Message: Same two steps repeat again and again Not Logged In (login)

Same two steps repeat again and again

Forum: Event and Track Management
Date: 31 Aug, 2009
From: Ioannis Sechopoulos <Ioannis Sechopoulos>

 A simulation I have been using for a long time now is giving me problems in that after a certain number of events (varies depending on the random number seed), it gets stuck performing the same two steps. The output of "/tracking/verbose 4" for these two steps is the following: #Step# X(mm) Y(mm) Z(mm) KinE(MeV) dE(MeV) StepLeng TrackLeng NextVolume ProcName 7 84.1 -182 44.4 0.016 0 4.64e-15 660 World Transportation >>AlongStepDoIt (process by process): Process Name = Transportation ++G4Step Information Address of G4Track : 0x19666c0 Step Length (mm) : 0 Energy Deposit (MeV) : 0 ----------------------------------------------------------------------- StepPoint Information PreStep PostStep ----------------------------------------------------------------------- Position - x (mm) : 84.08523386931844 84.08523386931844 Position - y (mm) : -181.75378512735 -181.75378512735 Position - z (mm) : 44.4354460094737 44.4354460094737 Global Time (ns) : 2.201048285186674 2.201048285186674 Local Time (ns) : 2.201048285186674 2.201048285186674 Proper Time (ns) : 0 0 Momentum Direct - x : 0.4601418205088121 0.4601418205088121 Momentum Direct - y : 0.7169432097626749 0.7169432097626749 Momentum Direct - z : 0.5237002377257712 0.5237002377257712 Momentum - x (MeV/c): 0.0073622691281409940.007362269128140994 Momentum - y (MeV/c): 0.0114710913562028 0.0114710913562028 Momentum - z (MeV/c): 0.00837920380361234 0.00837920380361234 Total Energy (MeV) : 0.016 0.016 Kinetic Energy (MeV): 0.016 0.016 Velocity (mm/ns) : 299.792458 299.792458 Volume Name : World World Safety (mm) : 5e-10 5e-10 Polarization - x : 0 0 Polarization - y : 0 0 Polarization - Z : 0 0 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 Non-ionizing Energy Deposit (MeV): 0 Track Status : Alive True Path Length (mm) : 0 Stepping Control : 0 Mass (GeV) : 0 Charge (eplus) : 0 MagneticMoment : 0 : = 0*[e hbar]/[2 m] Position - x (mm) : 84.1 Position - y (mm) : -182 Position - z (mm) : 44.4 Time (ns) : 2.2 Proper Time (ns) : 0 Momentum Direct - x : 0.46 Momentum Direct - y : 0.717 Momentum Direct - z : 0.524 Kinetic Energy (MeV): 0.016 Polarization - x : 0 Polarization - y : 0 Polarization - z : 0 Touchable (pointer) : 0xc8ac20 ++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 : 0x19666c0 Step Length (mm) : 0 Energy Deposit (MeV) : 0 ----------------------------------------------------------------------- StepPoint Information PreStep PostStep ----------------------------------------------------------------------- Position - x (mm) : 84.08523386931844 84.08523386931844 Position - y (mm) : -181.75378512735 -181.75378512735 Position - z (mm) : 44.4354460094737 44.4354460094737 Global Time (ns) : 2.201048285186674 2.201048285186674 Local Time (ns) : 2.201048285186674 2.201048285186674 Proper Time (ns) : 0 0 Momentum Direct - x : 0.4601418205088121 0.4601418205088121 Momentum Direct - y : 0.7169432097626749 0.7169432097626749 Momentum Direct - z : 0.5237002377257712 0.5237002377257712 Momentum - x (MeV/c): 0.0073622691281409940.007362269128140994 Momentum - y (MeV/c): 0.0114710913562028 0.0114710913562028 Momentum - z (MeV/c): 0.00837920380361234 0.00837920380361234 Total Energy (MeV) : 0.016 0.016 Kinetic Energy (MeV): 0.016 0.016 Velocity (mm/ns) : 299.792458 299.792458 Volume Name : World World Safety (mm) : 5e-10 5e-10 Polarization - x : 0 0 Polarization - y : 0 0 Polarization - Z : 0 0 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 : 0x19666c0 Step Length (mm) : 0 Energy Deposit (MeV) : 0 ----------------------------------------------------------------------- StepPoint Information PreStep PostStep ----------------------------------------------------------------------- Position - x (mm) : 84.08523386931844 84.08523386931844 Position - y (mm) : -181.75378512735 -181.75378512735 Position - z (mm) : 44.4354460094737 44.4354460094737 Global Time (ns) : 2.201048285186674 2.201048285186674 Local Time (ns) : 2.201048285186674 2.201048285186674 Proper Time (ns) : 0 0 Momentum Direct - x : 0.4601418205088121 0.4601418205088121 Momentum Direct - y : 0.7169432097626749 0.7169432097626749 Momentum Direct - z : 0.5237002377257712 0.5237002377257712 Momentum - x (MeV/c): 0.0073622691281409940.007362269128140994 Momentum - y (MeV/c): 0.0114710913562028 0.0114710913562028 Momentum - z (MeV/c): 0.00837920380361234 0.00837920380361234 Total Energy (MeV) : 0.016 0.016 Kinetic Energy (MeV): 0.016 0.016 Velocity (mm/ns) : 299.792458 299.792458 Volume Name : World physiSkin Safety (mm) : 5e-10 5e-10 Polarization - x : 0 0 Polarization - y : 0 0 Polarization - Z : 0 0 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 Non-ionizing Energy Deposit (MeV): 0 Track Status : Alive True Path Length (mm) : 0 Stepping Control : 0 Mass (GeV) : 0 Charge (eplus) : 0 MagneticMoment : 0 : = 0*[e hbar]/[2 m] Position - x (mm) : 84.1 Position - y (mm) : -182 Position - z (mm) : 44.4 Time (ns) : 2.2 Proper Time (ns) : 0 Momentum Direct - x : 0.46 Momentum Direct - y : 0.717 Momentum Direct - z : 0.524 Kinetic Energy (MeV): 0.016 Polarization - x : 0 Polarization - y : 0 Polarization - z : 0 Touchable (pointer) : 0xc8ab70 ++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) LowEnPhotoElec (Forced) ++G4Step Information Address of G4Track : 0x19666c0 Step Length (mm) : 0 Energy Deposit (MeV) : 0 ----------------------------------------------------------------------- StepPoint Information PreStep PostStep ----------------------------------------------------------------------- Position - x (mm) : 84.08523386931844 84.08523386931844 Position - y (mm) : -181.75378512735 -181.75378512735 Position - z (mm) : 44.4354460094737 44.4354460094737 Global Time (ns) : 2.201048285186674 2.201048285186674 Local Time (ns) : 2.201048285186674 2.201048285186674 Proper Time (ns) : 0 0 Momentum Direct - x : 0.4601418205088121 0.4601418205088121 Momentum Direct - y : 0.7169432097626749 0.7169432097626749 Momentum Direct - z : 0.5237002377257712 0.5237002377257712 Momentum - x (MeV/c): 0.0073622691281409940.007362269128140994 Momentum - y (MeV/c): 0.0114710913562028 0.0114710913562028 Momentum - z (MeV/c): 0.00837920380361234 0.00837920380361234 Total Energy (MeV) : 0.016 0.016 Kinetic Energy (MeV): 0.016 0.016 Velocity (mm/ns) : 299.792458 299.792458 Volume Name : World physiSkin Safety (mm) : 5e-10 5e-10 Polarization - x : 0 0 Polarization - y : 0 0 Polarization - Z : 0 0 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 : 8 Position - x (mm) : 84.1 Position - y (mm) : -182 Position - z (mm) : 44.4 Global Time (ns) : 2.2 Local Time (ns) : 2.2 Momentum Direct - x : 0.46 Momentum Direct - y : 0.717 Momentum Direct - z : 0.524 Kinetic Energy (MeV): 0.016 Polarization - x : 0 Polarization - y : 0 Polarization - z : 0 Track Length : 660 Track ID # : 1 Parent Track ID # : 0 Next Volume : physiSkin Track Status : Alive Vertex - x (mm) : 0 Vertex - y (mm) : -236 Vertex - z (mm) : 694 Vertex - Px (MomDir): 0.126 Vertex - Py (MomDir): 0.081 Vertex - Pz (MomDir): -0.989 Vertex - KineE (MeV): 0.016 Creator Process : Event Generator ----------------------------------------------- #Step# X(mm) Y(mm) Z(mm) KinE(MeV) dE(MeV) StepLeng TrackLeng NextVolume ProcName 8 84.1 -182 44.4 0.016 0 0 660 physiSkin Transportation >>AlongStepDoIt (process by process): Process Name = Transportation ++G4Step Information Address of G4Track : 0x19666c0 Step Length (mm) : 4.643365327944604e-15 Energy Deposit (MeV) : 0 ----------------------------------------------------------------------- StepPoint Information PreStep PostStep ----------------------------------------------------------------------- Position - x (mm) : 84.08523386931844 84.08523386931844 Position - y (mm) : -181.75378512735 -181.75378512735 Position - z (mm) : 44.4354460094737 44.4354460094737 Global Time (ns) : 2.201048285186674 2.201048285186674 Local Time (ns) : 2.201048285186674 2.201048285186674 Proper Time (ns) : 0 0 Momentum Direct - x : 0.4601418205088121 0.4601418205088121 Momentum Direct - y : 0.7169432097626749 0.7169432097626749 Momentum Direct - z : 0.5237002377257712 0.5237002377257712 Momentum - x (MeV/c): 0.0073622691281409940.007362269128140994 Momentum - y (MeV/c): 0.0114710913562028 0.0114710913562028 Momentum - z (MeV/c): 0.00837920380361234 0.00837920380361234 Total Energy (MeV) : 0.016 0.016 Kinetic Energy (MeV): 0.016 0.016 Velocity (mm/ns) : 299.792458 299.792458 Volume Name : physiSkin physiSkin Safety (mm) : 5e-10 5e-10 Polarization - x : 0 0 Polarization - y : 0 0 Polarization - Z : 0 0 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 Non-ionizing Energy Deposit (MeV): 0 Track Status : Alive True Path Length (mm) : 4.64e-15 Stepping Control : 0 Mass (GeV) : 0 Charge (eplus) : 0 MagneticMoment : 0 : = 0*[e hbar]/[2 m] Position - x (mm) : 84.1 Position - y (mm) : -182 Position - z (mm) : 44.4 Time (ns) : 2.2 Proper Time (ns) : 0 Momentum Direct - x : 0.46 Momentum Direct - y : 0.717 Momentum Direct - z : 0.524 Kinetic Energy (MeV): 0.016 Polarization - x : 0 Polarization - y : 0 Polarization - z : 0 Touchable (pointer) : 0xc8ab70 ++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 : 0x19666c0 Step Length (mm) : 4.643365327944604e-15 Energy Deposit (MeV) : 0 ----------------------------------------------------------------------- StepPoint Information PreStep PostStep ----------------------------------------------------------------------- Position - x (mm) : 84.08523386931844 84.08523386931844 Position - y (mm) : -181.75378512735 -181.75378512735 Position - z (mm) : 44.4354460094737 44.4354460094737 Global Time (ns) : 2.201048285186674 2.201048285186674 Local Time (ns) : 2.201048285186674 2.201048285186674 Proper Time (ns) : 0 0 Momentum Direct - x : 0.4601418205088121 0.4601418205088121 Momentum Direct - y : 0.7169432097626749 0.7169432097626749 Momentum Direct - z : 0.5237002377257712 0.5237002377257712 Momentum - x (MeV/c): 0.0073622691281409940.007362269128140994 Momentum - y (MeV/c): 0.0114710913562028 0.0114710913562028 Momentum - z (MeV/c): 0.00837920380361234 0.00837920380361234 Total Energy (MeV) : 0.016 0.016 Kinetic Energy (MeV): 0.016 0.016 Velocity (mm/ns) : 299.792458 299.792458 Volume Name : physiSkin physiSkin Safety (mm) : 5e-10 5e-10 Polarization - x : 0 0 Polarization - y : 0 0 Polarization - Z : 0 0 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 : 0x19666c0 Step Length (mm) : 4.643365327944604e-15 Energy Deposit (MeV) : 0 ----------------------------------------------------------------------- StepPoint Information PreStep PostStep ----------------------------------------------------------------------- Position - x (mm) : 84.08523386931844 84.08523386931844 Position - y (mm) : -181.75378512735 -181.75378512735 Position - z (mm) : 44.4354460094737 44.4354460094737 Global Time (ns) : 2.201048285186674 2.201048285186674 Local Time (ns) : 2.201048285186674 2.201048285186674 Proper Time (ns) : 0 0 Momentum Direct - x : 0.4601418205088121 0.4601418205088121 Momentum Direct - y : 0.7169432097626749 0.7169432097626749 Momentum Direct - z : 0.5237002377257712 0.5237002377257712 Momentum - x (MeV/c): 0.0073622691281409940.007362269128140994 Momentum - y (MeV/c): 0.0114710913562028 0.0114710913562028 Momentum - z (MeV/c): 0.00837920380361234 0.00837920380361234 Total Energy (MeV) : 0.016 0.016 Kinetic Energy (MeV): 0.016 0.016 Velocity (mm/ns) : 299.792458 299.792458 Volume Name : physiSkin World Safety (mm) : 5e-10 5e-10 Polarization - x : 0 0 Polarization - y : 0 0 Polarization - Z : 0 0 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 Non-ionizing Energy Deposit (MeV): 0 Track Status : Alive True Path Length (mm) : 4.64e-15 Stepping Control : 0 Mass (GeV) : 0 Charge (eplus) : 0 MagneticMoment : 0 : = 0*[e hbar]/[2 m] Position - x (mm) : 84.1 Position - y (mm) : -182 Position - z (mm) : 44.4 Time (ns) : 2.2 Proper Time (ns) : 0 Momentum Direct - x : 0.46 Momentum Direct - y : 0.717 Momentum Direct - z : 0.524 Kinetic Energy (MeV): 0.016 Polarization - x : 0 Polarization - y : 0 Polarization - z : 0 Touchable (pointer) : 0xc8ac20 ++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) LowEnPhotoElec (Forced) ++G4Step Information Address of G4Track : 0x19666c0 Step Length (mm) : 4.643365327944604e-15 Energy Deposit (MeV) : 0 ----------------------------------------------------------------------- StepPoint Information PreStep PostStep ----------------------------------------------------------------------- Position - x (mm) : 84.08523386931844 84.08523386931844 Position - y (mm) : -181.75378512735 -181.75378512735 Position - z (mm) : 44.4354460094737 44.4354460094737 Global Time (ns) : 2.201048285186674 2.201048285186674 Local Time (ns) : 2.201048285186674 2.201048285186674 Proper Time (ns) : 0 0 Momentum Direct - x : 0.4601418205088121 0.4601418205088121 Momentum Direct - y : 0.7169432097626749 0.7169432097626749 Momentum Direct - z : 0.5237002377257712 0.5237002377257712 Momentum - x (MeV/c): 0.0073622691281409940.007362269128140994 Momentum - y (MeV/c): 0.0114710913562028 0.0114710913562028 Momentum - z (MeV/c): 0.00837920380361234 0.00837920380361234 Total Energy (MeV) : 0.016 0.016 Kinetic Energy (MeV): 0.016 0.016 Velocity (mm/ns) : 299.792458 299.792458 Volume Name : physiSkin World Safety (mm) : 5e-10 5e-10 Polarization - x : 0 0 Polarization - y : 0 0 Polarization - Z : 0 0 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 : 9 Position - x (mm) : 84.1 Position - y (mm) : -182 Position - z (mm) : 44.4 Global Time (ns) : 2.2 Local Time (ns) : 2.2 Momentum Direct - x : 0.46 Momentum Direct - y : 0.717 Momentum Direct - z : 0.524 Kinetic Energy (MeV): 0.016 Polarization - x : 0 Polarization - y : 0 Polarization - z : 0 Track Length : 660 Track ID # : 1 Parent Track ID # : 0 Next Volume : World Track Status : Alive Vertex - x (mm) : 0 Vertex - y (mm) : -236 Vertex - z (mm) : 694 Vertex - Px (MomDir): 0.126 Vertex - Py (MomDir): 0.081 Vertex - Pz (MomDir): -0.989 Vertex - KineE (MeV): 0.016 Creator Process : Event Generator ----------------------------------------------- (sorry for the length of the output, but I don't know what might be an important part of the output). The next steps are repeats of these two, with everything exactly the same but the step numbers. To the best of my knowledge, there are no geometry overlaps (I checked with DAVID) and I have been using this simulation geometry for a long time. The only thing that changed recently is that I upgraded to the new patch 2 of 9.2. Can anybody give me an idea of what I could try to avoid/fix this or let me know if you need me to try anything different and provide the output here? Thanks! Ioannis

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1 Re: Same two steps repeat again and again   (Gabriele Cosmo - 01 Sep, 2009)
Re: Same two steps repeat again and again   (Ioannis Sechopoulos - 01 Sep, 2009)
Re: Same two steps repeat again and again   (Gabriele Cosmo - 01 Sep, 2009)
Re: Same two steps repeat again and again   (Ioannis Sechopoulos - 01 Sep, 2009)
Re: Same two steps repeat again and again   (Gabriele Cosmo - 02 Sep, 2009)
Re: Same two steps repeat again and again   (Robert Penny - 30 Sep, 2009)
Re: Same two steps repeat again and again   (Gabriele Cosmo - 30 Sep, 2009)
Re: Same two steps repeat again and again   (Ron Mathis - 02 Oct, 2009)
Re: Same two steps repeat again and again   (Gabriele Cosmo - 05 Oct, 2009)
 to: "Same two steps repeat again and again"
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