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None Re: Elliptical Mirror reflects but kill photons 

Keywords: ellipsoid boolean solid mirror
Forum: Geometry
Re: None Elliptical Mirror reflects but kill photons (Whitney Armstrong)
Re: None Re: Elliptical Mirror reflects but kill photons (Vladimir Grichine)
Date: 22 Feb, 2007
From: Whitney Armstrong <whit@temple.edu>

The problem is not with the reflection coefficient because when I change solid used in constructing the logical volume to a spherical mirror, It works perfectly. BUT when I use my elliptical mirror, it does not work.

I construct the mirror it 2 steps:

First I make an elliptical shell by subtracting a smaller ellipsoid from a larger using G4SubtractionSolid. Secondly, I center the desired apex inside a box and use G4IntersectionSolid to pick out the part that is inside the box.

It appears to work, especially when you look at this picture http://astro.temple.edu/~whit/badmirror.jpg. However, note that the reflected photons (moving right) are stopped. They stop right where the box used in the intersection ends!!! This should not happen.

The box has no characteristics because it is used to create a boolean solid. The resulting solid is then used to define the optical characteristics (specifically using logicalskin surface), but clearly it is reflected properly.

Here you can see below that the photon is Stopped and Killed!! But notice that it travels more that 300mm in the z direction (the general direction of the photons, +z is going left in the picture above) before being killed, when the thickness of the mirror should only be 3mm !!!

Thank you for your help!!!!!! -Whitney Armstrong

Here is a piece of the verbose output:

...

Start Run processing.

*********************************************************************************************************
* G4Track Information:   Particle = opticalphoton,   Track ID = 5,   Parent ID = 0
*********************************************************************************************************

Step#      X         Y         Z        KineE    dEStep   StepLeng  TrakLeng    Volume     Process
    0      0 fm      0 fm     -5 m       3 eV      0 eV      0 fm      0 fm        World    initStep

 >>AlongStepDoIt (process by process):    Process Name = Transportation

    ++G4Step Information 
      Address of G4Track    : 0x8772030
      Step Length (mm)      : 2998.556851921076
      Energy Deposit (MeV)  : 0
      -----------------------------------------------------------------------
        StepPoint Information               PreStep            PostStep
      -----------------------------------------------------------------------
         Position - x (mm)   :                    0   21.89420522798889
         Position - y (mm)   :                    0  -47.01264829398711
         Position - z (mm)   :                -5000  -2001.891654912943
         Global Time (ns)    :                    0   10.00210903211273
         Local Time (ns)     :                    0   10.00210903211273
         Proper Time (ns)    :                    0                   0
         Momentum Direct - x : 0.0073015808301123260.007301580830112326
         Momentum Direct - y : -0.01567842486090189-0.01567842486090189
         Momentum Direct - z :    0.999850425769406   0.999850425769406
         Momentum - x (MeV/c): 2.190474249033698e-082.190474249033698e-08
         Momentum - y (MeV/c): -4.703527458270567e-08-4.703527458270567e-08
         Momentum - z (MeV/c): 2.999551277308218e-062.999551277308218e-06
         Total Energy (MeV)  :                3e-06               3e-06
         Kinetic Energy (MeV):                3e-06               3e-06
         Velocity (mm/ns)    :           299.792458          299.792458
         Volume Name         :                World               World
         Safety (mm)         :                    0                   0
         Polarization - x    :   0.9120045518313834  0.9120045518313834
         Polarization - y    :   0.4101800158398651  0.4101800158398651
         Polarization - Z    : -0.0002281325175841303-0.0002281325175841303
         Weight              :                    1                   1
         Step Status         :            Undefined          Geom Limit
         Process defined Step:            Undefined      Transportation
      -----------------------------------------------------------------------
          !Note! Safety of PostStep is only valid after all DoIt invocations.

    ++G4ParticleChange Information 
      -----------------------------------------------
        G4ParticleChange Information  
      -----------------------------------------------
        # of 2ndaries       :                    0
      -----------------------------------------------
        Energy Deposit (MeV):                    0
        Track Status        :                Alive
        True Path Length (mm) :                3e+03
        Stepping Control      :                    0
        Mass (GeV)   :                    0
        Charge (eplus)   :                    0
        Position - x (mm)   :                 21.9
        Position - y (mm)   :                  -47
        Position - z (mm)   :               -2e+03
        Time (ns)           :                   10
        Proper Time (ns)    :                    0
        Momentum Direct - x :               0.0073
        Momentum Direct - y :              -0.0157
        Momentum Direct - z :                    1
        Kinetic Energy (MeV):                3e-06
        Polarization - x    :                0.912
        Polarization - y    :                 0.41
        Polarization - z    :            -0.000228
        Track Weight      :                    0
        Touchable (pointer) :                    0

    ++List of secondaries generated (x,y,z,kE,t,PID):  No. of secodaries = 0

 >>AlongStepDoIt (after all invocations):
    ++List of invoked processes 
      1) Transportation

    ++G4Step Information 
      Address of G4Track    : 0x8772030
      Step Length (mm)      : 2998.556851921076
      Energy Deposit (MeV)  : 0
      -----------------------------------------------------------------------
        StepPoint Information               PreStep            PostStep
      -----------------------------------------------------------------------
         Position - x (mm)   :                    0   21.89420522798889
         Position - y (mm)   :                    0  -47.01264829398711
         Position - z (mm)   :                -5000  -2001.891654912943
         Global Time (ns)    :                    0   10.00210903211273
         Local Time (ns)     :                    0   10.00210903211273
         Proper Time (ns)    :                    0                   0
         Momentum Direct - x : 0.0073015808301123260.007301580830112326
         Momentum Direct - y : -0.01567842486090189-0.01567842486090189
         Momentum Direct - z :    0.999850425769406   0.999850425769406
         Momentum - x (MeV/c): 2.190474249033698e-082.190474249033698e-08
         Momentum - y (MeV/c): -4.703527458270567e-08-4.703527458270567e-08
         Momentum - z (MeV/c): 2.999551277308218e-062.999551277308218e-06
         Total Energy (MeV)  :                3e-06               3e-06
         Kinetic Energy (MeV):                3e-06               3e-06
         Velocity (mm/ns)    :           299.792458          299.792458
         Volume Name         :                World               World
         Safety (mm)         :                    0                   0
         Polarization - x    :   0.9120045518313834  0.9120045518313834
         Polarization - y    :   0.4101800158398651  0.4101800158398651
         Polarization - Z    : -0.0002281325175841303-0.0002281325175841303
         Weight              :                    1                   1
         Step Status         :            Undefined          Geom Limit
         Process defined Step:            Undefined      Transportation
      -----------------------------------------------------------------------

    ++List of secondaries generated (x,y,z,kE,t,PID):  No. of secodaries = 0

 >>PostStepDoIt (process by process):    Process Name = Transportation

    ++G4Step Information 
      Address of G4Track    : 0x8772030
      Step Length (mm)      : 2998.556851921076
      Energy Deposit (MeV)  : 0
      -----------------------------------------------------------------------
        StepPoint Information               PreStep            PostStep
      -----------------------------------------------------------------------
         Position - x (mm)   :                    0   21.89420522798889
         Position - y (mm)   :                    0  -47.01264829398711
         Position - z (mm)   :                -5000  -2001.891654912943
         Global Time (ns)    :                    0   10.00210903211273
         Local Time (ns)     :                    0   10.00210903211273
         Proper Time (ns)    :                    0                   0
         Momentum Direct - x : 0.0073015808301123260.007301580830112326
         Momentum Direct - y : -0.01567842486090189-0.01567842486090189
         Momentum Direct - z :    0.999850425769406   0.999850425769406
         Momentum - x (MeV/c): 2.190474249033698e-082.190474249033698e-08
         Momentum - y (MeV/c): -4.703527458270567e-08-4.703527458270567e-08
         Momentum - z (MeV/c): 2.999551277308218e-062.999551277308218e-06
         Total Energy (MeV)  :                3e-06               3e-06
         Kinetic Energy (MeV):                3e-06               3e-06
         Velocity (mm/ns)    :           299.792458          299.792458
         Volume Name         :                World         toroid phys
         Safety (mm)         :                    0                   0
         Polarization - x    :   0.9120045518313834  0.9120045518313834
         Polarization - y    :   0.4101800158398651  0.4101800158398651
         Polarization - Z    : -0.0002281325175841303-0.0002281325175841303
         Weight              :                    1                   1
         Step Status         :            Undefined          Geom Limit
         Process defined Step:            Undefined      Transportation
      -----------------------------------------------------------------------

    ++G4ParticleChange Information 
      -----------------------------------------------
        G4ParticleChange Information  
      -----------------------------------------------
        # of 2ndaries       :                    0
      -----------------------------------------------
        Energy Deposit (MeV):                    0
        Track Status        :                Alive
        True Path Length (mm) :                3e+03
        Stepping Control      :                    0
        Mass (GeV)   :                    0
        Charge (eplus)   :                    0
        Position - x (mm)   :                 21.9
        Position - y (mm)   :                  -47
        Position - z (mm)   :               -2e+03
        Time (ns)           :                   10
        Proper Time (ns)    :                    0
        Momentum Direct - x :               0.0073
        Momentum Direct - y :              -0.0157
        Momentum Direct - z :                    1
        Kinetic Energy (MeV):                3e-06
        Polarization - x    :                0.912
        Polarization - y    :                 0.41
        Polarization - z    :            -0.000228
        Track Weight      :                    0
        Touchable (pointer) :            0x84a7268

    ++List of secondaries generated (x,y,z,kE,t,PID):  No. of secodaries = 0
 Photon at Boundary! 
 Old Momentum Direction: (0.0073,-0.0157,1)
 Old Polarization:       (0.912,0.41,-0.000228)
 New Momentum Direction: (-0.0318,0.126,-0.991)
 New Polarization:       (-0.912,-0.409,-0.0228)
 *** SpikeReflection *** 

 >>PostStepDoIt (process by process):    Process Name = OpBoundary

    ++G4Step Information 
      Address of G4Track    : 0x8772030
      Step Length (mm)      : 2998.556851921076
      Energy Deposit (MeV)  : 0
      -----------------------------------------------------------------------
        StepPoint Information               PreStep            PostStep
      -----------------------------------------------------------------------
         Position - x (mm)   :                    0   21.89420522798889
         Position - y (mm)   :                    0  -47.01264829398711
         Position - z (mm)   :                -5000  -2001.891654912943
         Global Time (ns)    :                    0   10.00210903211273
         Local Time (ns)     :                    0   10.00210903211273
         Proper Time (ns)    :                    0                   0
         Momentum Direct - x : 0.007301580830112326-0.03183116237397916
         Momentum Direct - y : -0.01567842486090189   0.126482302929783
         Momentum Direct - z :    0.999850425769406 -0.9914580193570981
         Momentum - x (MeV/c): 2.190474249033698e-08-9.549348712193749e-08
         Momentum - y (MeV/c): -4.703527458270567e-083.794469087893491e-07
         Momentum - z (MeV/c): 2.999551277308218e-06-2.974374058071294e-06
         Total Energy (MeV)  :                3e-06               3e-06
         Kinetic Energy (MeV):                3e-06               3e-06
         Velocity (mm/ns)    :           299.792458          299.792458
         Volume Name         :                World         toroid phys
         Safety (mm)         :                    0                   0
         Polarization - x    :   0.9120045518313834 -0.9124575423441434
         Polarization - y    :   0.4101800158398651 -0.4085344000280527
         Polarization - Z    : -0.0002281325175841303-0.02282273894616306
         Weight              :                    1                   1
         Step Status         :            Undefined          Geom Limit
         Process defined Step:            Undefined      Transportation
      -----------------------------------------------------------------------

    ++G4ParticleChange Information 
      -----------------------------------------------
        G4ParticleChange Information  
      -----------------------------------------------
        # of 2ndaries       :                    0
      -----------------------------------------------
        Energy Deposit (MeV):                    0
        Track Status        :                Alive
        True Path Length (mm) :                3e+03
        Stepping Control      :                    0
        Mass (GeV)   :                    0
        Charge (eplus)   :                    0
        Position - x (mm)   :                 21.9
        Position - y (mm)   :                  -47
        Position - z (mm)   :               -2e+03
        Time (ns)           :                   10
        Proper Time (ns)    :                    0
        Momentum Direct - x :              -0.0318
        Momentum Direct - y :                0.126
        Momentum Direct - z :               -0.991
        Kinetic Energy (MeV):                3e-06
        Polarization - x    :               -0.912
        Polarization - y    :               -0.409
        Polarization - z    :              -0.0228
        Track Weight      :                    1

    ++List of secondaries generated (x,y,z,kE,t,PID):  No. of secodaries = 0

 **PostStepDoIt (after all invocations):
    ++List of invoked processes 
      1) Transportation
      2) OpBoundary

    ++G4Step Information 
      Address of G4Track    : 0x8772030
      Step Length (mm)      : 2998.556851921076
      Energy Deposit (MeV)  : 0
      -----------------------------------------------------------------------
        StepPoint Information               PreStep            PostStep
      -----------------------------------------------------------------------
         Position - x (mm)   :                    0   21.89420522798889
         Position - y (mm)   :                    0  -47.01264829398711
         Position - z (mm)   :                -5000  -2001.891654912943
         Global Time (ns)    :                    0   10.00210903211273
         Local Time (ns)     :                    0   10.00210903211273
         Proper Time (ns)    :                    0                   0
         Momentum Direct - x : 0.007301580830112326-0.03183116237397916
         Momentum Direct - y : -0.01567842486090189   0.126482302929783
         Momentum Direct - z :    0.999850425769406 -0.9914580193570981
         Momentum - x (MeV/c): 2.190474249033698e-08-9.549348712193749e-08
         Momentum - y (MeV/c): -4.703527458270567e-083.794469087893491e-07
         Momentum - z (MeV/c): 2.999551277308218e-06-2.974374058071294e-06
         Total Energy (MeV)  :                3e-06               3e-06
         Kinetic Energy (MeV):                3e-06               3e-06
         Velocity (mm/ns)    :           299.792458          299.792458
         Volume Name         :                World         toroid phys
         Safety (mm)         :                    0                   0
         Polarization - x    :   0.9120045518313834 -0.9124575423441434
         Polarization - y    :   0.4101800158398651 -0.4085344000280527
         Polarization - Z    : -0.0002281325175841303-0.02282273894616306
         Weight              :                    1                   1
         Step Status         :            Undefined          Geom Limit
         Process defined Step:            Undefined      Transportation
      -----------------------------------------------------------------------

    ++List of secondaries generated (x,y,z,kE,t,PID):  No. of secodaries = 0
      [Note]Secondaries from AlongStepDoIt included.

    ++G4Track Information 
      -----------------------------------------------
        G4Track Information  
      -----------------------------------------------
        Step number         :                    1
        Position - x (mm)   :                 21.9
        Position - y (mm)   :                  -47
        Position - z (mm)   :               -2e+03
        Global Time (ns)    :                   10
        Local Time (ns)     :                   10
        Momentum Direct - x :              -0.0318
        Momentum Direct - y :                0.126
        Momentum Direct - z :               -0.991
        Kinetic Energy (MeV):                3e-06
        Polarization - x    :               -0.912
        Polarization - y    :               -0.409
        Polarization - z    :              -0.0228
        Track Length        :                3e+03
        Track ID #          :                    5
        Parent Track ID #   :                    0
        Next Volume         :          toroid phys 
        Track Status        :                Alive
        Vertex - x (mm)     :                    0
        Vertex - y (mm)     :                    0
        Vertex - z (mm)     :               -5e+03
        Vertex - Px (MomDir):               0.0073
        Vertex - Py (MomDir):              -0.0157
        Vertex - Pz (MomDir):                    1
        Vertex - KineE (MeV):                3e-06
        Creator Process     :      Event Generator
      -----------------------------------------------

#Step#      X         Y         Z        KineE    dEStep   StepLeng  TrakLeng    Volume     Process
    1   2.19 cm   -4.7 cm     -2 m       3 eV      0 eV      3 m       3 m         World  Transportation

 >>AlongStepDoIt (process by process):    Process Name = Transportation

    ++G4Step Information 
      Address of G4Track    : 0x8772030
      Step Length (mm)      : 316.8145690028687
      Energy Deposit (MeV)  : 0
      -----------------------------------------------------------------------
        StepPoint Information               PreStep            PostStep
      -----------------------------------------------------------------------
         Position - x (mm)   :    21.89420522798889   11.80962923961635
         Position - y (mm)   :   -47.01264829398711   -6.94121200479761
         Position - z (mm)   :   -2001.891654912943               -2316
         Global Time (ns)    :    10.00210903211273   11.05888868266307
         Local Time (ns)     :    10.00210903211273   11.05888868266307
         Proper Time (ns)    :                    0                   0
         Momentum Direct - x : -0.03183116237397916-0.03183116237397916
         Momentum Direct - y :    0.126482302929783   0.126482302929783
         Momentum Direct - z :  -0.9914580193570981 -0.9914580193570981
         Momentum - x (MeV/c): -9.549348712193749e-08-9.549348712193749e-08
         Momentum - y (MeV/c): 3.794469087893491e-073.794469087893491e-07
         Momentum - z (MeV/c): -2.974374058071294e-06-2.974374058071294e-06
         Total Energy (MeV)  :                3e-06               3e-06
         Kinetic Energy (MeV):                3e-06               3e-06
         Velocity (mm/ns)    :           299.792458          299.792458
         Volume Name         :          toroid phys         toroid phys
         Safety (mm)         :                    0                   0
         Polarization - x    :  -0.9124575423441434 -0.9124575423441434
         Polarization - y    :  -0.4085344000280527 -0.4085344000280527
         Polarization - Z    : -0.02282273894616306-0.02282273894616306
         Weight              :                    1                   1
         Step Status         :           Geom Limit          Geom Limit
         Process defined Step:       Transportation      Transportation
      -----------------------------------------------------------------------
          !Note! Safety of PostStep is only valid after all DoIt invocations.

    ++G4ParticleChange Information 
      -----------------------------------------------
        G4ParticleChange Information  
      -----------------------------------------------
        # of 2ndaries       :                    0
      -----------------------------------------------
        Energy Deposit (MeV):                    0
        Track Status        :                Alive
        True Path Length (mm) :                  317
        Stepping Control      :                    0
        Mass (GeV)   :                    0
        Charge (eplus)   :                    0
        Position - x (mm)   :                 11.8
        Position - y (mm)   :                -6.94
        Position - z (mm)   :            -2.32e+03
        Time (ns)           :                 11.1
        Proper Time (ns)    :                    0
        Momentum Direct - x :              -0.0318
        Momentum Direct - y :                0.126
        Momentum Direct - z :               -0.991
        Kinetic Energy (MeV):                3e-06
        Polarization - x    :               -0.912
        Polarization - y    :               -0.409
        Polarization - z    :              -0.0228
        Track Weight      :                    0
        Touchable (pointer) :            0x84a7268

    ++List of secondaries generated (x,y,z,kE,t,PID):  No. of secodaries = 0

 >>AlongStepDoIt (after all invocations):
    ++List of invoked processes 
      1) Transportation

    ++G4Step Information 
      Address of G4Track    : 0x8772030
      Step Length (mm)      : 316.8145690028687
      Energy Deposit (MeV)  : 0
      -----------------------------------------------------------------------
        StepPoint Information               PreStep            PostStep
      -----------------------------------------------------------------------
         Position - x (mm)   :    21.89420522798889   11.80962923961635
         Position - y (mm)   :   -47.01264829398711   -6.94121200479761
         Position - z (mm)   :   -2001.891654912943               -2316
         Global Time (ns)    :    10.00210903211273   11.05888868266307
         Local Time (ns)     :    10.00210903211273   11.05888868266307
         Proper Time (ns)    :                    0                   0
         Momentum Direct - x : -0.03183116237397916-0.03183116237397916
         Momentum Direct - y :    0.126482302929783   0.126482302929783
         Momentum Direct - z :  -0.9914580193570981 -0.9914580193570981
         Momentum - x (MeV/c): -9.549348712193749e-08-9.549348712193749e-08
         Momentum - y (MeV/c): 3.794469087893491e-073.794469087893491e-07
         Momentum - z (MeV/c): -2.974374058071294e-06-2.974374058071294e-06
         Total Energy (MeV)  :                3e-06               3e-06
         Kinetic Energy (MeV):                3e-06               3e-06
         Velocity (mm/ns)    :           299.792458          299.792458
         Volume Name         :          toroid phys         toroid phys
         Safety (mm)         :                    0                   0
         Polarization - x    :  -0.9124575423441434 -0.9124575423441434
         Polarization - y    :  -0.4085344000280527 -0.4085344000280527
         Polarization - Z    : -0.02282273894616306-0.02282273894616306
         Weight              :                    1                   1
         Step Status         :           Geom Limit          Geom Limit
         Process defined Step:       Transportation      Transportation
      -----------------------------------------------------------------------

    ++List of secondaries generated (x,y,z,kE,t,PID):  No. of secodaries = 0

 >>PostStepDoIt (process by process):    Process Name = Transportation

    ++G4Step Information 
      Address of G4Track    : 0x8772030
      Step Length (mm)      : 316.8145690028687
      Energy Deposit (MeV)  : 0
      -----------------------------------------------------------------------
        StepPoint Information               PreStep            PostStep
      -----------------------------------------------------------------------
         Position - x (mm)   :    21.89420522798889   11.80962923961635
         Position - y (mm)   :   -47.01264829398711   -6.94121200479761
         Position - z (mm)   :   -2001.891654912943               -2316
         Global Time (ns)    :    10.00210903211273   11.05888868266307
         Local Time (ns)     :    10.00210903211273   11.05888868266307
         Proper Time (ns)    :                    0                   0
         Momentum Direct - x : -0.03183116237397916-0.03183116237397916
         Momentum Direct - y :    0.126482302929783   0.126482302929783
         Momentum Direct - z :  -0.9914580193570981 -0.9914580193570981
         Momentum - x (MeV/c): -9.549348712193749e-08-9.549348712193749e-08
         Momentum - y (MeV/c): 3.794469087893491e-073.794469087893491e-07
         Momentum - z (MeV/c): -2.974374058071294e-06-2.974374058071294e-06
         Total Energy (MeV)  :                3e-06               3e-06
         Kinetic Energy (MeV):                3e-06               3e-06
         Velocity (mm/ns)    :           299.792458          299.792458
         Volume Name         :          toroid phys               World
         Safety (mm)         :                    0                   0
         Polarization - x    :  -0.9124575423441434 -0.9124575423441434
         Polarization - y    :  -0.4085344000280527 -0.4085344000280527
         Polarization - Z    : -0.02282273894616306-0.02282273894616306
         Weight              :                    1                   1
         Step Status         :           Geom Limit          Geom Limit
         Process defined Step:       Transportation      Transportation
      -----------------------------------------------------------------------

    ++G4ParticleChange Information 
      -----------------------------------------------
        G4ParticleChange Information  
      -----------------------------------------------
        # of 2ndaries       :                    0
      -----------------------------------------------
        Energy Deposit (MeV):                    0
        Track Status        :                Alive
        True Path Length (mm) :                  317
        Stepping Control      :                    0
        Mass (GeV)   :                    0
        Charge (eplus)   :                    0
        Position - x (mm)   :                 11.8
        Position - y (mm)   :                -6.94
        Position - z (mm)   :            -2.32e+03
        Time (ns)           :                 11.1
        Proper Time (ns)    :                    0
        Momentum Direct - x :              -0.0318
        Momentum Direct - y :                0.126
        Momentum Direct - z :               -0.991
        Kinetic Energy (MeV):                3e-06
        Polarization - x    :               -0.912
        Polarization - y    :               -0.409
        Polarization - z    :              -0.0228
        Track Weight      :                    0
        Touchable (pointer) :            0x8770778

    ++List of secondaries generated (x,y,z,kE,t,PID):  No. of secodaries = 0

 >>PostStepDoIt (process by process):    Process Name = OpBoundary

    ++G4Step Information 
      Address of G4Track    : 0x8772030
      Step Length (mm)      : 316.8145690028687
      Energy Deposit (MeV)  : 0
      -----------------------------------------------------------------------
        StepPoint Information               PreStep            PostStep
      -----------------------------------------------------------------------
         Position - x (mm)   :    21.89420522798889   11.80962923961635
         Position - y (mm)   :   -47.01264829398711   -6.94121200479761
         Position - z (mm)   :   -2001.891654912943               -2316
         Global Time (ns)    :    10.00210903211273   11.05888868266307
         Local Time (ns)     :    10.00210903211273   11.05888868266307
         Proper Time (ns)    :                    0                   0
         Momentum Direct - x : -0.03183116237397916-0.03183116237397916
         Momentum Direct - y :    0.126482302929783   0.126482302929783
         Momentum Direct - z :  -0.9914580193570981 -0.9914580193570981
         Momentum - x (MeV/c): -9.549348712193749e-08-9.549348712193749e-08
         Momentum - y (MeV/c): 3.794469087893491e-073.794469087893491e-07
         Momentum - z (MeV/c): -2.974374058071294e-06-2.974374058071294e-06
         Total Energy (MeV)  :                3e-06               3e-06
         Kinetic Energy (MeV):                3e-06               3e-06
         Velocity (mm/ns)    :           299.792458          299.792458
         Volume Name         :          toroid phys               World
         Safety (mm)         :                    0                   0
         Polarization - x    :  -0.9124575423441434 -0.9124575423441434
         Polarization - y    :  -0.4085344000280527 -0.4085344000280527
         Polarization - Z    : -0.02282273894616306-0.02282273894616306
         Weight              :                    1                   1
         Step Status         :           Geom Limit          Geom Limit
         Process defined Step:       Transportation      Transportation
      -----------------------------------------------------------------------

    ++G4ParticleChange Information 
      -----------------------------------------------
        G4ParticleChange Information  
      -----------------------------------------------
        # of 2ndaries       :                    0
      -----------------------------------------------
        Energy Deposit (MeV):                    0
        Track Status        :          StopAndKill
        True Path Length (mm) :                  317
        Stepping Control      :                    0
        Mass (GeV)   :                    0
        Charge (eplus)   :                    0
        Position - x (mm)   :                 11.8
        Position - y (mm)   :                -6.94
        Position - z (mm)   :            -2.32e+03
        Time (ns)           :                 11.1
        Proper Time (ns)    :                    0
        Momentum Direct - x :              -0.0318
        Momentum Direct - y :                0.126
        Momentum Direct - z :               -0.991
        Kinetic Energy (MeV):                3e-06
        Polarization - x    :               -0.912
        Polarization - y    :               -0.409
        Polarization - z    :              -0.0228
        Track Weight      :                    1

    ++List of secondaries generated (x,y,z,kE,t,PID):  No. of secodaries = 0

 **PostStepDoIt (after all invocations):
    ++List of invoked processes 
      1) Transportation
      2) OpBoundary

    ++G4Step Information 
      Address of G4Track    : 0x8772030
      Step Length (mm)      : 316.8145690028687
      Energy Deposit (MeV)  : 0
      -----------------------------------------------------------------------
        StepPoint Information               PreStep            PostStep
      -----------------------------------------------------------------------
         Position - x (mm)   :    21.89420522798889   11.80962923961635
         Position - y (mm)   :   -47.01264829398711   -6.94121200479761
         Position - z (mm)   :   -2001.891654912943               -2316
         Global Time (ns)    :    10.00210903211273   11.05888868266307
         Local Time (ns)     :    10.00210903211273   11.05888868266307
         Proper Time (ns)    :                    0                   0
         Momentum Direct - x : -0.03183116237397916-0.03183116237397916
         Momentum Direct - y :    0.126482302929783   0.126482302929783
         Momentum Direct - z :  -0.9914580193570981 -0.9914580193570981
         Momentum - x (MeV/c): -9.549348712193749e-08-9.549348712193749e-08
         Momentum - y (MeV/c): 3.794469087893491e-073.794469087893491e-07
         Momentum - z (MeV/c): -2.974374058071294e-06-2.974374058071294e-06
         Total Energy (MeV)  :                3e-06               3e-06
         Kinetic Energy (MeV):                3e-06               3e-06
         Velocity (mm/ns)    :           299.792458          299.792458
         Volume Name         :          toroid phys               World
         Safety (mm)         :                    0                   0
         Polarization - x    :  -0.9124575423441434 -0.9124575423441434
         Polarization - y    :  -0.4085344000280527 -0.4085344000280527
         Polarization - Z    : -0.02282273894616306-0.02282273894616306
         Weight              :                    1                   1
         Step Status         :           Geom Limit          Geom Limit
         Process defined Step:       Transportation      Transportation
      -----------------------------------------------------------------------

    ++List of secondaries generated (x,y,z,kE,t,PID):  No. of secodaries = 0
      [Note]Secondaries from AlongStepDoIt included.

    ++G4Track Information 
      -----------------------------------------------
        G4Track Information  
      -----------------------------------------------
        Step number         :                    2
        Position - x (mm)   :                 11.8
        Position - y (mm)   :                -6.94
        Position - z (mm)   :            -2.32e+03
        Global Time (ns)    :                 11.1
        Local Time (ns)     :                 11.1
        Momentum Direct - x :              -0.0318
        Momentum Direct - y :                0.126
        Momentum Direct - z :               -0.991
        Kinetic Energy (MeV):                3e-06
        Polarization - x    :               -0.912
        Polarization - y    :               -0.409
        Polarization - z    :              -0.0228
        Track Length        :             3.32e+03
        Track ID #          :                    5
        Parent Track ID #   :                    0
        Next Volume         :                World 
        Track Status        :          StopAndKill
        Vertex - x (mm)     :                    0
        Vertex - y (mm)     :                    0
        Vertex - z (mm)     :               -5e+03
        Vertex - Px (MomDir):               0.0073
        Vertex - Py (MomDir):              -0.0157
        Vertex - Pz (MomDir):                    1
        Vertex - KineE (MeV):                3e-06
        Creator Process     :      Event Generator
      -----------------------------------------------

...

 

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