Difference between revisions of "G4Beamline PbBi"

From New IAC Wiki
Jump to navigation Jump to search
Line 61: Line 61:
 
|}
 
|}
  
 +
 +
 +
{| border="1"
 +
{| border="1"
 +
| PbBi Thickness (mm) || #positrons/million electrons (G4Beamline)|| #positrons/million electrons (MCNPX)
 +
| PbBi Thickness (mm) || #positrons/million electrons (G4Beamline)|| #positrons/million electrons (MCNPX)
 +
|-
 +
|-
 +
-
 +
| 1    || 960,874, 916,934,897=916 +/- 33 || 1091
 +
+
 +
| 1    ||  || 1091
 +
|-
 +
|-
 +
-
 +
| 1.5    || 1508 || 1728
 +
+
 +
| 1.5    ||  || 1728
 +
|-
 +
|-
 +
-
 +
| 2    || 1963,1919,1880,1877,1970 = 1902 <math>\pm</math> 43 || 1984
 +
+
 +
| 2    || 1902<math>\pm</math> 43 || 1984
 +
|-
 +
|-
 +
-
 +
| 2.5    || 1997 || 2062
 +
+
 +
| 2.5    ||  || 2062
 +
|-
 +
|-
 +
-
 +
| 3|| 2233,2250, 2251,2226 , 2222=2236 <math>\pm</math> 13|| 1986
 +
+
 +
| 3|| <math>\pm</math> 13|| 1986
 +
|-
 +
|-
 +
-
 +
| 3.5|| 2193 || 1938
 +
+
 +
| 3.5||  || 1938
 +
|-
 +
|-
 +
-
 +
| 4|| 2184,2156,2089,2173,2181=2157 <math>\pm</math> 39 || 1858
 +
+
 +
| 4||<math>\pm</math> 39 || 1858
 +
|-
 +
|-
 +
-
 +
| 5|| 2042 || 1646
 +
+
 +
| 5||  || 1646
 +
|-
 +
|-
 +
-
 +
| 6|| 1851, 1932, 1857, 1896,1924 = 1892<math> \pm</math> 37 || 1541
 +
+
 +
| 6|| <math> \pm</math> 37 || 1541
 +
|-
 +
|-
 +
-
 +
| 10|| 1480,1488 || 1216
 +
+
 +
| 10||  || 1216
 +
|-
 +
|-
 +
|}
 
Comparison of G4Beamline and MCNPX
 
Comparison of G4Beamline and MCNPX
  

Revision as of 16:30, 1 May 2015

Development of a Positron source using a PbBi converter and a Solenoid

Converter target properties

Definition of Lead Bismuth


1cm diameter target 2 mm thick PbBi

0.5 Tesla solenoid

G4BeamLine and MCNPX

Target thickness optimization

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

G4beamline pencil beam 10 cm radius

beam ellipse particle=e- nEvents=1000000 beamZ=0.0 beamX=0. beamY=0. \
        sigmaX=10.0 sigmaY=10.0 sigmaXp=0.000 sigmaYp=0.000 \
      meanMomentum=10. sigmaE=0. maxR=10.
PbBi Thickness (mm) #positrons/million electrons (G4Beamline) #positrons/million electrons (MCNPX)
1 1091
1.5 1728
2 1902[math]\pm[/math] 43 1984
2.5 2062
3 [math]\pm[/math] 13 1986
3.5 1938
4 [math]\pm[/math] 39 1858
5 1646
6 [math] \pm[/math] 37 1541
10 1216


- - - - - - - - - -
PbBi Thickness (mm) #positrons/million electrons (G4Beamline) #positrons/million electrons (MCNPX) PbBi Thickness (mm) #positrons/million electrons (G4Beamline) #positrons/million electrons (MCNPX)
1 960,874, 916,934,897=916 +/- 33 1091

+

1 1091
1.5 1508 1728

+

1.5 1728
2 1963,1919,1880,1877,1970 = 1902 [math]\pm[/math] 43 1984

+

2 1902[math]\pm[/math] 43 1984
2.5 1997 2062

+

2.5 2062
3 2233,2250, 2251,2226 , 2222=2236 [math]\pm[/math] 13 1986

+

3 [math]\pm[/math] 13 1986
3.5 2193 1938

+

3.5 1938
4 2184,2156,2089,2173,2181=2157 [math]\pm[/math] 39 1858

+

4 [math]\pm[/math] 39 1858
5 2042 1646

+

5 1646
6 1851, 1932, 1857, 1896,1924 = 1892[math] \pm[/math] 37 1541

+

6 [math] \pm[/math] 37 1541
10 1480,1488 1216

+

10 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


2mm thick PbBi, 10 MeV, 1 cm cylindrical incident electron distribution

Layout.png

ElectronTracks.pngPhotonTracks.png

ElectronEnergy.pngPhotonEnergy.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

2mm thick PbBi, 10 MeV, point source

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 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

Solenoid

Positrons#Simulations