Custom Pattern Generator Example

Getting Started:

The following outlines how to use the Custom Pattern Generator to make a user defined source configuration:

  1. Create a source in the main project window
  2. Right click on the source and choose “Edit”
  3. Once in the edit screen, you will see the current default gaussian source shape and controls to the right.
  4. To change the source shape, click on the “Menu Items” drop down and choose “Replace a piece”. Note that the following steps will now replace the source shape but are also the same if “Multiply Piece” or “Add Piece” were chosen.
  5. Click go, then choose “Create custom pattern”
  6. On the top left are the three choices for patterns: SuperGaussian, Hermite polynomial, or Mix-And-Match which specifies separate X and Y patterns to be combined.

SuperGaus:

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For the SuperGaus pattern, there are only two parameters:

  • FWHM X – the full width at half max in the x direction
  • LargeNumX – defines the shape of the gaussian. If you increase LargeNumX, the peak becomes broader and the sides steeper.

Hermite:

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Hermite Parameters:

  • FWHM X – Full width at half max in the x-direction
  • FWHM Y – Full width at half max in the y-direction
  • Hermite X – The order of the hermite polynomial in the x-direction
  • Hermite Y – The order of the hermite polynomial in the y-direction
  • Angle – Rotates the final pattern (degrees)

Mix-And-Match:

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Mix-And-Match Parameters

  • X Pattern – May select Exponential, Gaussian, or SuperGaussian
  • Y Pattern – May select Exponential, Gaussian, or SuperGaussian
  • FWHM X – Full width at half max in the x-direction
  • FWHM Y – Full width at half max in the y-direction
  • Radius – Controls the radius
  • LargeNum – defines the shape of the gaussian. If you increase LargeNumX, the peak becomes broader and the sides steeper.
  • Angle – Rotates the final pattern (degrees)

Finishing:

The next step involves which portion of the source you wish to replace/add/multiply with the selected pattern.

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To replace/add/multiply the entire pattern, click on “Full Win”, or click on “Find Win” and enter an X,Y center along with a width and length in meters.

Next, one is given the option of scaling the new data to a min and max.

Finally, save the new source. The new pattern is updated in the original edit window.

See Also: