#meta full request: /GEOMETRY/ForwardMWPC_HDDS.xml:0:mc_generic:2017-06-07_18-29-21
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#meta created: 2017-06-07 18:29:21
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#Copied from HDDS, v3.11

#& 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        = "ForwardMWPC"
         version     = "1.0"
         date        = "2015-05-07"
         author      = "D. Lawrence"
         top_volume  = "MWPC"
         specification = "v1.0">

<!-- Origin of ForwardMWPC is center of upstream face of the first MWPC -->

 <composition name="ForwardMWPC" envelope="MWPC">

    <posXYZ volume="CPPChamber"  X_Y_Z="0.0  0.0   1.0"> <layer value="1" /> </posXYZ>
    <posXYZ volume="CPPAbsorber" X_Y_Z="0.0  0.0  13.0" />
    <posXYZ volume="CPPChamber"  X_Y_Z="0.0  0.0  25.0"> <layer value="2" /> </posXYZ>
    <posXYZ volume="CPPAbsorber" X_Y_Z="0.0  0.0  37.0" />
    <posXYZ volume="CPPChamber"  X_Y_Z="0.0  0.0  49.0"> <layer value="3" /> </posXYZ>
    <posXYZ volume="CPPAbsorber" X_Y_Z="0.0  0.0  61.0" />
    <posXYZ volume="CPPChamber"  X_Y_Z="0.0  0.0  73.0"> <layer value="4" /> </posXYZ>
    <posXYZ volume="CPPAbsorber" X_Y_Z="0.0  0.0  85.0" />
    <posXYZ volume="CPPChamber"  X_Y_Z="0.0  0.0  97.0"> <layer value="5" /> </posXYZ>
    <posXYZ volume="CPPAbsorber" X_Y_Z="0.0  0.0 109.0" />
    <posXYZ volume="CPPChamber"  X_Y_Z="0.0  0.0 121.0"> <layer value="6" /> </posXYZ>
    <posXYZ volume="CPPAbsorber" X_Y_Z="0.0  0.0 133.0" />
    <posXYZ volume="CPPChamber"  X_Y_Z="0.0  0.0 145.0"> <layer value="7" /> </posXYZ>
    <posXYZ volume="CPPAbsorber" X_Y_Z="0.0  0.0 157.0" />
    <posXYZ volume="CPPChamber"  X_Y_Z="0.0  0.0 169.0"> <layer value="8" /> </posXYZ>

  </composition>

 <composition name="CPPAbsorber" envelope="CPPA">
    <posXYZ volume="CPPH" X_Y_Z="0.0 0.0 0.0" />
 </composition>

 <composition name="CPPChamber" envelope="CPPF">
    <posXYZ volume="CPPG" X_Y_Z="0.0 0.0 0.0" />
 </composition>

  <box name="MWPC" X_Y_Z="165.0 165.0 340.0"  material="Air" comment="forward MWPC mother" />

  <!-- Absorber block is 64" x 64" x 20cm  with 12cm x 12cm beam hole -->
  <box name="CPPA" X_Y_Z="162.56 162.56 20.0"  material="Iron" comment="Iron Absorber" />
  <box name="CPPH" X_Y_Z="12.0 12.0 20.0"  material="Air" comment="Iron Absorber beam hole" />

  <!-- MWPC frame is 64" x 64" x 2cm  -->
  <box name="CPPF" X_Y_Z="162.56 162.56 2.0"  material="FR-4" comment="G10 frame" />

  <!-- MWPC gas is 60" x 60" x 2cm  -->
  <box name="CPPG" X_Y_Z="152.4 152.4 2.0"  material="FDchamberGas" 
       sensitive="true" comment="Chamber gas" />

</section>