| 1 | $Id: README,v 1.5 2004/05/31 18:13:04 gum 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 | ExampleN06 |
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| 9 | ---------- |
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| 10 | |
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| 11 | This example presently illustrates the following basic concepts, and in |
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| 12 | particular (indicated with ***), how to use G4 for optical photon |
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| 13 | generation and transport. An extended example of what is possible |
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| 14 | in Geant4 with optical photons can be found at |
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| 15 | examples/extended/optical/LXe. |
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| 16 | |
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| 17 | main() |
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| 18 | ------ |
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| 19 | |
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| 20 | ==> define Random Number Engine and initial seed |
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| 21 | |
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| 22 | G4VUserPhysicsList |
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| 23 | ------------------ |
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| 24 | |
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| 25 | ==> define particles; including *** G4OpticalPhoton *** |
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| 26 | define processes; including *** G4Cerenkov *** |
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| 27 | *** G4Scintillation *** |
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| 28 | *** G4OpAbsorption *** |
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| 29 | *** G4OpRayleigh *** |
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| 30 | *** G4OpBoundaryProcess *** |
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| 31 | |
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| 32 | G4VUserDetectorConstruction |
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| 33 | --------------------------- |
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| 34 | |
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| 35 | ==> define material: Air and Water |
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| 36 | define simple G4box geometry |
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| 37 | *** add G4MaterialPropertiesTable to G4Material *** |
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| 38 | *** define G4LogicalSurface(s) *** |
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| 39 | *** define G4OpticalSurface *** |
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| 40 | *** add G4MaterialPropertiesTable to G4OpticalSurface *** |
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| 41 | |
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| 42 | G4VUserPrimaryGeneratorAction |
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| 43 | ----------------------------- |
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| 44 | |
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| 45 | ==> Use G4ParticleGun to shoot a charge particle into a Cerenkov radiator |
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| 46 | |
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| 47 | ==> A messenger command allows to define interactivly the polarization of an |
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| 48 | primary optical photon (see for instance optPhoton.mac) |
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| 49 | |
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| 50 | G4UserRunAction |
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| 51 | --------------- |
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| 52 | |
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| 53 | ==> define G4Timer (start/stop) |
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| 54 | set verbose levels |
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| 55 | |
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| 56 | G4UserStackingAction |
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| 57 | -------------------- |
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| 58 | |
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| 59 | ==> show how to count the number of secondary particles in an event |
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| 60 | |
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| 61 | Visualisation |
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| 62 | ------------- |
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| 63 | |
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| 64 | The Visualization Manager is set in the main(). |
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| 65 | The initialisation of the drawing is done via a set of /vis/ commands |
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| 66 | in the macro vis.mac. This macro is automatically read from |
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| 67 | the main in case of interactive running mode. |
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| 68 | |
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| 69 | The detector has a default view which is a longitudinal view of the tank. |
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| 70 | The tracks are drawn at the end of event, and erased at the end of run. |
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| 71 | |
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| 72 | How to start |
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| 73 | ------------ |
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| 74 | |
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| 75 | - compile and link to generate an executable |
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| 76 | % cd N06 |
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| 77 | % gmake |
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| 78 | |
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| 79 | - execute N06 in 'batch' mode from macro files |
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| 80 | % exampleN06 exampleN06.in |
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| 81 | |
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| 82 | - execute N06 in 'interactive mode' with visualization |
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| 83 | % exampleN06 |
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| 84 | .... |
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| 85 | Idle> type your commands. For instance: |
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| 86 | Idle> /control/execute optPhoton.mac |
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| 87 | .... |
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| 88 | Idle> exit |
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| 89 | |
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