TRDGEM_HDDS.xml

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

  Hall D Geometry Data Base: TRD/GEM for DIRC commissioning
  **************************************************
	 
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 DIRC commissioning:

in main_HDDS.xml: uncomment the line for the TRDGEM_HDDS.xml in the "forwardPackage" composition
 
<HDDS specification="v1.0" xmlns="http://www.gluex.org/hdds">
-->

<section name        = "TRDGEM"
         version     = "1.0"
         date        = "2019-12-02"
         author      = "Justin Stevens"
         top_volume  = "TGMV"
         specification = "v1.0">

<!-- Origin of TRDGEM is the downstream face of the G10 plane -->
 <composition name="TRDGEM">
    <posXYZ volume="TGPK" X_Y_Z="0.0  0.0  -10.0"/>
 </composition>

 <composition name="TGPK" envelope="TGMV">

    <posXYZ volume="TRDG"    X_Y_Z="0.0  0.0  -44.68"> <plane value="0" /> </posXYZ>
    <posXYZ volume="TRDG"    X_Y_Z="0.0  0.0  -41.77"> <plane value="1" /> </posXYZ>
    <posXYZ volume="TRDG"    X_Y_Z="0.0  0.0  -26.22"> <plane value="2" /> </posXYZ>
    <posXYZ volume="TRDG"    X_Y_Z="0.0  0.0    -4.0"> <plane value="3" /> </posXYZ>
    <posXYZ volume="TRDG"    X_Y_Z="0.0  0.0     2.0"> <plane value="4" /> </posXYZ>

  </composition>

 <box name="TGMV" X_Y_Z="20.0 20.0 90.0"  material="Air" comment="forward GEM/TRD mother" />

 <!-- Fake gas volume is 10cm x 10cm x 1cm  -->
 <box name="TRDG" X_Y_Z="20.0 20.0 2.0"  material="FDchamberGas" sensitive="true" comment="Chamber gas" />

</section>