G4Beamline PbBi - Revision history

Foretony: /* Task List */

2016-06-08T21:39:26Z

Task List

← Older revision		Revision as of 21:39, 8 June 2016
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	=Task List=		=Task List=

			0.) 34.8 mm pipe, 0.0 -> 0.5 Tesla, E= 6,8,10 MeV.


	1.) Create a positron (10,000 positrons) and electron event file containing t,x,y,z,Px,Py,Pz for positrons exiting the solenoid and an incident Gaussian beam 1cm in diameter and with a sigma of 1cm.		1.) Create a positron (10,000 positrons) and electron event file containing t,x,y,z,Px,Py,Pz for positrons exiting the solenoid and an incident Gaussian beam 1cm in diameter and with a sigma of 1cm.

Foretony: /* Background studies */

2016-04-12T21:01:44Z

Background studies

← Older revision		Revision as of 21:01, 12 April 2016
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	insert photon spacial distributions		insert photon spacial distributions

	Now ~~mow~~ the scoring region downstream to a position representing the location of a NaI detector.		Now move the scoring region downstream to a position representing the location of a NaI detector.

	=Beam Line Design=		=Beam Line Design=

Foretony: /* Reports */

2016-04-12T17:16:11Z

Reports

← Older revision		Revision as of 17:16, 12 April 2016
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	==Niowave_9-2015==		==[[Niowave_9-2015]]==
	==Niowave_10-2015==		==[[Niowave_10-2015]]==
	==Niowave_11-2015==		==[[Niowave_11-2015]]==
	==Niowave_12-2015==		==[[Niowave_12-2015]]==
	==Niowave_1-2016==		==[[Niowave_1-2016]]==
	==Niowave_2-2016==		==[[Niowave_2-2016]]==
	==Niowave_3-2016==		==[[Niowave_3-2016]]==
	==Niowave_4-2016==		==[[Niowave_4-2016]]==
	==Niowave_5-2016==		==[[Niowave_5-2016]]==
	==Niowave_6-2016==		==[[Niowave_6-2016]]==

	=Task List=		=Task List=

Foretony: /* Reports */

2016-04-12T17:15:22Z

Reports

← Older revision		Revision as of 17:15, 12 April 2016
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	[[Niowave_Report_11-30-2015]]		[[Niowave_Report_11-30-2015]]


			deadline 4/12/16


			==Niowave_9-2015==
			==Niowave_10-2015==
			==Niowave_11-2015==
			==Niowave_12-2015==
			==Niowave_1-2016==
			==Niowave_2-2016==
			==Niowave_3-2016==
			==Niowave_4-2016==
			==Niowave_5-2016==
			==Niowave_6-2016==

	=Task List=		=Task List=

Foretony: /* Background studies */

2016-04-07T22:12:55Z

Background studies

← Older revision		Revision as of 22:12, 7 April 2016
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	=Background studies=		=Background studies=

			==Brem Spectrum==

			Below is the photon energy distribution (from Brem & pair production) using a 2mm Pb target for two different incident electron energies; 6 and 10 MeV. The photons are 1 cm downstream of the target and intersection a large forward region.

	[[File:PbBi_Brem_6-10MeV_4-7-16.png \| 200 px]]		[[File:PbBi_Brem_6-10MeV_4-7-16.png \| 200 px]]

			insert photon spacial distributions

			Now mow the scoring region downstream to a position representing the location of a NaI detector.

	=Beam Line Design=		=Beam Line Design=

Foretony: /* Beam Line Design */

2016-04-07T22:09:15Z

Beam Line Design

← Older revision		Revision as of 22:09, 7 April 2016
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	;Conclusion 2 : You loose about 28 +/- 4 % of the positrons in the 0.25 mm thick SS exit window.		;Conclusion 2 : You loose about 28 +/- 4 % of the positrons in the 0.25 mm thick SS exit window.

			=Background studies=


			[[File:PbBi_Brem_6-10MeV_4-7-16.png \| 200 px]]


	=Beam Line Design=		=Beam Line Design=

Foretony: /* Positron & Electron event files */

2016-02-17T17:31:14Z

Positron & Electron event files

← Older revision		Revision as of 17:31, 17 February 2016
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	[[PbBi_PosEventFiles_VaccumGaps_2015]]		[[PbBi_PosEventFiles_VaccumGaps_2015]]


	[[PbBi_PosEventFiles_NoGaps_2016]]		[[PbBi_PosEventFiles_NoGaps_2016]]

Foretony: /* Target thickness optimization */

2016-02-17T17:28:22Z

Target thickness optimization

← Older revision		Revision as of 17:28, 17 February 2016
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	=Target thickness optimization=		=Target thickness optimization=

			==[[PbBi_THickness_CylinderBeam]]==

	==[[PbBi_THickness_GaussBeam]]==		==[[PbBi_THickness_GaussBeam]]==

	~~==[[PbBi_THickness_CylinderBeam]]==~~

	== [[PbBi_THickness_PntSource]]==		== [[PbBi_THickness_PntSource]]==

Foretony: /* Positron & Electron event files */

2016-02-11T16:50:26Z

Positron & Electron event files

← Older revision		Revision as of 16:50, 11 February 2016
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	[[PbBi_PosEventFiles_VaccumGaps_2015]]		[[PbBi_PosEventFiles_VaccumGaps_2015]]


			[[PbBi_PosEventFiles_NoGaps_2016]]

	==Solenoid Map==		==Solenoid Map==

Foretony: /* Positron & Electron event files */

2016-02-11T16:49:25Z

Positron & Electron event files

← Older revision		Revision as of 16:49, 11 February 2016
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	[[PbBi_PosEventFiles_VaccumGaps_2015]]		[[PbBi_PosEventFiles_VaccumGaps_2015]]

	Event files were generated assuming an ideal solenoid having an inner radius of 2.527 cm surrounding a beam pipe with a radius of 1.74 cm. Electrons impinge a 2mm thick PbBi liquid target that has a surface area of 2.54 cm x 2.54 cm. Stainless steel windows 0.25 mm thick sandwhich the PbBi target at locations Z= -90.325 and Z= -89.875 cm. The target is located at Z =-90.1 cm and the beam begins 20 cm upstream at Z = -110.1 cm. The incident electron beam is a 0.5 cm radius cylinder.

	~~===Positrons exiting the Solenoid===~~

	~~The solenoid design has changed such that the max field is 0.20 Tesla (0.22) and its length is 150 mm.~~




	~~{\| border="1"~~
	~~\| [[File:TF_Niowave_SolenoidDesign_12-04-15.png \| 200 px]] \|\| [[File:TF_LBEtarg1_1-12-16.png \| 200 px]]\|\| [[File:TF_LBEposEvent_1-12-16.png \| 200 px]]~~

	\|-
	\| Overall Target layout \|\| Closeup of Target Simulation Geometry. The center of the 0.25mm thick stainless steel windows are a distance of 2.25 mm from the center of the LBE target. <math>d_{USS} = d_{DSS} =</math> 2.25 mm, <math>t_{LBE}=2</math> mm, <math>t_{SS} =</math> .25 mm. \|\| An example positron production event. The yellow lines represents a sensitive detector used to record all positron events. The red line represents the incident 10 MeV electron that produces two bremsstrahlung photons shown in green. The first photon has an energy of 2.151 MeV and pair produces in the stainless steel window. The second photon has an energy of 1.393 MeV and exits the system without interacting. The first photon is created at time t= 3.323 ns. The first photon produces a 234.6 keV electron and a 894.2 keV positron at time t=3.336 ns. Only the positron has enough energy to exit the stainless steel window.
	~~\|+ Apparatus~~
	\|}


	~~In other words I should generate position and momentum files for positrons and electrons at the Z location 15 cm downstream from the middle of the LBE target and within a 3.48 cm diameter beam pipe.~~

	~~/vis/viewer/zoom 2~~

	~~/gps/pos/centre 0.0 0.0 -150.~~

	~~/vis/viewer/panTo -90.1 0 cm~~

	~~/vis/viewer/reset~~


	Twenty (20) million incident electrons with an energy of 10 MeV and forming a cylindrical beam with a 0.5 cm radius cylinder impinged a 2mm thick LBE target located at Z = -106 mm. The Z location of positrons exiting the beam pipe at the end of the 15 cm long solenoid is 44 mm. The positrons are 150.00 mm from the middle of the LBE target (Z=44mm).

	~~A space delimited text file with the above events in the format of~~

	~~PID, x(mm),y,z,Px,Py,Pz(MeV),t(ns)~~

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

	~~for positrons~~

	~~http://www2.cose.isu.edu/~foretony/Positrons_2mm10MeVCyl.dat~~


	~~and~~

	~~http://www2.cose.isu.edu/~foretony/Electrons_2mm10MeVCyl.dat~~

	~~The file below contains all the positrons that were created at the target~~

	~~format~~


	~~A space delimited text file with the above events in the format of~~

	Initial electron (x,y,z,Px,Py,Pz), Final electron (t,x,y,z,Px,Py,Pz), Positron location after leaving LBE target (t,x,y,z,Px,Py,Pz),Location of positron as it exits a SS window (t,x,y,z,Px,Py,Pz). Units are ns, mm, MeV/c.

	~~http://www2.cose.isu.edu/~foretony/AllPositrons_2mm10MeVCyl.dat~~


	~~{\| border="1"~~
	~~\| [[File:PositronTime_1-10-16.png\|200px]] \|\|~~
	\|-
	\| Particle flight times for 20 million incident electrons on a 0.2mm thick LBE target with 0.25 mm thick stainless steel windows (no material exists after the last stainless steel window, only vacuum). The time an electron brems in the target (EscatTime) is shown in black. The time a positron is created in the target (PosTime) is shown in blue. The time a positron has traveled 15 cm traversing a uniform 0.2 Tesla Solenoidal field (PosBeamTime) is shown in fuchsia. The field exists throughout the entire world. PosBeamTimeCuts are positrons that are constrained to a beam pipe diameter of 34.8 mm. Positrons are traveling about the speed of light (30 cm/ns) so after 15 cm they arrived 0.5 nsec after the initial electron beam impinges the target.
	~~\|+ Positron Distributions~~
	\|}


	~~===Positrons and Electrons after the SS Exit window===~~

	~~The same configuration as the previous subsection except that the 1mm thick sensitive detector is placed at~~
	~~Z = -100.5 mm. Most of the electrons exit at Z = -100.9 mm.~~

	~~A space delimited text file with the above events in the format of~~

	~~PID, x(mm),y,z,Px,Py,Pz(MeV),t(ns)~~

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

	~~for positrons~~
	~~23500 Positrons in the file below~~

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


	~~and~~

	~~297216 electrons in the file below~~

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

	==Solenoid Map==		==Solenoid Map==