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Question Laboratory hit times 

Forum: Event and Track Management
Date: 29 May, 2010
From: Chibueze Zimuzo <Chibueze Zimuzo>

Hello,

I am interested to extract the "laboratory hit times" of particle interactions in GEANT4, but my simulation results suggest that GEANT4 assumes t = 0 at the begining of every event (see the result below), which is impractical considering the random particle emission nature. Please is there any way extracting or calculating (or even accounting for) the inter-event times as I would like classify the energy depositions in my calorimeter volumes with respect to the hit times.

Thanks for your time.

Chibueze.

Event: 988

*********************************************************************************************************
* G4Track Information:   Particle = gamma,   Track ID = 1,   Parent ID = 0
*********************************************************************************************************

Step#      X         Y         Z        KineE    dEStep    GloTime   StepLeng  TrakLeng    Volume     Process
    0      0 fm      0 fm     10 cm    511 keV     0 eV      0 ps      0 fm      0 fm        World    initStep
    1   2.99 cm  -2.26 cm      0 fm    511 keV     0 eV    356 ps   10.7 cm   10.7 cm        World  Transportation
    2      3 cm  -2.27 cm   -305 um    511 keV     0 eV    357 ps    326 um   10.7 cm    Scatterer  Transportation
    3   3.01 cm  -2.28 cm   -786 um    511 keV     0 eV    359 ps    513 um   10.8 cm    Scatterer  Transportation
    4   3.12 cm  -2.36 cm  -4.32 mm    511 keV     0 eV    372 ps   3.77 mm   11.1 cm    Scatterer  Transportation
    5   3.14 cm  -2.38 cm     -5 mm    511 keV     0 eV    374 ps    729 um   11.2 cm    Scatterer  Transportation
    6   4.64 cm  -3.51 cm   -5.5 cm    511 keV     0 eV    552 ps   5.34 cm   16.6 cm   Calor_Physical  Transportation
    7   4.75 cm  -3.59 cm  -5.88 cm    511 keV     0 eV    566 ps   4.08 mm     17 cm     Absorber  Transportation
    8   4.96 cm  -3.75 cm  -6.58 cm    511 keV     0 eV    591 ps   7.42 mm   17.7 cm     Absorber  Transportation
    9      5 cm  -3.78 cm  -6.72 cm    511 keV     0 eV    596 ps    1.5 mm   17.9 cm     Absorber  Transportation
   10   17.9 cm  -13.6 cm    -50 cm    511 keV     0 eV   2.14 ns   46.2 cm   64.1 cm   OutOfWorld  Transportation
Event: 989

*********************************************************************************************************
* G4Track Information:   Particle = gamma,   Track ID = 1,   Parent ID = 0
*********************************************************************************************************

Step#      X         Y         Z        KineE    dEStep    GloTime   StepLeng  TrakLeng    Volume     Process
    0      0 fm      0 fm     10 cm    511 keV     0 eV      0 ps      0 fm      0 fm        World    initStep
    1  -2.24 cm  -3.88 cm      0 fm    511 keV     0 eV    365 ps     11 cm     11 cm        World  Transportation
    2  -2.28 cm  -3.96 cm  -1.93 mm    511 keV     0 eV    373 ps   2.11 mm   11.2 cm    Scatterer  Transportation
    3  -2.28 cm  -3.96 cm  -2.04 mm    511 keV     0 eV    373 ps    127 um   11.2 cm    Scatterer  Transportation
    4  -2.35 cm  -4.07 cm     -5 mm    511 keV     0 eV    384 ps   3.24 mm   11.5 cm    Scatterer  Transportation
    5  -2.88 cm     -5 cm  -2.88 cm    511 keV     0 eV    471 ps   2.61 cm   14.1 cm   Calor_Physical  Transportation
    6  -13.4 cm  -23.3 cm    -50 cm    511 keV     0 eV   2.19 ns   51.6 cm   65.7 cm   OutOfWorld  Transportation
Event: 990

*********************************************************************************************************
* G4Track Information:   Particle = gamma,   Track ID = 1,   Parent ID = 0
*********************************************************************************************************

Step#      X         Y         Z        KineE    dEStep    GloTime   StepLeng  TrakLeng    Volume     Process
    0      0 fm      0 fm     10 cm    511 keV     0 eV      0 ps      0 fm      0 fm        World    initStep
    1   1.76 cm   1.24 mm 0.0142 fm    511 keV     0 eV    339 ps   10.2 cm   10.2 cm        World  Transportation
    2    1.8 cm   1.27 mm  -2.39 mm    511 keV     0 eV    347 ps   2.43 mm   10.4 cm    Scatterer  Transportation
    3   1.85 cm    1.3 mm     -5 mm    511 keV     0 eV    356 ps   2.65 mm   10.7 cm    Scatterer  Transportation
    4   2.72 cm   1.92 mm   -5.5 cm    511 keV     0 eV    525 ps   5.08 cm   15.7 cm   Calor_Physical  Transportation
    5   2.75 cm   1.94 mm  -5.64 cm    511 keV     0 eV    530 ps   1.46 mm   15.9 cm     Absorber  Transportation
    6   2.84 cm      2 mm  -6.18 cm    269 keV    17 eV    548 ps   5.44 mm   16.4 cm     Absorber  LowEnCompton
    :----- List of 2ndaries - #SpawnInStep=  1(Rest= 0,Along= 0,Post= 1), #SpawnTotal=  1 ---------------
    :   2.84 cm      2 mm  -6.18 cm    242 keV      548 ps         e-
    :----------------------------------------------------------------- EndOf2ndaries Info ---------------
    7   2.82 cm    437 um   -6.2 cm    151 keV  4.34 keV   553 ps    1.6 mm   16.6 cm     Absorber  LowEnCompton
    :----- List of 2ndaries - #SpawnInStep=  1(Rest= 0,Along= 0,Post= 1), #SpawnTotal=  2 ---------------
    :   2.82 cm    437 um   -6.2 cm    114 keV      553 ps         e-
    :----------------------------------------------------------------- EndOf2ndaries Info ---------------
    8   2.75 cm    126 um   -5.6 cm    151 keV     0 eV    574 ps   6.05 mm   17.2 cm     Absorber  Transportation
    9   2.74 cm   72.5 um   -5.5 cm    151 keV     0 eV    577 ps   1.04 mm   17.3 cm     Absorber  Transportation
   10   2.13 cm  -2.52 mm     -5 mm    151 keV     0 eV    745 ps   5.04 cm   22.3 cm   Calor_Physical  Transportation
   11   2.07 cm  -2.78 mm      0 fm    151 keV     0 eV    762 ps   5.04 mm   22.8 cm    Scatterer  Transportation
   12     -4 cm  -2.87 cm     50 cm    151 keV     0 eV   2.44 ns   50.4 cm   73.3 cm   OutOfWorld  Transportation

*********************************************************************************************************
* G4Track Information:   Particle = e-,   Track ID = 3,   Parent ID = 1
*********************************************************************************************************

Step#      X         Y         Z        KineE    dEStep    GloTime   StepLeng  TrakLeng    Volume     Process
    0   2.82 cm    437 um   -6.2 cm    114 keV     0 eV    553 ps      0 fm      0 fm     Absorber    initStep
    1   2.82 cm    432 um   -6.2 cm      0 eV    114 keV   553 ps   55.8 um   55.8 um     Absorber  LowEnergyIoni

*********************************************************************************************************
* G4Track Information:   Particle = e-,   Track ID = 2,   Parent ID = 1
*********************************************************************************************************

Step#      X         Y         Z        KineE    dEStep    GloTime   StepLeng  TrakLeng    Volume     Process
    0   2.84 cm      2 mm  -6.18 cm    242 keV     0 eV    548 ps      0 fm      0 fm     Absorber    initStep
    1   2.84 cm   2.01 mm  -6.18 cm      0 eV    242 keV   548 ps    184 um    184 um     Absorber  LowEnergyIoni

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