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Keywords: Transportation
Forum: Geometry
Re: None G4Transportation question (Victor)
Date: 14 Oct, 2004
From: michel maire <michel maire>

>> 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
>> > 

 The process indicated in the printout is the one responsible of the step limitation.
 It does mean that is applied alone. As Vladimir said, EnergyLoss and MultipleScattering are systematically applied
 at each step, whatever is the cause of the step limitation. 

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