Custom Pattern Generator Example
The following outlines how to use the Custom Pattern
Generator to make a user defined source configuration:
- Create a source in the main project window
- Right click on the source and choose “Edit”
- Once in the edit screen, you will see the current default
gaussian source shape and controls to the right.
- 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.
- Click go, then choose “Create custom pattern”
- 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.
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 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 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)
The next step involves which portion of the source you wish to
replace/add/multiply with the selected pattern.
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.
