//$Id$

///\file "field/field06/.README.txt"
///\brief Example field06 README page

/*! \page Examplefield06 Example field06

  This example exercises the capability of tracking massive
  particles in a gravity field.

  Credit goes to Erik Miller (Univ. of Northern British Columbia) and
  Garry Yan (Univ. of Toronto)

Classes Used

\section field06_s1 main()

 See field06.cc.

\section field06_s2 GEOMETRY DEFINITION

 As simple world G4Box with a G4UniformGravityField propagating momentum
 (G4EqGravityField) with G4ClassicalRK4(fEquation,8). The example uses the
 default gravity field on the earth's surface: gy = -9.81*m/s/s/c_light.

\section field06_s3 AN EVENT: THE PRIMARY GENERATOR

 Uses an Ultra Cold Neutron (UCN) and G4ParticleGun with: \n
 particleEnergy = G4UniformRand()*1e-7*eV

 UCN are launched from (0,0,0) uniform into 4pi

\section field06_s4 PHYSICS

 The simulation knows of only four particles: G4Neutron, G4Proton, 
 G4Electron and G4AntiNeutrinoE
\verbatim
 RegisterPhysics(new G4DecayPhysics());
 RegisterPhysics(new G4StepLimiterPhysics());

 G4VModularPhysicsList::ConstructProcess();
\endverbatim
 G4StepLimiterPhysics defines G4StepLimiter and G4UserSpecialCuts

\section field06_s5 User Action Classes

  F06EventAction::EndOfEventAction() - draws trajectories in G4TrajectoryContainer

\section field06_s6 HOW TO START ?

   This example handles the program arguments in a new way.
   It can be run with the following optional arguments:
\verbatim
   % OpNovice [-m macro ] [-u UIsession] [-t nThreads]
\endverbatim

   The -t option is available only in multi-threading mode
   and it allows the user to override the Geant4 default number of
   threads. The number of threads can be also set via G4FORCENUMBEROFTHREADS
   environment variable which has the top priority.

  - Execute field06 in 'batch' mode from macro files e.g.
\verbatim
% field06 -m field06.in > field06.out &
\endverbatim

  - Execute field06 in 'interactive' mode with visualization e.g.
\verbatim
% field06
....
Idle> type your commands, for example:
Idle> run/beamOn 1
....
\endverbatim

*/
