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Forum: Geometry
Re: None G4Transportation question (Victor)
Date: 14 Oct, 2004
From: Vladimir IVANTCHENKO <vnivanch@mail.cern.ch>

Hi Victor,

Independently on which process limit the step there are AlongStep 
processes called after each step. If step of charged particle was 
in some media, then energy loss is not zero due to ionization.

VI

On Wed, 13 Oct 2004, Victor wrote:

> *** Discussion title: Geometry
> Email replies to PublicHyperNews@slac.stanford.edu must include:
>   In-Reply-To: <"/geometry/243"@geant4-hn.slac.stanford.edu>
>   Subject: ...change this to be about your reply.
> 
> Hi, 
> I've got a question from user about G4 transportation and energy 
> deposition (below). 
> 
> Could Geant4 experts have a look?
> 
> -Victor
> 
> ---------------------------------------------------------------------
> I'm back into simulations these days and I ran into a strange problem.
>  
> Is it true, that Transportation only defines the step but the energy
> deposit is always zero?
>  
> From this output of my simulation the energy deposit of transportation 
> is  far from zero...
> 
> It also happens for example4 but not for others!? I didn't find any  
> solution on the hypernews. 
> Any hints of what could be wrong?
>  
>  Thanks a lot for your help,
>                            Martina
>  
> > *********************************************************************************************************
> > * G4Track Information:   Particle = e-,   Track ID = 1,   Parent ID = 0
> > *********************************************************************************************************
> > 
> > Step#      X         Y         Z        KineE    dEStep   StepLeng  TrakLeng    Volume     Process
> >     0  -70.1 mum -43.8 mum   -20 cm     49 MeV     0 eV      0 fm      0 fm        World    initStep
> >     1   -427 mum  -284 mum  -9.8 cm     49 MeV  13.9 keV  10.2 cm   10.2 cm        World  LowEnergyIoni
> >     2   -424 mum  -279 mum  -7.7 cm     49 MeV  3.09 keV   2.1 cm   12.3 cm        World  LowEnergyIoni
> >     3   -729 mum   1.1 mm    7.1 cm     49 MeV  20.8 keV  14.8 cm   27.1 cm        World  LowEnergyIoni
> >     4   -481 mum  1.15 mm   13.7 cm   48.9 MeV  12.5 keV  6.59 cm   33.7 cm        World  LowEnergyIoni
> >     5   -694 mum  1.43 mm   22.7 cm   48.9 MeV  13.1 keV     9 cm   42.7 cm        World  LowEnergyIoni
> >     6   -799 mum  1.48 mm   25.8 cm   48.9 MeV  4.84 keV  3.12 cm   45.8 cm        World  LowEnergyIoni
> >     7   -858 mum   1.5 mm     27 cm   48.9 MeV  1.65 keV  1.22 cm     47 cm        World  LowEnergyIoni
> >     8  -1.01 mm   1.49 mm   30.2 cm   48.9 MeV  4.62 keV  3.19 cm   50.2 cm        World  LowEnergyIoni
> >     9  -1.28 mm   1.66 mm     36 cm   48.9 MeV  8.53 keV  5.81 cm     56 cm        World  LowEnergyIoni
> >    10  -1.29 mm   1.64 mm   36.8 cm   48.9 MeV  1.86 keV  7.78 mm   56.8 cm        World  LowEnergyIoni
> >    11  -1.42 mm    1.6 mm   38.9 cm   48.9 MeV  3.06 keV  2.11 cm   58.9 cm        World  LowEnergyIoni
> >    12  -2.83 mm   2.26 mm   53.1 cm   48.8 MeV  19.5 keV  14.2 cm   73.1 cm        World  LowEnergyIoni
> >    13  -3.86 mm    1.6 mm   69.2 cm   48.8 MeV  22.4 keV  16.1 cm   89.2 cm        World  LowEnergyIoni
> >    14  -3.87 mm    1.6 mm   69.3 cm   48.8 MeV   148 eV   1.67 mm   89.4 cm        World  Transportation
> >    15  -3.87 mm    1.6 mm   69.4 cm   48.6 MeV   171 keV   278 mum  89.4 cm     verfibry   LowEnBrem
> >    16  -3.88 mm   1.62 mm   69.7 cm   48.1 MeV   491 keV  2.72 mm   89.7 cm     verfibry  Transportation
> >    17  -4.12 mm   1.69 mm   70.8 cm   48.1 MeV  1.42 keV   1.2 cm   90.9 cm        World  Transportation
> >    18  -4.18 mm    1.7 mm   71.2 cm   47.4 MeV   676 keV     3 mm   91.2 cm     horfibry  Transportation
> >    19  -5.51 mm   1.33 mm   73.8 cm   47.4 MeV  3.38 keV   2.6 cm   93.8 cm        World  Transportation
> >    20  -5.76 mm   1.26 mm   74.2 cm   46.6 MeV   790 keV  5.01 mm   94.3 cm        palet  Transportation
> >    21  -6.85 mm    292 mum  77.3 cm   46.6 MeV  4.66 keV   3.1 cm   97.4 cm        World  LowEnergyIoni
> >    22  -1.33 cm  -5.38 mm   99.6 cm   46.6 MeV  30.3 keV  22.3 cm    1.2 m         World  LowEnergyIoni
> >    23   -1.5 cm  -6.56 mm   1.04 m    46.6 MeV  6.52 keV  4.68 cm   1.24 m         World  LowEnergyIoni
> >    24  -1.55 cm  -6.82 mm   1.06 m    46.6 MeV  1.07 keV  1.21 cm   1.26 m         World  LowEnergyIoni
> >    25  -1.66 cm  -7.35 mm   1.08 m    46.6 MeV  5.28 keV  2.96 cm   1.29 m         World  LowEnergyIoni
> >    26  -2.06 cm  -9.82 mm   1.19 m    46.6 MeV  14.9 keV  10.5 cm   1.39 m         World  Transportation
> >    27  -2.08 cm     -1 cm   1.19 m      33 MeV  1.19 MeV  2.72 mm   1.39 m          Calo   LowEnBrem
> >    28  -2.06 cm  -1.05 cm    1.2 m    26.2 MeV  1.81 MeV  4.08 mm    1.4 m          Calo  LowEnergyIoni
> >    29  -2.05 cm  -1.05 cm    1.2 m    24.3 MeV   598 keV  1.38 mm    1.4 m          Calo   LowEnBrem
> >    30  -2.04 cm  -1.02 cm    1.2 m    21.7 MeV  1.39 MeV   1.8 mm    1.4 m          Calo   LowEnBrem
> >    31  -2.03 cm  -9.96 mm    1.2 m    20.4 MeV   543 keV  1.39 mm    1.4 m          Calo   LowEnBrem
> >    32  -1.96 cm  -9.84 mm    1.2 m    16.1 MeV  1.13 MeV  2.75 mm    1.4 m          Calo   LowEnBrem
> >    33  -1.93 cm  -1.04 cm   1.21 m      13 MeV  1.78 MeV  4.35 mm   1.41 m          Calo   LowEnBrem
> >    34  -1.88 cm  -1.09 cm   1.21 m    9.85 MeV   2.2 MeV  4.77 mm   1.41 m          Calo  LowEnergyIoni
> >    35  -1.86 cm  -1.06 cm   1.21 m    5.71 MeV   213 keV   527 mum  1.41 m          Calo   LowEnBrem
> >    36  -1.68 cm  -9.02 mm   1.21 m    4.37 MeV  1.34 MeV  2.84 mm   1.42 m          Calo  LowEnergyIoni
> >    37  -1.56 cm  -8.19 mm   1.21 m    3.57 MeV   802 keV  2.24 mm   1.42 m          Calo  LowEnergyIoni
> >    38  -1.56 cm  -8.25 mm   1.21 m    2.67 MeV   898 keV  1.87 mm   1.42 m          Calo  LowEnergyIoni
> >    39  -1.67 cm  -8.36 mm   1.21 m    2.13 MeV   544 keV  1.46 mm   1.42 m          Calo  LowEnergyIoni
> >    40  -1.67 cm  -7.36 mm   1.21 m    1.69 MeV   435 keV  1.21 mm   1.42 m          Calo  LowEnergyIoni
> >    41  -1.73 cm  -6.88 mm   1.21 m    1.19 MeV   505 keV  1.01 mm   1.42 m          Calo  LowEnergyIoni
> >    42  -1.77 cm  -6.72 mm   1.21 m     836 keV   351 keV   772 mum  1.43 m          Calo  LowEnergyIoni
> >    43  -1.81 cm  -6.81 mm   1.21 m     586 keV   250 keV   605 mum  1.43 m          Calo  LowEnergyIoni
> >    44  -1.79 cm  -7.07 mm   1.21 m     266 keV   320 keV   481 mum  1.43 m          Calo  LowEnergyIoni
> >    45  -1.79 cm  -6.99 mm   1.21 m     127 keV   139 keV   281 mum  1.43 m          Calo  LowEnergyIoni
> >    46  -1.79 cm  -6.99 mm   1.21 m       0 eV    127 keV  97.8 mum  1.43 m          Calo  LowEnergyIoni
> 
> 

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