View source for Pb Cylinder (AKA "Temp Shield")

=Creating Lead Cylinder=

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



[[File:TEMPshieldDimension.png|thumbnail |border | center]]




<center><math>tan\ \theta=\frac{60\ mm}{d} \Rightarrow d=\frac{60\ mm}{tan\ 5 \circ} \approx 685\ mm</math></center>


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:
<pre>
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
</pre>
==Geometry File==

[[File:PbCylinder__geometry_basic.txt]]

==Material File==

[[File:PbCylinder materials basic.txt]]

=Modified gcard line=

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

=Gemc Visual=

[[File:TempShield.png]]


=Trial Run=
<pre>
~/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>

No Solenoid, No/0 Torus

[[File:TESTshieldNOSol0Tor.png]]


No Solenoid, 0 Torus

[[File:TESTshieldNOSolTrue0Tor.png]]



1 Sol, 0 Tor

[[File:TESTshield1Sol0Tor.png]]

=Modified Rates=

=Compare With/Without TEMP shield=


{| class="wikitable"
  |+ Comparing Effects of TEMP Shield on Detected Events in DC
|-
  ! Solenoid Field
  ! colspan="2" | With Temp Shield
  ! colspan="2" | 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
|}