//$Id$

///\file "electromagnetic/TestEm17/.README.txt"
///\brief Example TestEm17 README page

/*! \page ExampleTestEm17 Example TestEm17

 This example is intended to check implementation of the processes 
 of muon interactions: ionization, direct (e+,e-) production,
 bremsstrahlung, mu-nuclear interaction.
 It allows to compute differential cross sections (as function of the
 energy transfered to secondaries), total cross sections and to compare
 with analytic calculations.
	
\section TestEm17_s1 GEOMETRY DEFINITION
 
 It is a single box of homogeneous medium.
 Two parameters define the geometry :
 - the material of the box,
 - the (full) size of the box.
 
 The default geometry (1 m of Iron) is constructed in 
 DetectorConstruction, but the above parameters can be changed 
 interactively via the commands defined in DetectorMessenger.
 	
\section TestEm17_s2 PHYSICS LIST
 
 The Physics List of the example uses the main local physics constructor
 (builder) which called "standard". In this builder a limited set 
 of physics processes are defined for muons, pions and proton:
 ionisation, bremsstrahlung and e+e- pair production. Energy range 
 for these processes is from 100*eV to 1000*PeV.

 Optionally "muNucl" builder, MuNuclearBuilder, may be added activating muon-nuclear 
 inelastic interaction.
	 	 
\section TestEm17_s3 AN EVENT : THE PRIMARY GENERATOR
 
  The primary kinematic consists of a single particle starting at the edge
  of the box. The type of the particle and its energy are set in 
  PrimaryGeneratorAction (mu+ 10 TeV), and can be changed via the G4 
  build-in commands of ParticleGun class (see the macros provided with 
  this example).
 	
\section TestEm17_s4 PHYSICS
 
  The incident particle is a muon. During the tracking, secondary
  particles are killed.

  The number of interactions are plotted as a function of the energy 
  transfered to the secondaries.
  The total number of interactions is recorded, and the total cross section
  computed from this.  

  At RunAction::EndOfRunAction(), the above results are compared with analytic calculations.
  The functions which compute the theoretical cross sections have been
  provided by the G4 MEPhI group, and grouped in MuCrossSections class.

\section TestEm17_s5 HISTOGRAMS
         
  The test contains 4 built-in 1D histograms, which are managed by the
  HistoManager class and its Messenger, HistoMessenger.

  - 1 Monte-Carlo relative transferred energy distribution histo
      (log10(eps/Emu kin) for knock-on electrons (ionization)
  - 2  ... direct (e+,e-) pair production
  - 3  ... bremsstrahlung
  - 4  ... nuclear interaction

  The histos can be activated individually with the command :
\verbatim
/testem/histo/setHisto id nbBins  valMin valMax 
\endverbatim
    min and max values of log10(eps/Emu kin).

  At RunAction::EndOfRunAction() the corresponding histos for analytic calculations are
  automatically created and filled (histo 11 to 14).
                                                    
  One can control the name and the type of the histograms file with 
  the command:
\verbatim
/testem/histo/setFileName  name  (default testem17)
\endverbatim
   
  It is possible to choose the format of the histogram file :
  root (default), xml, csv, by using namespace in HistoManager.hh
     	 				
\section TestEm17_s6- VISUALIZATION
 
  The Visualization Manager is set in the main () (see TestEm17.cc).
  The initialisation of the drawing is done via the commands
  /vis/... in the macro vis.mac. To get visualisation:
\verbatim
> /control/execute vis.mac
\endverbatim
 	
  The detector has a default view which is a longitudinal view of the 
  box.
 
  The tracks are drawn at the end of event, and erased at the end of run.
	
\section TestEm17_s7- HOW TO START ?
 
  - Execute TestEm17 in 'batch' mode from macro files :
\verbatim
% TestEm17   allproc.mac
\endverbatim
 		
  - Execute TestEm17 in 'interactive mode' with visualization :
\verbatim
% TestEm17
Idle> control/execute vis.mac
....
Idle> type your commands
....
Idle> exit
\endverbatim
  
*/
