Difference between revisions of "Aluminum Thickness Tests"

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=No Photon Physics=
 
=No Photon Physics=
−
Varying Aluminum beamstop thickness
 
  
−
Tantalum thickness of 0.0508cm
+
:Varying Aluminum beamstop thickness
  
−
All electron physics turned on
+
:Tantalum thickness of 0.0508cm
  
−
Chamber and Tracker matter is vacuum
+
:All electron physics turned on
  
 +
:No photon physics turned on
  
−
[[File:1RadLengthAl.png|400px|thumb|left]] [[File:Five_eighths_inch_Al.png|400px|thumb|center]]
+
:Chamber and Tracker matter is vacuum
  
−
[[File:Half_inch_Al.png|400px|thumb|left]] [[File:Half_Rad_Length_Al.png|400px|thumb|center]]
+
:1 Radiation Length of Aluminum is 8.897cm
  
−
[[File:One_quarter_Rad_Length_Al.png|400px|thumb|left]]
+
:1 million electrons incident on Tantalum, single file
  
−
 
+
{| border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
−
 
 
−
 
 
−
{| border="2" style="text-align:center;" |cellpadding="20" cellspacing="0
 
 
|-
 
|-
−
|   Changing Aluminum Thickness   ||  Z Position of Photon Creation
+
| Aluminum Thickness || Photon Kinetic Energy Spectrum  ||  Z Position of Photon Creation || Volume of Photon Creation
 
|-
 
|-
−
|[[File:1RadLengthAl.png|400px|thumb|left]] || [[File:oneRadLengthAl_ZPos.png|400px|thumb|left]]
+
|8.897cm || [[File:1RadLengthAl.png|200px]] || [[File:oneRadLengthAl_ZPos.png|200px]] || [[File:oneRadLengthAl_Volume.png|200px]]
 
|-
 
|-
−
|[[File:Five_eighths_inch_Al.png|400px|thumb|center]] || [[File:Five_eighths_inch_Al_ZPos.png|400px|thumb|center]]
+
|4.4485cm || [[File:Half_Rad_Length_Al.png|200px]] || [[File:Half_Rad_Length_Al_ZPos.png|200px|]] || [[File:Half_Rad_Length_Al_Volume.png|200px|]]
 
|-
 
|-
−
|[[File:Half_inch_Al.png|400px|thumb|left]] || [[File:Half_inch_Al_ZPos.png|400px|thumb|left]]
+
|2.22425cm || [[File:One_quarter_Rad_Length_Al.png|200px]] || [[File:One_quarter_Rad_Length_Al_ZPos.png|200px]] || [[File:One_quarter_Rad_Length_Al_Volume.png|200px]]
 
|-
 
|-
−
|[[File:Half_Rad_Length_Al.png|400px|thumb|center]] || [[File:Half_Rad_Length_Al_ZPos.png|400px|thumb|center]]
+
|1.5875cm (5/8") || [[File:Five_eighths_inch_Al.png|200px]] || [[File:Five_eighths_inch_Al_ZPos.png|200px]] || [[File:Five_eighths_inch_Al_Volume.png|200px]]
 
|-
 
|-
−
|[[File:One_quarter_Rad_Length_Al_ZPos.png|400px|thumb|left]] || [[File:One_quarter_Rad_Length_Al.png|400px|thumb|left]]
+
|1.27cm (1/2") || [[File:Half_inch_Al.png|200px]] || [[File:Half_inch_Al_ZPos.png|200px]] || [[File:Half_inch_Al_Volume.png|200px]]
 
|-
 
|-
 
|}
 
|}
  
 +
Note: Volume 1 = Target, Volume 2 = Beamstop, Volume 3 = Tracker, Volume 4 = Chamber, Volume 5 = else
  
 +
==Conclusion==
 +
Without photon physics active and vacuum in the tracker and chamber, I cannot say whether electrons are making it though the target and beamstop.
  
 +
===Where are the <300KeV photons from?===
  
 +
:Tantalum thickness of 0.0508cm
  
 +
:All electron physics turned on
  
 +
:No photon physics turned on
  
 +
:Chamber and Tracker matter is vacuum
  
 +
:1 Radiation Length of Aluminum is 8.897cm
  
 +
:1 million electrons incident on Tantalum, single file
  
 +
:No beamstop present
  
 +
{| border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
 +
|-
 +
|Physics || Photon Kinetic Energy Spectrum (Vacuum) ||  Photon Kinetic Energy Spectrum (Air)
 +
|-
 +
|Photon Physics Off || [[File:No_Bs_e-_test.png|200px]] || [[File:No_Bs_Air_e-_test.png|200px]]
 +
|-
 +
|Photon Physics On || [[File:PhotonPhysOn_No_Bs.png|200px]]  || [[File:PhotonPhysOn_No_Bs_Air.png|200px]]
 +
|-
 +
|}
  
 +
====Conclusion====
 +
It is easy to see in these images that adding in air to the simulation creates the low energy photons. Although this peak is not as pronounced or have anywhere near as many photons as when the beamstop is present, therefore it is a combination of air in the tracker/chamber and the presences of an aluminum beamstop that is responsible for the low energy photons.
  
 +
=Photon Physics On=
  
 +
:Varying Aluminum beamstop thickness
  
 +
:Tantalum thickness of 0.0508cm
  
 +
:All electron physics turned on
  
 +
:All photon physics turned on
  
 +
:Chamber and Tracker matter is vacuum
  
 +
:1 Radiation Length of Aluminum is 8.897cm
  
 +
:1 million electrons incident on Tantalum, single file
  
 +
{| border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
 +
|-
 +
| Aluminum Thickness || Photon Kinetic Energy Spectrum  ||  Z Position of Photon Creation || Volume of Photon Creation
 +
|-
 +
|8.897cm || [[File:1RadLengthAl_PhotonPhysOn.png|200px]] || [[File:PhotonPhysOn_oneRadLengthAl_ZPos.png|200px]] [[File:PhotonPhysOn_oneRadLengthAl_ZPos_Grass.png|200px]] || [[File:PhotonPhysOn_oneRadLengthAl_Volume.png|200px]]
 +
|-
 +
|1.5875cm (5/8") || [[File:PhotonPhysOn_five_eighths_inch_Al.png|200px]] || [[File:PhotonPhysOn_five_eighths_inch_Al_ZPos.png|200px]] [[File:PhotonPhysOn_five_eighths_inch_Al_ZPos_Grass.png|200px]] || [[File:PhotonPhysOn_five_eighths_inch_Al_Volume.png|200px]]
 +
|-
 +
|1.27cm (1/2") || [[File:PhotonPhysOn_Half_inch_Al.png|200px]] || [[File:PhotonPhysOn_Half_inch_Al_ZPos.png|200px]] [[File:PhotonPhysOn_Half_inch_Al_ZPos_Grass.png|200px]] || [[File:PhotonPhysOn_Half_inch_Al_Volume.png|200px]]
 +
|-
 +
|4.4485cm || [[File:PhotonPhysOn_Half_Rad_Length_Al.png|200px]] || [[File:PhotonPhysOn_Half_Rad_Length_Al_ZPos.png|200px]] [[File:PhotonPhysOn_Half_Rad_Length_Al_ZPos_Grass.png|200px]] || [[File:PhotonPhysOn_Half_Rad_Length_Al_Volume.png|200px]]
 +
|-
 +
|2.22425cm || [[File:PhotonPhysOn_one_quarter_Rad_Length_Al.png|200px]] || [[File:PhotonPhysOn_one_quarter_Rad_Length_Al_Zpos.png|200px]] [[File:PhotonPhysOn_one_quarter_Rad_Length_Al_Zpos_Grass.png|200px]] || [[File:PhotonPhysOn_one_quarter_Rad_Length_Al_Volume.png|200px]]
 +
|-
 +
|}
 +
 +
Note: Volume 1 = Target, Volume 2 = Beamstop, Volume 3 = Tracker, Volume 4 = Chamber, Volume 5 = else
 +
 +
==Conclusion==
  
  
  
 +
===Why is tail 16 cm long?===
  
−
== Z position ==
+
I am going to rerun the 1 rad length simulation to see if i get the same result which will help me determine if i had an error in which matter i used in tracker/chamber, etc.
  
 +
=Photon Physics On with Air in Chamber and Tracker=
 +
:Varying Aluminum beamstop thickness
  
 +
:Tantalum thickness of 0.0508cm
  
 +
:All electron physics turned on
  
 +
:All photon physics turned on
  
 +
:Chamber and Tracker matter is air (70% Nitrogen, 30% Oxygen)
 +
 +
:1 Radiation Length of Aluminum is 8.897cm
 +
 +
:1 million electrons incident on Tantalum, single file
 +
 +
{| border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
 +
|-
 +
| Aluminum Thickness || Photon Kinetic Energy Spectrum  ||  Z Position of Photon Creation || Volume of Photon Creation
 +
|-
 +
|8.897cm || [[File:Air_PhotonPhysOn_1RadLengthAl.png|200px]] || [[File:Air_PhotonPhysOn_oneRadLengthAl_ZPos.png|200px]] || [[File:Air_PhotonPhysOn_oneRadLengthAl_Volume.png|200px]]
 +
|-
 +
|1.5875cm (5/8") || [[File:Air_PhotonPhysOn_Five_eighths_inch_Al.png|200px]] || [[File:Air_PhotonPhysOn_Five_eighths_inch_Al_ZPos.png|200px]] || [[File:Air_PhotonPhysOn_Five_eighths_inch_Al_Volume.png|200px]]
 +
|-
 +
|1.27cm (1/2") || [[File:Air_PhotonPhysOn_Half_inch_Al.png|200px]] || [[File:Air_PhotonPhysOn_Half_inch_Al_ZPos.png|200px]] || [[File:Air_PhotonPhysOn_Half_inch_Al_Volume.png|200px]]
 +
|-
 +
|4.4485cm || [[File:Air_PhotonPhysOn_Half_Rad_Length_Al.png|200px]] || [[File:Air_PhotonPhysOn_Half_Rad_Length_Al_ZPos.png|200px]] || [[File:Air_PhotonPhysOn_Half_Rad_Length_Al_Volume.png|200px]]
 +
|-
 +
|2.22425cm || [[File:Air_PhotonPhysOn_One_quarter_Rad_Length_Al.png|200px]] || [[File:Air_PhotonPhysOn_One_quarter_Rad_Length_Al_ZPos.png|200px]] || [[File:Air_PhotonPhysOn_One_quarter_Rad_Length_Al_Volume.png|200px]]
 +
|-
 +
|}
  
 +
::Note: Volume 1 = Target, Volume 2 = Beamstop, Volume 3 = Tracker, Volume 4 = Chamber, Volume 5 = else
  
−
[[File:oneRadLengthAl_ZPos.png|400px|thumb|left]] [[File:Five_eighths_inch_Al_ZPos.png|400px|thumb|center]]
+
==Conclusion==
  
−
[[File:Half_inch_Al_ZPos.png|400px|thumb|left]] [[File:Half_Rad_Length_Al_ZPos.png|400px|thumb|center]]
 
  
−
[[File:One_quarter_Rad_Length_Al_ZPos.png|400px|thumb|left]]
 
  
  

Latest revision as of 20:08, 18 October 2017

No Photon Physics

Varying Aluminum beamstop thickness
Tantalum thickness of 0.0508cm
All electron physics turned on
No photon physics turned on
Chamber and Tracker matter is vacuum
1 Radiation Length of Aluminum is 8.897cm
1 million electrons incident on Tantalum, single file
Aluminum Thickness Photon Kinetic Energy Spectrum Z Position of Photon Creation Volume of Photon Creation
8.897cm 1RadLengthAl.png OneRadLengthAl ZPos.png OneRadLengthAl Volume.png
4.4485cm Half Rad Length Al.png Half Rad Length Al ZPos.png Half Rad Length Al Volume.png
2.22425cm One quarter Rad Length Al.png One quarter Rad Length Al ZPos.png One quarter Rad Length Al Volume.png
1.5875cm (5/8") Five eighths inch Al.png Five eighths inch Al ZPos.png Five eighths inch Al Volume.png
1.27cm (1/2") Half inch Al.png Half inch Al ZPos.png Half inch Al Volume.png

Note: Volume 1 = Target, Volume 2 = Beamstop, Volume 3 = Tracker, Volume 4 = Chamber, Volume 5 = else

Conclusion

Without photon physics active and vacuum in the tracker and chamber, I cannot say whether electrons are making it though the target and beamstop.

Where are the <300KeV photons from?

Tantalum thickness of 0.0508cm
All electron physics turned on
No photon physics turned on
Chamber and Tracker matter is vacuum
1 Radiation Length of Aluminum is 8.897cm
1 million electrons incident on Tantalum, single file
No beamstop present
Physics Photon Kinetic Energy Spectrum (Vacuum) Photon Kinetic Energy Spectrum (Air)
Photon Physics Off No Bs e- test.png No Bs Air e- test.png
Photon Physics On PhotonPhysOn No Bs.png PhotonPhysOn No Bs Air.png

Conclusion

It is easy to see in these images that adding in air to the simulation creates the low energy photons. Although this peak is not as pronounced or have anywhere near as many photons as when the beamstop is present, therefore it is a combination of air in the tracker/chamber and the presences of an aluminum beamstop that is responsible for the low energy photons.

Photon Physics On

Varying Aluminum beamstop thickness
Tantalum thickness of 0.0508cm
All electron physics turned on
All photon physics turned on
Chamber and Tracker matter is vacuum
1 Radiation Length of Aluminum is 8.897cm
1 million electrons incident on Tantalum, single file
Aluminum Thickness Photon Kinetic Energy Spectrum Z Position of Photon Creation Volume of Photon Creation
8.897cm 1RadLengthAl PhotonPhysOn.png PhotonPhysOn oneRadLengthAl ZPos.png PhotonPhysOn oneRadLengthAl ZPos Grass.png PhotonPhysOn oneRadLengthAl Volume.png
1.5875cm (5/8") PhotonPhysOn five eighths inch Al.png PhotonPhysOn five eighths inch Al ZPos.png PhotonPhysOn five eighths inch Al ZPos Grass.png PhotonPhysOn five eighths inch Al Volume.png
1.27cm (1/2") PhotonPhysOn Half inch Al.png PhotonPhysOn Half inch Al ZPos.png PhotonPhysOn Half inch Al ZPos Grass.png PhotonPhysOn Half inch Al Volume.png
4.4485cm PhotonPhysOn Half Rad Length Al.png PhotonPhysOn Half Rad Length Al ZPos.png PhotonPhysOn Half Rad Length Al ZPos Grass.png PhotonPhysOn Half Rad Length Al Volume.png
2.22425cm PhotonPhysOn one quarter Rad Length Al.png PhotonPhysOn one quarter Rad Length Al Zpos.png PhotonPhysOn one quarter Rad Length Al Zpos Grass.png PhotonPhysOn one quarter Rad Length Al Volume.png

Note: Volume 1 = Target, Volume 2 = Beamstop, Volume 3 = Tracker, Volume 4 = Chamber, Volume 5 = else

Conclusion

Why is tail 16 cm long?

I am going to rerun the 1 rad length simulation to see if i get the same result which will help me determine if i had an error in which matter i used in tracker/chamber, etc.

Photon Physics On with Air in Chamber and Tracker

Varying Aluminum beamstop thickness
Tantalum thickness of 0.0508cm
All electron physics turned on
All photon physics turned on
Chamber and Tracker matter is air (70% Nitrogen, 30% Oxygen)
1 Radiation Length of Aluminum is 8.897cm
1 million electrons incident on Tantalum, single file
Aluminum Thickness Photon Kinetic Energy Spectrum Z Position of Photon Creation Volume of Photon Creation
8.897cm 200px 200px 200px
1.5875cm (5/8") 200px 200px 200px
1.27cm (1/2") 200px 200px 200px
4.4485cm 200px 200px 200px
2.22425cm 200px 200px 200px
Note: Volume 1 = Target, Volume 2 = Beamstop, Volume 3 = Tracker, Volume 4 = Chamber, Volume 5 = else

Conclusion

TriMev Simulations

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