The three targets mimic a very simplified collider detector, with the
0007 first (inner) target as a proxy for a Tracker, the second (middle) target
0008 as a proxy for an electromagnetic (homogeneous) calorimeter, and the
0009 third and last (outer) target as a proxy for a hadronic (homogeneous)
0010 calorimeter.
0011
0012 The particle fluence is computed in six places: immediately outside
0013 each of the three targets (inner, middle and outer targets), and for
0014 each of them, in the "forward" and "backward" hemispheres (i.e. immediately
0015 after and before, respectively, of the target with respect to the direction
0016 of the primary particle).
0017
0018 The particle fluence is estimated by summing the track length in a
0019 "scoring volume" - i.e. a thin hemisphere shell filled up with G4_Galactic
0020 (very low density gas) material, immediately outside one of the targets -
0021 and then dividing for the cubic volume of such scoring volume.
0022
0023 Complementary information on average multiplicity, average kinetic energy,
0024 and average total energy flow (i.e. sum of kinetic energies) for the
0025 particles produced in the three targets are also computed.
0026
0027 The particle fluence is evaluated for the following 11 particle types:
0028 - all
0029 - electron + positron
0030 - gamma
0031 - muon- + muon+
0032 - neutrino (any flavour and including anti-neutrino)
0033 - charged pions
0034 - neutron + anti_neutron
0035 - proton + anti_proton
0036 - ion (and anti-ions)
0037 - otherMeson (e.g. kaons, etc.)
0038 - otherBaryon (e.g. hyperons, etc.)
0039
0040 The particle fluence is evaluated for the following 3 kinematical ranges:
0041 - any kinetic energy
0042 - kinetic energy < 20 MeV
0043 - kinetic energy > 20 MeV
0044
0045 Look for the string "***LOOKHERE***" for those parameters/options that
0046 are either hardwired in the code (i.e. not available via UI command),
0047 or default values of UI commands.
0048
0049 This example uses the physics list factory, therefore you can specify
0050 the reference physics list you want to use via the PHYSLIST
0051 environmental variable (by default, if you don't set it, the FTFP_BERT
0052 physics list is used).
0053
0054 To build this example:
0055
0056 mkdir Build; cd Build
0057 cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo \
0058 -DGeant4_DIR=/path-to-geant4-libraries ../.
0059 make
0060
0061 To run it:
0062
0063 ./ConcentricSpheres all_together.in
0064
0065 which shoots 50 GeV pion- on three different configurations
0066 (Scintillator-PbWO4-Copper, LiquidArgon-Lead-Iron, Silicon-Tungsten-Tungsten),
0067 with 100 events in each run, and print out some information on the
0068 particle fluence at the end of each run.
0069 Other macros exist for each of these specific configurations:
0070 lar_pb_fe.in, sci_pbwo4_cu.in, si_w_w.in .
