Gabriele Cosmo
128 lines
4.1 KiB
Plaintext
128 lines
4.1 KiB
Plaintext
$Id: README,v 1.16 2005/03/02 13:39:46 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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This example has been setup to test the low energy gamma processes.
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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 run01.mac
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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 (hbook, root, 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 http://aida.freehep.org).
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7a - PI
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A package including AIDA and extended interfaces also using Python is PI,
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available from: http://cern.ch/pi
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Once installed PI or PI-Lite in a specified local area $MYPY, it is required
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to add the installation path to $PATH, i.e. for example, for release 1.2.1 of
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PI:
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setenv PATH ${PATH}:$MYPI/1.2.1/app/releases/PI/PI_1_2_1/rh73_gcc32/bin
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CERN users can use the PATH to the LCG area on AFS.
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Before running the example the command should be issued:
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eval `aida-config --runtime csh`
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7b - OpenScientist
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OpenScientist is available at http://www.lal.in2p3.fr/OpenScientist
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In OpenScientist, the AIDA implementation is the Lab package.
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You have to "setup" this package before compiling (then with G4ANALYSIS_USE)
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and running your Geant4 application.
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On UNIX you setup, with a csh flavoured shell :
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csh> setenv CMTPATH <OpenScientist install path>
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csh> source <OpenScientist install path>/Lab/<version>/cmt/setup.csh
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On UNIX with a sh flavoured shell :
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sh> CMTPATH=<OpenScientist install path>;export CMTPATH
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sh> . <OpenScientist install path>/Lab/<version>/cmt/setup.sh
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On Windows :
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DOS> set CMTPATH=<OpenScientist install path>
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DOS> call <OpenScientist install path>/Lab/<version>/cmt/setup.bat
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You have to use the XML or root file formats ; producing hbook files is not
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supported by OpenScientist/Lab. But the three formats (hbook, AIDA-XML, root)
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are readable by the interactive applications ; the Lab onx interactive
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program or the OpenPAW program.
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With OpenPAW, someone can view the histograms with :
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OS> opaw
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opaw> h/file 1 run0.aida (or opaw> h/file 1 run1.root)
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opaw> zone 2 2
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opaw> h/plot 1
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opaw> h/plot 2
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opaw> h/plot 3
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