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1 In this example, the particle fluence is evaluated for simplified,
2 cylindrical hadronic calorimeters with axis along the z-direction,
3 and a beam particle shot before the calorimeter along its axis.
4
5 The particle fluence is computed in three places: "upstream", "downstream"
6 and "side", defined as the positions immediately after, before and aside,
7 respectively, of the calorimeter with respect to the direction of the
8 primary particle.
9
10 The particle fluence is estimated by summing the track length in a
11 "scoring volume" - i.e. a thin cylinder (for "upstream" and "downstream"
12 cases) or a thin hemisphere shell (for the "side" case) filled up with
13 G4_Galactic (very low density gas) material, immediately outside the
14 calorimeter - and then dividing for the cubic volume of such scoring volume.
15
16 Complementary information on average multiplicity, average kinetic energy,
17 and average total energy flow (i.e. sum of kinetic energies) for the
18 particles produced in the calorimeter are also computed.
19
20 The particle fluence is evaluated for the following 11 particle types:
21 - all
22 - electron + positron
23 - gamma
24 - muon- + muon+
25 - neutrino (any flavour and including anti-neutrino)
26 - charged pions
27 - neutron + anti_neutron
28 - proton + anti_proton
29 - ion (and anti-ions)
30 - otherMeson (e.g. kaons, etc.)
31 - otherBaryon (e.g. hyperons, etc.)
32
33 The particle fluence is evaluated for the following 3 kinematical ranges:
34 - any kinetic energy
35 - kinetic energy < 20 MeV
36 - kinetic energy > 20 MeV
37
38 Look for the string "***LOOKHERE***" for those parameters/options that
39 are either hardwired in the code (i.e. not available via UI command),
40 or default values of UI commands.
41
42 This example uses the physics list factory, therefore you can specify
43 the reference physics list you want to use via the PHYSLIST
44 environmental variable (by default, if you don't set it, the FTFP_BERT
45 physics list is used).
46
47 To build this example:
48
49 mkdir Build; cd Build
50 cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo \
51 -DGeant4_DIR=/path-to-geant4-libraries ../.
52 make
53
54 To run it:
55
56 ./Calo atlasHec.in
57
58 which shoots 50 GeV pion- on a simplified ATLAS HEC hadronic calorimeter,
59 in one run of 100 events, and print out some information on the particle
60 fluence at the end of the run.
61 Other macros exist for other types of simplified hadronic calorimeters:
62 atlasEcal.in, atlasFcal.in, atlasTileCal.in, cmsEcal.in, lhcbEcal.in .
