I would like to have a uniform beam.
I tried many ways but nothing seems to represent what I want.
I do not want a gaussian beam profile, so I changed it to flat beam profile, with radius of the beam the corresponding area I would like to have my flux (i.e. radius 75 mm).
I also saw the topic “Uniform beam illumination of a single pixel” and I tried the square source type with a specific number of particles. In the chase of square beam is the gaussian beam profile or not. Ideally I would like a uniform square beam.
Thank you a lot in advance and sorry for the big text!
Kind regards
Peni
I just simulated a simple situation with a square beam profile of squared_side 5mm and square_angle of 0deg. When I plotted the initial positions of the generated particles by Geant4, I got the graph below:
if the solution provided by @Andrew doesn’t work for you, you can use a Geant4 macro file to define exactly the beam source you would like and load it in the DepositionGeant4 module.