<lccdd>
  <comment> MRICH (alternative design) </comment>        
  <define>
    <constant name="MRICH_rmin"   value="10*cm"/>
    <constant name="MRICH_rmax"   value="BackwardPIDRegion_rmax"/>
    <constant name="MRICH_length" value="BackwardPIDRegion_length"/>
    <constant name="MRICH_zmin"   value="BackwardPIDRegion_zmin"/>

    <constant name="MRICHAerogel_thickness"           value="30.0*mm"/>
    <constant name="MRICHAerogel_width"               value="126.5*mm"/>
    <constant name="MRICHFoam_thickness"              value="2*mm"/>
    <constant name="MRICHFresnelLens_thickness"       value="0.06*inch"/>
    <constant name="MRICHAerogelLensGap_thickness"    value="2*mm"/>
    <constant name="MRICHPhotoDet_thickness"          value="1.5*mm"/>
    <constant name="MRICHPhotoDet_length"             value="48.5*mm"/>
    <constant name="MRICHGlassWindow_width"           value="103.5*mm"/>
    <constant name="MRICHGlassPhotoDet_thickness"     value="5.0*mm"/>
    <constant name="MRICHPhotoDetMCPlate_thickness"   value="0.3*mm"/> <!-- FIXME: should be 1.2*mm with PyrexGlass25 -->
    <constant name="MRICHPhotoDetAnode_thickness"     value="3.8*mm"/>
    <constant name="MRICHPhotoDetPCB_thickness"       value="2.0*mm"/>
    <constant name="MRICHPhotoDetCopper_thickness"    value="0.1*mm"/>
    <constant name="MRICHPhotoDetKapton_thickness"    value="0.2*mm"/>
    <constant name="MRICHRearExtraSpace_thickness"    value="0.3*mm"/>
    <constant name="MRICHLensPhotoDet_length"         value="136.4*mm"/>

    <constant name="MRICHFresnelLensEffectiveDiameter" value="6.0*inch"/>
    <constant name="MRICHFresnelLensGroove_pitch"      value="inch/125"/>

    <constant name="MRICHCarbonFrame_thickness"        value="1.0*mm"/>
    <constant name="MRICHCarbonFrame_width"            value="MRICHAerogel_width+2.0*MRICHFoam_thickness + 2.0*MRICHCarbonFrame_thickness"/>

    <constant name="MRICHModules_nx"                  value="floor((MRICH_rmax-MRICH_rmin)/MRICHCarbonFrame_width)"/>
    <constant name="MRICHModules_ny"                  value="floor((MRICH_rmax-MRICH_rmin)/MRICHCarbonFrame_width)"/>

    <constant name="MRICHCarbonFrame_length"
      value="MRICHAerogel_thickness
      + 2.0*MRICHCarbonFrame_thickness
      + 2.0*MRICHFoam_thickness
      + MRICHAerogelLensGap_thickness
      + MRICHFresnelLens_thickness
      + MRICHLensPhotoDet_length
      + MRICHGlassPhotoDet_thickness
      + 2.0*MRICHPhotoDetMCPlate_thickness
      + MRICHPhotoDetAnode_thickness
      + MRICHPhotoDetPCB_thickness
      + MRICHPhotoDetCopper_thickness
      + MRICHPhotoDetKapton_thickness
      + MRICHRearExtraSpace_thickness "/>
  </define>

  <limits>
  </limits>

  <regions>
  </regions>

  <display>
  </display>

  <detectors>
    <detector id="MRICH_ID" name="MRICH" type="athena_MRICH" 
      readout="MRICHHits"
      reflect="true"
      projective="false"
      vis="InvisibleWithDaughters"
      material="Air">
      <dimensions rmin="MRICH_rmin" rmax="MRICH_rmax" length="abs(MRICH_length)" zmin="MRICH_zmin"/>
      <envelope thickness="MRICHCarbonFrame_thickness" material="CarbonFiber"/>
      <module name="MRICH_module1"
              vis="InvisibleWithDaughters"
              width="MRICHCarbonFrame_width"
              height="MRICHCarbonFrame_width"
              length="MRICHCarbonFrame_length">
        <aerogel vis="MRICH_aerogel_vis"
                 length="MRICHAerogel_thickness"
                 width="MRICHAerogel_width"
                 material="AerogelOptical">
          <frame vis="MRICH_frame_vis" thickness="MRICHFoam_thickness" material="PolystyreneFoam" />
        </aerogel>
        <lens vis="MRICH_lens_vis" thickness="MRICHFresnelLens_thickness"
              pitch="MRICHFresnelLensGroove_pitch" focal_length="6.0*inch"
              effective_diameter="MRICHFresnelLensEffectiveDiameter" 
              width="MRICHAerogel_width"
              material="AcrylicOptical"/>
        <space thickness="MRICHLensPhotoDet_length"/>
        <photodet width="MRICHGlassWindow_width" thickness="MRICHGlassPhotoDet_thickness"  material="PyrexGlassOptical">
          <sensor nx="2" ny="2" thickness="MRICHPhotoDet_thickness" width="MRICHPhotoDet_length" material="SiliconOxide"/>
          <layer thickness="MRICHPhotoDetMCPlate_thickness" material="PyrexGlass"/> <!-- FIXME: should be PyrexGlass25 with 1.2*mm thickness -->
          <layer thickness="MRICHPhotoDetMCPlate_thickness" material="PyrexGlass"/> <!-- FIXME: should be PyrexGlass25 with 1.2*mm thickness -->
          <layer thickness="MRICHPhotoDetAnode_thickness"   material="AluminumOxide"/>
          <layer thickness="MRICHPhotoDetPCB_thickness"     material="Fr4"/>
          <layer thickness="MRICHPhotoDetCopper_thickness" material="Copper"/>
          <layer thickness="MRICHPhotoDetKapton_thickness" material="Kapton"/>
        </photodet>
      </module>
    </detector>
  </detectors>

  <readouts>
    <readout name="MRICHHits">
      <segmentation type="CartesianGridXY" grid_size_x="3*mm" grid_size_y="3*mm" />
      <id>system:8,module:14,sensor:8,x:32:-16,y:-16</id>
    </readout>
  </readouts>
  
  <!--Globals>
    <Parameter Name="mrichInfo" Value="mrichmod/mrich_1_geoparams-0-0-4294967295-1527211159.xml"/>
  </Globals-->



</lccdd>