G4ava/gdml/threeBGO.gdml

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

<gdml xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:noNamespaceSchemaLocation="http://service-spi.web.cern.ch/service-spi/app/releases/GDML/schema/gdml.xsd">

  <define>
    <!-- Startpositions: 1. BGO beim ersten Zylinder (0–2 cm) -->
    <position name="origin"     unit="cm" x="0" y="0" z="0"/>
    <position name="B1_pos"     unit="cm" x="0" y="0" z="1.0"/>   <!-- Zentrum BGO1: z=1 cm -->
    <position name="B2_pos"     unit="cm" x="0" y="0" z="3.7"/>   <!-- Zentrum BGO2: z=2.7 + 1.0 = 3.7 cm -->
    <position name="B3_pos"     unit="cm" x="0" y="0" z="6.4"/>   <!-- Zentrum BGO3: z=5.4 + 1.0 = 6.4 cm -->
  </define>

  <materials>
    <element Z="1" name="H">
      <atom value="1.0079"/>
    </element>

    <element Z="6" name="C">
      <atom value="12.011"/>
    </element>

    <element Z="7" name="N">
      <atom value="14.007"/>
    </element>

    <element Z="8" name="O">
      <atom value="15.999"/>
    </element>

    <element Z="32" name="Ge">
      <atom value="72.63"/>
    </element>

    <element Z="83" name="Bi">
      <atom value="208.98"/>
    </element>

    <material name="HiVacuum">
      <D value="1.29e-16" unit="g/cm3"/>
      <fraction n="0.7" ref="N"/>
      <fraction n="0.3" ref="O"/>
    </material>

    <material name="BGO">
      <D value="7.13" unit="g/cm3"/>
      <composite n="12" ref="O"/>
      <composite n="3" ref="Ge"/>
      <composite n="4" ref="Bi"/>
    </material>
  </materials>

  <solids>
    <sphere name="world" rmin="0" rmax="25"
            deltaphi="360"
            deltatheta="180"
            aunit="deg"
            lunit="cm"/>

    <!-- Zylinderlänge = 2 cm (z=2) -->
    <tube name="bgo_cylinder_B1"
          rmin="0"
          rmax="2.5"
          z="2"
          deltaphi="360"
          aunit="deg"
          lunit="cm"/>

    <tube name="bgo_cylinder_B2"
          rmin="0"
          rmax="2.5"
          z="2"
          deltaphi="360"
          aunit="deg"
          lunit="cm"/>

    <tube name="bgo_cylinder_B3"
          rmin="0"
          rmax="2.5"
          z="2"
          deltaphi="360"
          aunit="deg"
          lunit="cm"/>
  </solids>

  <structure>
    <volume name="B1_vol">
      <materialref ref="BGO"/>
      <solidref ref="bgo_cylinder_B1"/>
      <auxiliary auxtype="sensi" auxvalue="B1"/>
    </volume>

    <volume name="B2_vol">
      <materialref ref="BGO"/>
      <solidref ref="bgo_cylinder_B2"/>
      <auxiliary auxtype="sensi" auxvalue="B2"/>
    </volume>

    <volume name="B3_vol">
      <materialref ref="BGO"/>
      <solidref ref="bgo_cylinder_B3"/>
      <auxiliary auxtype="sensi" auxvalue="B3"/>
    </volume>

    <volume name="World">
      <materialref ref="HiVacuum"/>
      <solidref ref="world"/>

      <!-- B1: 0–2 cm -->
      <physvol>
        <volumeref ref="B1_vol"/>
        <positionref ref="B1_pos"/>
      </physvol>

      <!-- B2: 2.7–4.7 cm -->
      <physvol>
        <volumeref ref="B2_vol"/>
        <positionref ref="B2_pos"/>
      </physvol>

      <!-- B3: 5.4–7.4 cm -->
      <physvol>
        <volumeref ref="B3_vol"/>
        <positionref ref="B3_pos"/>
      </physvol>
    </volume>
  </structure>

  <setup name="Default" version="1.0">
    <world ref="World"/>
  </setup>
</gdml>