Difference between revisions of "PbBi THickness GaussBeam"

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First simple test is to send 1 million, 10 MeV electrons towards a PbBi target and count how many positrons leave the downstream side
 +
 +
The Random number seed is set by Time in G4beamline to use a different set of pseudo random numbers each time it is run
 +
 +
The G4Beamlin incident electron beam has the following properties
 +
 +
<pre>
 +
beam gaussian particle=e- nEvents=1000000 beamZ=0.0
 +
        sigmaX=1.0 sigmaY=1.0 sigmaXp=0.100 sigmaYp=0.100
 +
        meanMomentum=10.0 sigmaP=4.0 meanT=0.0 sigmaT=0.0
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</pre>
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 +
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{| border="1"
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{| border="1"
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| PbBi Thickness (mm) || #positrons/million electrons (G4Beamline)|| #positrons/million electrons (MCNPX)
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|-
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-
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| 1    || 960,874, 916,934,897=916 +/- 33 || 1091
 +
|-
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| 1.5    || 1508 || 1728
 +
|-
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| 2    || 1963,1919,1880,1877,1970 = 1902 <math>\pm</math> 43 || 1984
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|-
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| 2.5    || 1997 || 2062
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|-
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| 3|| 2233,2250, 2251,2226 , 2222=2236 <math>\pm</math> 13|| 1986
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|-
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| 3.5|| 2193 || 1938
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|-
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| 4|| 2184,2156,2089,2173,2181=2157 <math>\pm</math> 39 || 1858
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|-
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| 5|| 2042 || 1646
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|-
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| 6|| 1851, 1932, 1857, 1896,1924 = 1892<math> \pm</math> 37 || 1541
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|-
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| 10|| 1480,1488 || 1216
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|-
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|}
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Comparison of G4Beamline and MCNPX
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[[File:Comparison.png | 200 px]]
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Energy Distribution
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 +
[[File:TF_PosE_04-28-15.png | 200 px]]
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[[File:Positrons2.png | 200 px]]
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 +
Angular distribution of positrons
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[[File:TF_Theta_04-28-15.png | 200 px]]
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 +
 +
 +
I was unable to do anything other than a gaussian beam right now,  I will try to do one later
 +
 +
For now I have a gaussian with an 8mm RMS and 10 MeV incident electrons as shown below.
 +
 +
The positron and electron momentum distributions after the PbBi converter are shown below
 +
 +
 +
[[File:4-30-2015_PositronMomentum_2mm.png| 200 px]][[File:4-30-2015_ElectronMomentum_2mm.png| 200 px]]
 +
 +
A comma delimited text file with the above events in the format of
 +
 +
x,y,z,Px,Py,Pz
 +
 +
in units of cm for distance and MeV for momentum is located at
 +
 +
for positrons
 +
 +
http://www2.cose.isu.edu/~foretony/Positrons_2mm10MeV.dat
 +
 +
 +
and
 +
 +
http://www2.cose.isu.edu/~foretony/Electrons_2mm10MeV.dat
 +
 +
 +
for electrons
 +
 +
For now I have a gaussian with an 1mm RMS and 10 MeV incident electrons as shown below.
 +
 +
[[File:4-30-2015_BeamPosDelta.png| 200 px]][[File:4-30-2015_ElectronMomentum.png| 200 px]]
 +
 +
 +
The positron and electron momentum distributions after the PbBi converter are shown below
 +
 +
 +
[[File:4-30-2015_PositronMomentum_2mmDelta.png| 200 px]][[File:4-30-2015_ElectronMomentum_2mmDelta.png| 200 px]]
 +
 +
A comma delimited text file with the above events in the format of
 +
 +
x,y,z,Px,Py,Pz
 +
 +
in units of cm for distance and MeV for momentum is located at
 +
 +
for positrons
 +
 +
http://www2.cose.isu.edu/~foretony/Positrons_2mm10MeVDelta.dat
 +
 +
 +
and
 +
 +
http://www2.cose.isu.edu/~foretony/Electrons_2mm10MeVDelta.dat
 +
 +
 +
for electrons
  
  
 
[[G4Beamline_PbBi#Target_thickness_optimization]]
 
[[G4Beamline_PbBi#Target_thickness_optimization]]

Revision as of 16:43, 1 May 2015

First simple test is to send 1 million, 10 MeV electrons towards a PbBi target and count how many positrons leave the downstream side

The Random number seed is set by Time in G4beamline to use a different set of pseudo random numbers each time it is run

The G4Beamlin incident electron beam has the following properties 

beam gaussian particle=e- nEvents=1000000 beamZ=0.0 
        sigmaX=1.0 sigmaY=1.0 sigmaXp=0.100 sigmaYp=0.100 
        meanMomentum=10.0 sigmaP=4.0 meanT=0.0 sigmaT=0.0


-
PbBi Thickness (mm) #positrons/million electrons (G4Beamline) #positrons/million electrons (MCNPX)
1 960,874, 916,934,897=916 +/- 33 1091
1.5 1508 1728
2 1963,1919,1880,1877,1970 = 1902 [math]\pm[/math] 43 1984
2.5 1997 2062
3 2233,2250, 2251,2226 , 2222=2236 [math]\pm[/math] 13 1986
3.5 2193 1938
4 2184,2156,2089,2173,2181=2157 [math]\pm[/math] 39 1858
5 2042 1646
6 1851, 1932, 1857, 1896,1924 = 1892[math] \pm[/math] 37 1541
10 1480,1488 1216

Comparison of G4Beamline and MCNPX


Comparison.png


Energy Distribution

TF PosE 04-28-15.png Positrons2.png

Angular distribution of positrons

TF Theta 04-28-15.png


I was unable to do anything other than a gaussian beam right now, I will try to do one later

For now I have a gaussian with an 8mm RMS and 10 MeV incident electrons as shown below.

The positron and electron momentum distributions after the PbBi converter are shown below


4-30-2015 PositronMomentum 2mm.png4-30-2015 ElectronMomentum 2mm.png

A comma delimited text file with the above events in the format of

x,y,z,Px,Py,Pz

in units of cm for distance and MeV for momentum is located at

for positrons

http://www2.cose.isu.edu/~foretony/Positrons_2mm10MeV.dat


and

http://www2.cose.isu.edu/~foretony/Electrons_2mm10MeV.dat


for electrons

For now I have a gaussian with an 1mm RMS and 10 MeV incident electrons as shown below.

4-30-2015 BeamPosDelta.png4-30-2015 ElectronMomentum.png


The positron and electron momentum distributions after the PbBi converter are shown below


4-30-2015 PositronMomentum 2mmDelta.png4-30-2015 ElectronMomentum 2mmDelta.png

A comma delimited text file with the above events in the format of

x,y,z,Px,Py,Pz

in units of cm for distance and MeV for momentum is located at

for positrons

http://www2.cose.isu.edu/~foretony/Positrons_2mm10MeVDelta.dat


and

http://www2.cose.isu.edu/~foretony/Electrons_2mm10MeVDelta.dat


for electrons


G4Beamline_PbBi#Target_thickness_optimization

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