PbBi THickness GaussBeam - Revision history

Foretony at 17:53, 9 December 2015

2015-12-09T17:53:26Z

Foretony at 21:18, 5 June 2015

2015-06-05T21:18:14Z

Foretony at 16:43, 1 May 2015

2015-05-01T16:43:35Z

Foretony: Created page with " G4Beamline_PbBi#Target_thickness_optimization"

2015-05-01T16:42:18Z

Created page with " G4Beamline_PbBi#Target_thickness_optimization"

New page

[[G4Beamline_PbBi#Target_thickness_optimization]]

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   Use Gaussian to make a incident uniform beam that is 1 cm in diameter and has a beam sigma of 1 cm , then cut out the beam to have a 0.5 cm circular radius.
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 for electrons
 [[G4Beamline_PbBi#Target_thickness_optimization]]

← Older revision		Revision as of 21:18, 5 June 2015
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		+
		+	Use Gaussian to make a incident uniform beam that is 1 cm in diameter and has a beam sigma of 1 cm , then cut out the beam to have a 0.5 cm circular radius.
		+

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

← Older revision		Revision as of 16:43, 1 May 2015
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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
		+	</pre>
		+
		+
		+	{\| border="1"
		+	{\| border="1"
		+	\| 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
		+
		+
		+	[[File:Comparison.png \| 200 px]]
		+
		+
		+	Energy Distribution
		+
		+	[[File:TF_PosE_04-28-15.png \| 200 px]]
		+	[[File:Positrons2.png \| 200 px]]
		+
		+	Angular distribution of positrons
		+
		+	[[File:TF_Theta_04-28-15.png \| 200 px]]
		+
		+
		+
		+	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]]