#meta full request: /GEOMETRY/CylindricalGEM_HDDS.xml:90011:mc_vertex:2021-09-07_19-45-19
#meta variation: mc_vertex
#meta created: 2021-09-07 19:45:19
#meta run range: 90011 - 90011
#meta author: ijaegle

#just drifts

#& xml
<?xml version="1.0" encoding="UTF-8"?>
<!--DOCTYPE HDDS>

  Hall D Geometry Data Base: Forward MWPC for Charged Pion Polarizability
  **************************************************

     version 1.0: Initial version	-DL
	 
By default this detector is not enabled in the standard Hall-D geometry in
HDDS. Here is how to enable it and the rest of the geometry changes needed
for the CPP experiment:

in main_HDDS.xml
=================
1. uncomment the line for the ForwardMWPC in the "forwardPackage" compisition

2. comment out the line for the ComptonEMcal in the "forwardPackage" compisition
   (since it occupies the same space)

3. 


 
<HDDS specification="v1.0" xmlns="http://www.gluex.org/hdds">
-->

<section name        = "CylindricalGEM"
         version     = "1.1"
         date        = "2020-12-07"
         author      = "I. Jaegle"
         top_volume  = "CGEMMother"
         specification = "v1.0">

<!-- Origin of CCGEM is center of target -->

<!-- 
  3 gaps w/ ArCO2:70:30 totaling 1cm of space in R
-->

 <composition name="CylindricalGEM" >
   
   <posXYZ volume="CGEMMother" X_Y_Z="0.0 0.0 0.0"/>
   
 </composition>

 <composition name="CGEMMother" envelope="CGEM">



   <posXYZ volume="Dri3" X_Y_Z="0.0 0.0 0.0">
     <layer value="3"/>
   </posXYZ>

   <posXYZ volume="Dri2" X_Y_Z="0.0 0.0 0.0">
     <layer value="2"/>
   </posXYZ>

   <posXYZ volume="Dri1" X_Y_Z="0.0 0.0 0.0">
     <layer value="1"/>
   </posXYZ>

 </composition>

 <tubs name="CGEM" Rio_Z="4.5000 6.9423 35.00"  material="Air" comment="CGEM mother air volume" />



 <tubs name="Dri3" Rio_Z="6.3388 6.7388 35.00"  material="FDchamberGas" sensitive="true" comment="Drift gap module 3 layer 5" />
 <tubs name="Dri2" Rio_Z="5.5247 5.9247 35.00"  material="FDchamberGas" sensitive="true" comment="Drift gap module 2 layer 5" />
 <tubs name="Dri1" Rio_Z="4.7106 5.1106 35.00"  material="FDchamberGas" sensitive="true" comment="Drift gap module 1 layer 5" />

</section>