Gabriele Cosmo
85 lines
2.5 KiB
Plaintext
85 lines
2.5 KiB
Plaintext
$Id: README,v 1.21 2008/09/12 18:46:14 maire Exp $
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-------------------------------------------------------------------
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=========================================================
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Geant4 - an Object-Oriented Toolkit for Simulation in HEP
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=========================================================
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TestEm4
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-------
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Plot energy deposited by 9 MeV photon beam in an homogeneous medium.
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1- GEOMETRY DEFINITION
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It is a cylinder of 5 cm radius filled with C6F6.
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2- PHYSICS LIST
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The particle list contains only gamma, electron,positron.
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The physics list contains the 'standard' electromagnetic processes.
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3- AN EVENT : THE PRIMARY GENERATOR
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The primary kinematic is a single 9 MeV gamma randomly shooted at the
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middle of the cylinder.
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4- VISUALIZATION
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The Visualization Manager is set in the main().
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The initialisation of the drawing is done via the commands
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/vis/.. in the macro vis.mac. This macro is
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automatically read from the main in case of interactive running mode.
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The detector has a default view which is a transversal view of the
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cylinder.
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The tracks are drawn at the end of event, and erased at the end of run.
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Optionaly one can choose to draw all particles, only the charged one,
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or none. This command is defined in EventActionMessenger class.
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5- PHYSICS SURVEY
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The energy deposited in C6F6 is histogramed.
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6- HOW TO START ?
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- compile and link to generate an executable
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% cd examples/extended/electromagnetic/TestEm4
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% gmake
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- execute TestEm4 in 'batch' mode from macro files
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% TestEm4 TestEm4.in
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- execute TestEm4 in 'interactive mode' with visualization
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% TestEm4
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....
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Idle> type your commands
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....
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Idle> exit
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- visualize the histogram (paw)
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paw> h/file 1 testem4.hbook
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paw> option stat
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paw> option logy
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paw> h/pl 1
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7- USING HISTOGRAMS
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By default the histograms are not activated. To activate histograms
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the environment variable G4ANALYSIS_USE should be defined. For instance
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uncomment the flag G4ANALYSIS_USE in GNUmakefile.
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Before compilation of the example it is optimal to clean up old files:
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gmake histclean
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gmake
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It is possible to choose the format of the histogram file :
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hbook, root (default), XML
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comment/uncomment 1 line in the constructor of RunAction.
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To use histograms, at least one of the AIDA implementations should be
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available. See InstallAida.txt
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