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Question a question on special cuts per region 

Forum: Event and Track Management
Date: 01 Nov, 2007
From: Victor_Makarov <Victor_Makarov>

Hello. This is my problem. My aim is to eliminate electrons', positrons', and gammas' creation in uran. For this purpose I created a region, assigned it to a logical volume of uran. My default production cuts (I used QGSP_BERT_HP list with 10 cm) are also used for my created region if I do not manually set special ones, right? Here's a printout where one can see that very high energy thresholds are used for uran. But further we can see that low energy gammas and electrons are still created in uran. Please, could somebody point at my mistake? Thanks in advance.

Region <DefaultRegionForTheWorld> -- appears in <VAC> world volume
 Root logical volume(s) : VAC 
 Pointers : G4VUserRegionInformation[00000000], G4UserLimits[00000000], G4FastSimulationManager[00000000], G4UserSteppingAction[00000000]
 Materials : Air 
 Production cuts :  gamma 10 cm     e- 10 cm     e+ 10 cm 

Region <Uregion> -- appears in <VAC> world volume
 Root logical volume(s) : Uran 
 Pointers : G4VUserRegionInformation[00000000], G4UserLimits[00000000], G4FastSimulationManager[00000000], G4UserSteppingAction[00000000]
 Materials : EU 
 Production cuts :  gamma 10 cm     e- 10 cm     e+ 10 cm 

========= Table of registered couples ==============================

Index : 0     used in the geometry : Yes     recalculation needed : No 
 Material : Air
 Range cuts        :  gamma 10 cm     e- 10 cm     e+ 10 cm 
 Energy thresholds :  gamma 1.19365 keV    e- 86.3701 keV    e+ 84.7899 keV
 Region(s) which use this couple : 
    DefaultRegionForTheWorld

Index : 1     used in the geometry : Yes     recalculation needed : No 
 Material : EU
 Range cuts        :  gamma 10 cm     e- 10 cm     e+ 10 cm 
 Energy thresholds :  gamma 2.88022e+295 J      e- 1.82628 GeV    e+ 1.73853 GeV
 Region(s) which use this couple : 
    Uregion

====================================================================

Start closing geometry. G4GeometryManager::ReportVoxelStats -- Voxel Statistics

    Total memory consumed for geometry optimisation:   0 kByte
    Total CPU time elapsed for geometry optimisation: 0 seconds

    Voxelisation: top CPU users:
    Percent   Total CPU    System CPU       Memory  Volume
    -------   ----------   ----------     --------  ----------
       0.00         0.00         0.00            0k VAC

    Voxelisation: top memory users:
    Percent     Memory      Heads    Nodes   Pointers    Total CPU    Volume
    -------   --------     ------   ------   --------   ----------    ----------
     100.00          0k         1        3          4         0.00    VAC
### Run 0 start.
*******************
*** AUTOSEED ON ***
*******************

--------- Ranecu engine status ---------
 Initial seed (index) = 0
 Current couple of seeds = 1193925577, 403480289
----------------------------------------
Start Run processing.

---> Begin of Event: 0

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

Step#      X         Y         Z        KineE    dEStep   StepLeng  TrakLeng    Volume     Process
    0      0 fm      0 fm  -49.9 m      14 MeV     0 eV      0 fm      0 fm         Uran    initStep
    1      0 fm      0 fm  -49.9 m       0 eV      0 eV   5.91 cm   5.91 cm         Uran  HadronFission
    :----- List of 2ndaries - #SpawnInStep=  2(Rest= 0,Along= 0,Post= 2), #SpawnTotal=  2 ---------------
    :      0 fm      0 fm  -49.9 m    20.2 MeV   neutron
    :      0 fm      0 fm  -49.9 m    1.73 MeV   neutron
    :----------------------------------------------------------------- EndOf2ndaries Info ---------------

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

Step#      X         Y         Z        KineE    dEStep   StepLeng  TrakLeng    Volume     Process
    0      0 fm      0 fm  -49.9 m    1.73 MeV     0 eV      0 fm      0 fm         Uran    initStep
    1   -174 um  -67.7 um  -49.9 m       0 eV      0 eV    348 um    348 um         Uran  NeutronInelastic
    :----- List of 2ndaries - #SpawnInStep=  3(Rest= 0,Along= 0,Post= 3), #SpawnTotal=  3 ---------------
    :   -174 um  -67.7 um  -49.9 m    1.68 MeV   neutron
    :   -174 um  -67.7 um  -49.9 m     7.2 keV U235[0.0]
    :   -174 um  -67.7 um  -49.9 m    51.6 keV     gamma
    :----------------------------------------------------------------- EndOf2ndaries Info ---------------

*********************************************************************************************************
* G4Track Information:   Particle = gamma,   Track ID = 6,   Parent ID = 3
*********************************************************************************************************

Step#      X         Y         Z        KineE    dEStep   StepLeng  TrakLeng    Volume     Process
    0   -174 um  -67.7 um  -49.9 m    51.6 keV     0 eV      0 fm      0 fm         Uran    initStep
    1   -240 um  -31.2 um  -49.9 m       0 eV   21.8 keV  95.6 um   95.6 um         Uran        phot
    :----- List of 2ndaries - #SpawnInStep=  1(Rest= 0,Along= 0,Post= 1), #SpawnTotal=  1 ---------------
    :   -240 um  -31.2 um  -49.9 m    29.9 keV        e-
    :----------------------------------------------------------------- EndOf2ndaries Info ---------------

*********************************************************************************************************
* G4Track Information:   Particle = e-,   Track ID = 7,   Parent ID = 6
*********************************************************************************************************

Step#      X         Y         Z        KineE    dEStep   StepLeng  TrakLeng    Volume     Process
    0   -240 um  -31.2 um  -49.9 m    29.9 keV     0 eV      0 fm      0 fm         Uran    initStep
    1   -240 um  -31.3 um  -49.9 m       0 eV   29.9 keV  2.42 um   2.42 um         Uran       eIoni

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1 None: RE: a question on special cuts per region   (Makoto Asai - 01 Nov, 2007)
1 None: RE: a question on special cuts per region   (Victor_Makarov - 01 Nov, 2007)
2 None: Re: a question on special cuts per region   (Vladimir IVANTCHENKO - 04 Nov, 2007)
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