<?xml version="1.0" encoding="UTF-8"?>
<lccdd>
  <define>
    <comment>
      ---------------------------------
      Far Forward B0 Tracker Parameters
      ---------------------------------
    </comment>
    <constant name="ForwardRomanPotA_zpos" value="B1APF_CenterPosition + B1APF_Length/2.0 + 20.0*cm"/>
    <constant name="ForwardRomanPotA_xpos" value="B1APF_XPosition"/>
    <constant name="ForwardRomanPotB_zpos" value="B2PF_CenterPosition - B2PF_Length/2.0 - 20.0*cm"/>
    <constant name="ForwardRomanPotB_xpos" value="B2PF_XPosition "/>
  </define>

  <detectors>
    <detector 
      id="ForwardRomanPotA_ID"
      name="ForwardRomanPotA"
      readout="ForwardRomanPotHits" 
      type="ref_RectangularTracker"
      insideTrackingVolume="true"
      reflect="false"
      vis="Argonne_Red">
      <position x="ForwardRomanPotA_xpos" y="0" z="ForwardRomanPotA_zpos"/>
      <layer id="1" 
        vis="Argonne_Blue"
        x="20.0*cm" 
        y="10.0*cm" >
        <slice material="Air" thickness="1.0*cm" vis="Argonne_Blue" sensitive="true" />
        <slice material="Air" thickness="1.0*cm" vis="Argonne_Blue" sensitive="true" />
        <slice material="Air" thickness="1.0*cm" vis="Argonne_Blue" sensitive="true" />
        <slice material="Air" thickness="1.0*cm" vis="Argonne_Blue" sensitive="true" />
      </layer>
    </detector>
    <detector 
      id="ForwardRomanPotB_ID"
      name="ForwardRomanPotB"
      readout="ForwardRomanPotHits" 
      type="ref_RectangularTracker"
      insideTrackingVolume="true"
      reflect="false"
      vis="Argonne_Red">
      <position x="ForwardRomanPotB_xpos" y="0" z="ForwardRomanPotB_zpos"/>
      <layer id="1" 
        vis="Argonne_Blue"
        x="20.0*cm" 
        y="10.0*cm" >
        <slice material="Air" thickness="1.0*cm" vis="Argonne_Blue" sensitive="true" />
        <slice material="Air" thickness="1.0*cm" vis="Argonne_Blue" sensitive="true" />
        <slice material="Air" thickness="1.0*cm" vis="Argonne_Blue" sensitive="true" />
        <slice material="Air" thickness="1.0*cm" vis="Argonne_Blue" sensitive="true" />
      </layer>
    </detector>
  </detectors>

  <readouts>
    <readout name="ForwardRomanPotHits">
      <segmentation type="CartesianGridXY" grid_size_x="1.0*mm" grid_size_y="1.0*mm" />
      <id>system:8,barrel:3,layer:4,slice:4,x:32:-16,y:-16</id>  
    </readout>
  </readouts>

</lccdd>