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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