PIPS2.gdml

<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<gdml xmlns:gdml="http://cern.ch/2001/Schemas/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">
  
    <!--CUSTOM BLOCK START-->
    <!--
        The Canberra CAM2000RM PIPS detector used in Minipanda. 
        R = 70.0 mm: diameter of case
        detector recessed 1.0 mm
        Ra = 50 mm: diameter of active area
        L = 8.5 mm:
        Window thickness <2.0 um eq. Si (newer brochure states < 1.5 um)
        Now thickness = 1.5 um
        
    -->
  
  <define>
    <constant name="PIPSR"           value="35.0" />
    <constant name="SiR"             value="25.0" />
    <constant name="SiHHgt"          value="0.15" />
    <constant name="SiRecess"        value="1.0" />
    <constant name="PIPSHHgt"        value="4.25" />
    <constant name="WinHHgt"         value="0.00075" />
    <constant name="PIPSUpperHgt"    value="SiRecess + 2 * WinHHgt + 2 * SiHHgt" />
    <constant name="PIPSLowerHgt"    value="2 * PIPSHHgt - PIPSUpperHgt" />

    
    <position name="SiPos"           unit="mm" x="0." y="0." z="PIPSHHgt - SiRecess - 2 * WinHHgt - SiHHgt" />
    <position name="WinPos"           unit="mm" x="0." y="0." z="PIPSHHgt - SiRecess - WinHHgt" />
    <position name="PIPSUpperPos"    unit="mm" x="0." y="0." z="PIPSHHgt - SiRecess / 2 - WinHHgt - SiHHgt" />
    <position name="PIPSLowerPos"    unit="mm" x="0." y="0." z="PIPSHHgt - PIPSUpperHgt - PIPSLowerHgt / 2" />
    <position name="Nulpos"          unit="mm" x="0." y="0." z="0." />
  </define>
  
  <materials>
  
    <element Z="6" formula="C" name="elemCarbon" >
      <atom value="12.0" />
    </element>
    <element Z="7" formula="N" name="elemNitrogen" >
      <atom value="14.0" />
    </element>
    <element Z="8" formula="O" name="elemOxygen" >
      <atom value="16.0" />
    </element>
    <element Z="13" formula="Al" name="elemAluminum" >
      <atom value="27.0" />
    </element>
    <element Z="14" formula="Si" name="elemSilicon" >
      <atom value="28.1" />
    </element>

    <material formula="fSi" name="Silicon"  state="solid">
      <D value="2.33"  unit="g/cm3"/>
      <composite n="1" ref="elemSilicon" /> 
    </material> 
    <material formula="fair" name="air" state="gas">
      <D value="0.0012" unit="g/cm3"/>
      <fraction n="0.2" ref="elemOxygen"/>
      <fraction n="0.8" ref="elemNitrogen"/>
    </material> 
    <material formula="fAl" name="Aluminum" state="solid">
      <D value="2.7" unit="g/cm3"/>
      <composite n="1" ref="elemAluminum" /> 
    </material> 
  </materials>
  
  <solids>
    <tube  name  =  "PIPSWorld"  rmin="0"  rmax="PIPSR"    z="2 * PIPSHHgt"  deltaphi="360"  startphi="0"
           aunit="deg"  lunit= "mm"/>
    <tube  name  =  "PIPSUpperCase"  rmin="SiR"  rmax="PIPSR"    z="PIPSUpperHgt"  deltaphi="360"  startphi="0"
           aunit="deg"  lunit= "mm"/>
    <tube  name  =  "PIPSLowerCase"  rmin="0."  rmax="PIPSR"    z="PIPSLowerHgt"  deltaphi="360"  startphi="0"
           aunit="deg"  lunit= "mm"/>
    <tube  name  =  "Silicon"  rmin="0"  rmax="SiR"    z="2 * SiHHgt"  deltaphi="360"  startphi="0"
           aunit="deg"  lunit= "mm"/>
    <tube  name  =  "Window"  rmin="0."  rmax="SiR"    z="2 * WinHHgt"  deltaphi="360"  startphi="0"
           aunit="deg"  lunit= "mm"/>

  </solids>
  
  <structure>
    <volume name="PIPSUpperCaseVol" >
      <materialref ref="Aluminum" />
      <solidref ref="PIPSUpperCase" />
    </volume>
    <volume name="PIPSLowerCaseVol" >
      <materialref ref="Aluminum" />
      <solidref ref="PIPSLowerCase" />
    </volume>
    <volume name="WindowVol" >
      <materialref ref="Silicon" />
      <solidref ref="Window" />
    </volume>
    <volume name="SiVol" >
      <materialref ref="Silicon" />
      <solidref ref="Silicon" />
      <auxiliary auxtype="SensDet" auxvalue="PIPS" />
    </volume>
    <volume name="PIPS" >
      <materialref ref="air" />
      <solidref ref="PIPSWorld" />
      <physvol>
        <volumeref ref="PIPSUpperCaseVol" />
        <positionref ref="PIPSUpperPos"/>
      </physvol>
      <physvol>
        <volumeref ref="PIPSLowerCaseVol" />
        <positionref ref="PIPSLowerPos"/>
      </physvol>
      <physvol>
        <volumeref ref="WindowVol" />
        <positionref ref="WinPos"/>
      </physvol>
      <physvol>
        <volumeref ref="SiVol" />
        <positionref ref="SiPos"/>
      </physvol>
    </volume>
  </structure>
  
  <setup name="World" version="1.0" >
    <world ref="PIPS" />
  </setup>
</gdml>