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None simulation "stucked" with huge number of trasportations 

Forum: Event and Track Management
Date: 08 Jun, 2011
From: Simone <Simone>

hello,

i am having a weird problem with my simulation:

i am simulating neutrons impact on a 7 um Bi thick detector, everything works fine, but there are certain events in wich a huge number of tranportations occurs, and the simulation (and sometimes the entire pc) freezes

i think it's easier to understand looking at the verbose output; here below there is a selection, and attached there is the entire file:

>>> Event 157

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

Step#    X(mm)    Y(mm)    Z(mm) KinE(MeV)  dE(MeV) StepLeng TrackLeng  NextVolume ProcName
    0        0        0       50      14.3        0        0         0     expHall initStep
    1        0        0   0.0035      14.3        0       50        50        pxlX Transportation
    2        0        0  -0.0035      14.3        0    0.007        50     expHall Transportation
    3        0        0    -0.45      14.3        0    0.447      50.5       wafer Transportation
    4        0        0    -0.55      14.3        0      0.1      50.6     expHall Transportation
    5        0        0    -2.63      14.3        0     2.08      52.6     ACDpxlX Transportation
    6        0        0    -3.13      14.3        0      0.5      53.1     expHall Transportation
    7        0        0   -3e+04      14.3        0    3e+04     3e+04  OutOfWorld Transportation
>>> Event 158

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

Step#    X(mm)    Y(mm)    Z(mm) KinE(MeV)  dE(MeV) StepLeng TrackLeng  NextVolume ProcName
    0        0        0       50      24.5        0        0         0     expHall initStep
    1        0        0   0.0035      24.5        0       50        50        pxlX Transportation
    2        0        0   0.0034      24.5        0 0.000101        50        pxlX HadronElastic
    3 4.26e-26 -9.28e-26   0.0034      24.5        0    1e-09        50        pxlX Transportation
    4 8.52e-26 -1.86e-25   0.0034      24.5        0    1e-09        50        pxlX Transportation
    5 1.28e-25 -2.78e-25   0.0034      24.5        0    1e-09        50        pxlX Transportation
    6  1.7e-25 -3.71e-25   0.0034      24.5        0    1e-09        50        pxlX Transportation
    7 2.13e-25 -4.64e-25   0.0034      24.5        0    1e-09        50        pxlX Transportation
    8 2.56e-25 -5.57e-25   0.0034      24.5        0    1e-09        50        pxlX Transportation
    9 2.98e-25 -6.5e-25   0.0034      24.5        0    1e-09        50        pxlX Transportation
   10 3.41e-25 -7.43e-25   0.0034      24.5        0    1e-09        50        pxlX Transportation
   11 3.83e-25 -8.35e-25   0.0034      24.5        0    1e-09        50        pxlX Transportation
   12 4.26e-25 -9.28e-25   0.0034      24.5        0    1e-09        50        pxlX Transportation
   13 4.68e-25 -1.02e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   14 5.11e-25 -1.11e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   15 5.54e-25 -1.21e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   16 5.96e-25 -1.3e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   17 6.39e-25 -1.39e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   18 6.81e-25 -1.49e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   19 7.24e-25 -1.58e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   20 7.67e-25 -1.67e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   21 8.09e-25 -1.76e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   22 8.52e-25 -1.86e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   23 8.94e-25 -1.95e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   24 9.37e-25 -2.04e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   25 9.79e-25 -2.13e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   26 1.02e-24 -2.23e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   27 1.06e-24 -2.32e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   28 1.11e-24 -2.41e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   29 1.15e-24 -2.51e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   30 1.19e-24 -2.6e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   31 1.23e-24 -2.69e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   32 1.28e-24 -2.78e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   33 1.32e-24 -2.88e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   34 1.36e-24 -2.97e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   35 1.41e-24 -3.06e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   36 1.45e-24 -3.16e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   37 1.49e-24 -3.25e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   38 1.53e-24 -3.34e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation
   39 1.58e-24 -3.43e-24   0.0034      24.5        0    1e-09        50        pxlX Transportation

and so on...

any idea of what is causing the problem?

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2011/06/08/07.28-40894-out.txt

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