Defining a 2D Gaussian Intensity Profile : Defining a 2D Gaussian Intensity Profile

Requires: S-Pisces/Luminous
Minimum Versions: Atlas 5.28.1.R

This example demonstrates:

  • How to define a 2D Gaussian intensity profile

This example shows an added capability of Luminous where, instead of a uniform beam intensity applied to the surface of the silicon, a Gaussian profile for the beam intensity can be defined.

The definition of the beam is now:

beam num=1 x.origin=2.5 y.origin=-5.0 angle=90 wavelength=0.623 rays=101 gaussian mean=0 xsigma=0.25

The additional parameters are gaussian , mean and xsigma . The GAUSSIAN parameter defines that the intensity distribution is a gaussian, MEAN specifies the location of a mean value of the Gaussian source in the X direction related to the beam coordinate system, and XSIGMA specifies the standard deviation in the X direction of the beam coordinate system.

We recommend that the RAYS parameter is set to a large number as the spacing between rays is always a constant (width of the beam / RAYS ) so in order to obtain a smooth gaussian profile a large number of rays may be necessary.

To load and run this example, select the Load button in DeckBuild > Examples. This will copy the input file and any support files to your current working directory. Select the Run button in DeckBuild to execute the example.