<lccdd>

  <comment>Initial implementation of the Athena Detector
           DIRC (ported from g4e). Currently constructed around
           a fixed radius of 83.65cm (between the uRWEL layers).
           TODO: this needs to be properly parameterized.
  </comment>

  <define>
    <comment>
      ### DIRC parameters
    </comment>
    <constant name="DIRC_length"           value="CentralTracking_length + BackwardPIDLength"/>
    <constant name="DIRC_offset"           value="(CentralTracking_length - DIRC_length)/2.0"/>

    <constant name="DIRC_rmin"           value="83.65*cm"/>
    <constant name="DIRCBars_DX"          value="1.7*cm"/>
    <constant name="DIRCBars_DY"          value="42.*cm"/>
    <constant name="DIRCNum"              value="2*Pi*DIRC_rmin/DIRCBars_DY"/>
    <constant name="DIRCDPhi"             value="DIRCBars_DY/DIRC_rmin"/>

    <constant name="DIRC_rmin"              value="82.00*cm"/>
    <constant name="DIRC_rmax"              value="88.00*cm"/>
  </define>

  <limits>
  </limits>

  <regions>
  </regions>

  <display>
  </display>

  <detectors>
    <detector id="BarrelDIRC_ID" name="DIRC" type="DIRC" readout="DIRCHits" vis="AnlTeal">
      <dimensions rmin="DIRC_rmin" rmax="DIRC_rmax" length="DIRC_length" radius="DIRC_rmin" dx="DIRCBars_DX" dy="DIRCBars_DY" number="DIRCNum" deltaphi="DIRCDPhi"/>
      <position x="0" y="0" z="DIRC_offset"/>
      <module name="Module0"  R="DIRC_rmin" phi="0*DIRCDPhi"  />
      <module name="Module1"  R="DIRC_rmin" phi="1*DIRCDPhi"  />
      <module name="Module2"  R="DIRC_rmin" phi="2*DIRCDPhi"  />
      <module name="Module3"  R="DIRC_rmin" phi="3*DIRCDPhi"  />
      <module name="Module4"  R="DIRC_rmin" phi="4*DIRCDPhi"  />
      <module name="Module5"  R="DIRC_rmin" phi="5*DIRCDPhi"  />
      <module name="Module6"  R="DIRC_rmin" phi="6*DIRCDPhi"  />
      <module name="Module7"  R="DIRC_rmin" phi="7*DIRCDPhi"  />
      <module name="Module8"  R="DIRC_rmin" phi="8*DIRCDPhi"  />
      <module name="Module9"  R="DIRC_rmin" phi="9*DIRCDPhi"  />
      <module name="Module10" R="DIRC_rmin" phi="10*DIRCDPhi" />
      <module name="Module11" R="DIRC_rmin" phi="11*DIRCDPhi" />
    </detector>
  </detectors>

  <readouts>
    <readout name="DIRCHits">
      <segmentation type="CartesianGridXY" grid_size_x="3.0*mm" grid_size_y="3.0*mm" />
      <id>system:8,barrel:3,module:12,x:32:-16,y:-16</id>
    </readout>
  </readouts>

  <plugins>
  </plugins>

  <fields>
  </fields>
</lccdd>