[Gate-users] optical photons passing through the surface

[dme627b at gmail.com]

Hi Gaters,

I want to simulate optical photons transmitting from one volume to another, and the surface between the two volumes can be polished or rough. So I need to specify the surface in Surfaces.xml. My question is: what are the type and finish in Surfaces.xml?  How can I specify the surface roughness?

I used the following definition but failed

 
  <surface name="rough" type="dielectric_dielectric" sigmaalpha="6.0" finish="ground">
    <propertiestable>
      <propertyvector name="SPECULARLOBECONSTANT" energyunit="eV">
    <ve energy="1.84" value="1"/>
    <ve energy="4.08" value="1"/>
      </propertyvector>
      <propertyvector name="SPECULARSPIKECONSTANT" energyunit="eV">
    <ve energy="1.84" value="0"/>
    <ve energy="4.08" value="0"/>
      </propertyvector>
      <propertyvector name="BACKSCATTERCONSTANT" energyunit="eV">
    <ve energy="1.84" value="0"/>
    <ve energy="4.08" value="0"/>
      </propertyvector>
    </propertiestable>
  </surface>

Any help is appreciated,

Han
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