9.7. Convoluting data groups

This is one of ATHENA's odder tools. It takes perfectly fine normalized μ(E) data and makes it worse by adding artificial broadening, artificial noise, or both. The broadening can be a Gaussian or a Lorentzian convolution by the selected width in energy. The noise is randomly generated using an epsilon that is chosen as a fraction of the size of the edge step.

Like other tools, there is a button for plotting the data along with its modification and another for turning the modified data into a data group listed in the group list. These are shown in this screenshot. An example of broadened data is shown in on the left in the next figure and an example of data with artificial noise is shown on the right.

../_images/convolution.png

Fig. 9.21 The convolution tool.

../_images/convolution_conv.png

Fig. 9.22 Iron foil data broadened by 1 eV.

../_images/convolution_noise.png

Fig. 9.23 Iron foil data with a bit of artificial noise added.



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