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documentation:post_modifications [2012/04/05 18:16]
142.103.140.43
documentation:post_modifications [2013/04/03 22:21] (current)
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 +One data point for one film can be characterized by the four numbers qz, energy, intensity and type of polarization.
 +
 +Dependent on the type of measurement different modifications could be helpful to analyze the data. The program is capable to do this modifications automatically. ​
 +
 +
 +== Multiply by *qz^4 ==
 +
 +The two main effects in reflectometry are the reflection and transmission at the interfaces (fresnel equations) and interference. ​
 +If you neglect the roughness at the interface the fresnel part is proportional to 1 / qz^4. 
 +Therefore by multiplying the result by qz^4 one can emerge the interference part of the result. ​
 +
 +(TODO: Fit linear if this option is enabled)
 +
 +== Divide by /​cos(2*theta)^2 if pi-light ==
 +
 +The Fresnel formulas between sigma and pi light differ by a factor /​cos(2*theta)^2. If you want to compare the dichroism between sigma- and pi-light you can enable this option. ​
 +
 +== Fourier transformation ==
 +
 + ​Fourier transforms the spectra to determine the layer thicknesses.
 + 
 +
 +== Averaging ==
 +
 + TODO \\
 +
 +
  
documentation/post_modifications.txt ยท Last modified: 2013/04/03 22:21 (external edit)