
///\file "hadronic/Hadr05/.README.txt"
///\brief Example Hadr05 README page

/*! \page ExampleHadr05 Example Hadr05

 How to collect energy deposition in a sampling calorimeter.
 How to survey energy flow.
 Hadr05 is the hadronic equivalent of TestEm3.


 \section Hadr05_s1 GEOMETRY DEFINITION
 
  The calorimeter is a box made of a given number of layers.
  A layer consists of a sequence of various absorbers (maximum MaxAbsor=9).
  The layer is replicated.
 
  Parameters defining the calorimeter :
    - the number of layers,
    - the number of absorbers within a layer,		
    - the material of the absorbers,
    - the thickness of the absorbers,
    - the transverse size of the calorimeter (the input face is a square). 
 
  In addition a transverse uniform magnetic field can be applied.
 
  The default geometry is constructed in DetectorConstruction class, but all
  of the above parameters can be modified interactively via the commands 
  defined in the DetectorMessenger class.

\verbatim
        |<----layer 0---------->|<----layer 1---------->|<----layer 2---------->|
        |           |           |                       |                       |
        ==========================================================================
        ||          |           ||          |           ||          |           ||
        ||          |           ||          |           ||          |           ||
        ||   abs 1  | abs 2     ||   abs 1  | abs 2     ||   abs 1  | abs 2     ||
        ||          |           ||          |           ||          |           ||
        ||          |           ||          |           ||          |           ||
 beam   ||          |           ||          |           ||          |           ||
======> ||          |           ||          |           ||          |           ||
        ||          |           ||          |           ||          |           ||
        ||          |           ||          |           ||          |           ||
        ||          |           ||          |           ||          |           ||
        ||          |           ||          |           ||          |           ||
        ||   cell 1 | cell 2    ||   cell 3 | cell 4    ||   cell 5 | cell 6    ||
        ==========================================================================
        ^           ^           ^           ^           ^           ^           ^
        pln1        pln2        pln3       pln4        pln5        pln6       pln7
\endverbatim
 
  NB. The number of absorbers and the number of layers can be set to 1.
  In this case we have a unique homogeneous block of matter, which looks like 
  a bubble chamber rather than a calorimeter ...
  (see the macro emtutor.mac)
  
  A function, and its associated UI command, allows to build a material
  directly from a single isotope.
  
  To be identified by the ThermalScattering module, the elements composing a
  material must have a specific name (see G4ParticleHPThermalScatteringNames.cc)
  Examples of such materials are build in Hadr06/src/DetectorConstruction.cc
    
 \section Hadr05_s2 PHYSICS LISTS
 
  "Full" set of physics processes are registered, but via PhysicsConstructor
  objects rather than complete pre-defined G4 physics lists. This alternative 
  way gives more freedom to register physics.
  
  Physics constructors are either constructors provided in Geant4 (with G4 prefix)
  or 'local'. They include : HadronElastic, HadronInelastic, IonsInelastic,
  GammaNuclear, RadioactiveDecay and Electomagnetic.
  (see geant4/source/physics_lists/constructors)

  HadronElasticPhysicsHP include a model for thermalized neutrons,
  under the control of the command /testhadr/phys/thermalScattering
 
  GammmaNuclearPhysics is a subset of G4BertiniElectroNuclearBuilder.

  ElectromagneticPhysics is a readable version of G4EmStandardPhysics_opt3.

  Several hadronic physics options are controlled by environment variables.
  To select them, see Hadr07.cc
    
 \section Hadr05_s3 AN EVENT : THE PRIMARY GENERATOR
 
  The primary kinematic consists of a single particle which hits the calorimeter
  perpendicular to the input face. The type of the particle and its energy are 
  set in the PrimaryGeneratorAction class, and can be changed via the 
  G4 build-in commands of G4ParticleGun class (see the macros provided with this 
  example).
 	
  In addition one can choose randomly the impact point of the incident particle.
  The corresponding interactive command is built in PrimaryGeneratorAction.
 	
  A RUN is a set of events.
  
  Hadr05 computes the energy deposited per absorber and the energy flow through
  the calorimeter.
 				
 \section Hadr05_s4 VISUALIZATION
 
  The Visualization Manager is set in the main() (see Hadr05.cc).
  The initialisation of the drawing is done via the commands :
  /vis/... in the macro vis.mac. In interactive session:
\verbatim  
  PreInit or Idle > /control/execute vis.mac
\endverbatim  
 	
  The default view is a longitudinal view of the calorimeter.
 	
 \section Hadr05_s5 PHYSICS DEMO
 
  The particle's type and the physics processes which will be available
  in this example are set in PhysicsList class.
 	
  In addition a built-in interactive command (/process/inactivate processName)
  allows to activate/inactivate the processes one by one.
  Then one can well visualize the processes one by one, especially 
  in the bubble chamber setup with a transverse magnetic field.
 
 \section Hadr05_s6 HOW TO START ?
 
  - Execute Hadr05 in 'batch' mode from macro files
\verbatim
% Hadr05   Cu-lAr.mac
\endverbatim
 
  - Execute Hadr05 in 'interactive mode' with visualization
\verbatim
% Hadr05
....
Idle> type your commands. For instance:
Idle> /control/execute vis.mac
....
Idle> exit
\endverbatim

  Macros provided in this example:
  - Fe-Sci.mac, Cu-lAr.mac, Pb-lAr.mac, W-lAr.mac : names are self explanatory
  - emtest.mac, emtutor.mac : to be run interactively
  - vis.mac: to activate visualization

\section Hadr05_s7 HISTOGRAMS
 
 Hadr05 can produce histograms :

\verbatim
  histo 1 : energy deposit in absorber 1
  histo 2 : energy deposit in absorber 2
  ...etc...........
    
  histo 11 : longitudinal profile of energy deposit in absorber 1 (MeV/event)
  histo 12 : longitudinal profile of energy deposit in absorber 2 (MeV/event)  
  ...etc...........  
  
  histo 21 : energy flow (MeV/event)
  histo 22 : lateral energy leak (MeV/event)  
      
  NB. Numbering scheme for histograms:
  layer     : from 1 to NbOfLayers (included)
  absorbers : from 1 to NbOfAbsor (included)
  planes    : from 1 to NbOfLayers*NbOfAbsor + 1 (included)
\endverbatim
  
 One can control the binning of the histo with the command:
\verbatim
/analysis/h1/set   idAbsor  nbin  Emin  Emax  unit 
\endverbatim
  etc.,  
  where unit is the desired energy unit for that histo (see Hadr05.in).
  
  One can control the name of the histograms file with the command:
\verbatim
/analysis/setFileName  name  (default hadr05)
\endverbatim
   
  It is possible to choose the format of the histogram file : root (default),
  xml, csv, by using namespace in HistoManager.hh 
 
 It is also possible to print selected histograms on an ascii file:
\verbatim
/analysis/h1/setAscii id
 \endverbatim
 All selected histos will be written on a file name.ascii  (default hadr05)

*/
  
