Difference between revisions of "Pb Cylinder (AKA "Temp Shield")"

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=Creating Lead Cylinder=
 
=Creating Lead Cylinder=
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For a lead cylinder with outer radius of 60mm, to ensure Moller electrons can clear the material:
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[[File:TEMPshieldDimension.png|thumbnail |border | center]]
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<center><math>tan\ \theta=\frac{60\ mm}{d} \Rightarrow d=\frac{60\ mm}{tan\ 5 \circ} \approx 685\ mm</math></center>
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Since the Geant4 solid is based on it's half-distance with respect to the origin, we need to add 6000 to this to find the starting distance.
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Geometry files follow the format:
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<pre>
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Name: No Spaces
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Mother: root if primary component
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Description: Short explaination
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Position: The center of the object wrt to the vertex
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Rotation:0*deg 0*deg 0*deg
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Type: G4 Tube
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Dimensions: Inner Radius, Outer Radius, Half-Length in z, starting phi position angle of segment ,delta phi angle of segment
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Material: Defined in materials file
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Color:The color entry is a 6 digit hexadecimal number that represents Red, Green and Blue weights from 0 to 255 each in the form: RRGGBB
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Visible: 1=Yes, 0=No
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Style:1=Solid,0=Wireframe
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</pre>
 
==Geometry File==
 
==Geometry File==
  
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~/src/CLAS/GEMC/clas12Tags/4a.2.2/source/gemc -USE_GUI=1 -BEAM_P="e-, 11.0*GeV, 5.0*deg, 10*deg" -BEAM_V="(0, 0, 0)cm" -N=1 eg12.gcard
 
~/src/CLAS/GEMC/clas12Tags/4a.2.2/source/gemc -USE_GUI=1 -BEAM_P="e-, 11.0*GeV, 5.0*deg, 10*deg" -BEAM_V="(0, 0, 0)cm" -N=1 eg12.gcard
 
</pre>
 
</pre>
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No Solenoid, No/0 Torus
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[[File:TESTshieldNOSol0Tor.png]]
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No Solenoid, 0 Torus
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[[File:TESTshieldNOSolTrue0Tor.png]]
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1 Sol, 0 Tor
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[[File:TESTshield1Sol0Tor.png]]
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=Modified Rates=
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=Compare With/Without TEMP shield=
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{| class="wikitable"
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  |+ Comparing Effects of TEMP Shield on Detected Events in DC
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|-
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  ! Solenoid Field
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  ! colspan="2" | With Temp Shield
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  ! colspan="2" | Without Temp Shield
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|-
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  |
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  ! Vacuum
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  ! Air
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  ! Vacuum
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  ! Air
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|-
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  ! No Sol
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  | C
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  | D
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  | E
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  | F
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|-
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  ! 0.5 Sol
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  | C
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  | D
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  | E
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  | F
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|-
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  ! 1.0 Sol
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  | C
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  | D
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  | E
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  | F
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|}

Latest revision as of 19:00, 3 July 2018

Creating Lead Cylinder

For a lead cylinder with outer radius of 60mm, to ensure Moller electrons can clear the material:


TEMPshieldDimension.png



[math]tan\ \theta=\frac{60\ mm}{d} \Rightarrow d=\frac{60\ mm}{tan\ 5 \circ} \approx 685\ mm[/math]


Since the Geant4 solid is based on it's half-distance with respect to the origin, we need to add 6000 to this to find the starting distance.

Geometry files follow the format: 

Name: No Spaces
Mother: root if primary component
Description: Short explaination
Position: The center of the object wrt to the vertex
Rotation:0*deg 0*deg 0*deg
Type: G4 Tube
Dimensions: Inner Radius, Outer Radius, Half-Length in z, starting phi position angle of segment ,delta phi angle of segment
Material: Defined in materials file
Color:The color entry is a 6 digit hexadecimal number that represents Red, Green and Blue weights from 0 to 255 each in the form: RRGGBB
Visible: 1=Yes, 0=No
Style:1=Solid,0=Wireframe

Geometry File

File:PbCylinder geometry basic.txt

Material File

File:PbCylinder materials basic.txt

Modified gcard line

       <detector name="/home/lds/src/CLAS/GEMC/clas12Tags/4a.2.2/experiments/clas12/PbCylinder/PbCylinder"          factory="TEXT" variation="basic"/>

Gemc Visual

TempShield.png


Trial Run

~/src/CLAS/GEMC/clas12Tags/4a.2.2/source/gemc -USE_GUI=1 -BEAM_P="e-, 11.0*GeV, 5.0*deg, 10*deg" -BEAM_V="(0, 0, 0)cm" -N=1 eg12.gcard

No Solenoid, No/0 Torus

TESTshieldNOSol0Tor.png


No Solenoid, 0 Torus

TESTshieldNOSolTrue0Tor.png


1 Sol, 0 Tor

TESTshield1Sol0Tor.png

Modified Rates

Compare With/Without TEMP shield

Comparing Effects of TEMP Shield on Detected Events in DC
Solenoid Field With Temp Shield Without Temp Shield
Vacuum Air Vacuum Air
No Sol C D E F
0.5 Sol C D E F
1.0 Sol C D E F
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