| 1 | $Id: README,v 1.19 2006/05/15 14:39:20 maire Exp $
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| 2 | -------------------------------------------------------------------
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| 3 |
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| 4 | =========================================================
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| 5 | Geant4 - an Object-Oriented Toolkit for Simulation in HEP
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| 6 | =========================================================
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| 7 |
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| 8 | TestEm4
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| 9 | -------
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| 10 |
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| 11 | Plot energy deposited by 9 MeV photon beam in an homogeneous medium.
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| 12 |
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| 13 | 1- GEOMETRY DEFINITION
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| 14 |
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| 15 | It is a cylinder of 5 cm radius filled with C6F6.
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| 16 |
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| 17 | 2- PHYSICS LIST
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| 18 |
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| 19 | The particle list contains only gamma, electron,positron.
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| 20 | The physics list contains the 'standard' electromagnetic processes.
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| 21 |
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| 22 | 3- AN EVENT : THE PRIMARY GENERATOR
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| 23 |
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| 24 | The primary kinematic is a single 9 MeV gamma randomly shooted at the
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| 25 | middle of the cylinder.
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| 26 |
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| 27 | 4- VISUALIZATION
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| 28 |
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| 29 | The Visualization Manager is set in the main().
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| 30 | The initialisation of the drawing is done via the commands
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| 31 | /vis/.. in the macro vis.mac. This macro is
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| 32 | automatically read from the main in case of interactive running mode.
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| 33 |
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| 34 | The detector has a default view which is a transversal view of the
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| 35 | cylinder.
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| 36 |
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| 37 | The tracks are drawn at the end of event, and erased at the end of run.
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| 38 | Optionaly one can choose to draw all particles, only the charged one,
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| 39 | or none. This command is defined in EventActionMessenger class.
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| 40 |
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| 41 | 5- PHYSICS SURVEY
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| 42 |
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| 43 | The energy deposited in C6F6 is histogramed.
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| 44 |
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| 45 | 6- HOW TO START ?
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| 46 |
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| 47 | - compile and link to generate an executable
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| 48 | % cd examples/extended/electromagnetic/TestEm4
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| 49 | % gmake
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| 50 |
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| 51 | - execute TestEm4 in 'batch' mode from macro files
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| 52 | % TestEm4 TestEm4.in
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| 53 |
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| 54 | - execute TestEm4 in 'interactive mode' with visualization
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| 55 | % TestEm4
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| 56 | ....
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| 57 | Idle> type your commands
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| 58 | ....
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| 59 | Idle> exit
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| 60 |
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| 61 | - visualize the histogram (paw)
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| 62 | paw> h/file 1 testem4.hbook
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| 63 | paw> option stat
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| 64 | paw> option logy
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| 65 | paw> h/pl 1
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| 66 |
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| 67 |
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| 68 | 7- USING HISTOGRAMS
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| 69 |
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| 70 | By default the histograms are not activated. To activate histograms
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| 71 | the environment variable G4ANALYSIS_USE should be defined. For instance
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| 72 | uncomment the flag G4ANALYSIS_USE in GNUmakefile.
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| 73 |
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| 74 | Before compilation of the example it is optimal to clean up old files:
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| 75 | gmake histclean
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| 76 | gmake
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| 77 |
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| 78 | It is possible to choose the format of the histogram file (hbook, root, XML):
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| 79 | comment/uncomment 1 line in the constructor of RunAction.
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| 80 |
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| 81 | To use histograms, at least one of the AIDA implementations should be
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| 82 | available (see http://aida.freehep.org).
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| 83 |
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| 84 | 7a - PI
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| 85 |
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| 86 | A package including AIDA and extended interfaces also using Python is PI,
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| 87 | available from: http://cern.ch/pi
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| 88 |
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| 89 | Once installed PI or PI-Lite in a specified local area $MYPY, it is required
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| 90 | to add the installation path to $PATH, i.e. for example, for release 1.2.1 of
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| 91 | PI:
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| 92 | setenv PATH ${PATH}:$MYPI/1.2.1/app/releases/PI/PI_1_2_1/rh73_gcc32/bin
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| 93 |
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| 94 | CERN users can use the PATH to the LCG area on AFS.
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| 95 | Before running the example the command should be issued:
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| 96 | eval `aida-config --runtime csh`
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| 97 |
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| 98 | 7b - OpenScientist
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| 99 |
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| 100 | OpenScientist is available at http://OpenScientist.lal.in2p3.fr.
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| 101 |
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| 102 | You have to "setup" the OpenScientist AIDA implementation before compiling
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| 103 | (then with G4ANALYSIS_USE set) and running your Geant4 application.
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| 104 |
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| 105 | On UNIX you setup, with a csh flavoured shell :
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| 106 | csh> source <<OpenScientist install path>/aida-setup.csh
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| 107 | or with a sh flavoured shell :
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| 108 | sh> . <<OpenScientist install path>/aida-setup.sh
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| 109 | On Windows :
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| 110 | DOS> call <<OpenScientist install path>/aida-setup.bat
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| 111 |
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| 112 | You can use various file formats for writing (AIDA-XML, hbook, root).
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| 113 | These formats are readable by the Lab onx interactive program
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| 114 | or the OpenPAW application. See the web pages.
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| 115 |
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| 116 |
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| 117 | With OpenPAW, on a run.hbook file, one can view the histograms
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| 118 | with something like :
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| 119 | OS> opaw
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| 120 | opaw> h/file 1 run.hbook ( or opaw> h/file 1 run.aida or run.root)
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| 121 | opaw> zone 2 2
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| 122 | opaw> h/plot 1
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| 123 | opaw> h/plot 2
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