Hello everybody,

I have a question about a specific formula I found in the CST online Help: Post-Processing-Results: Particles: Evaluate 2D-Monitor: Beam divergence Angle. In the formula used here, the is a 2 in the denominator (required if the r_max is the diameter and not the radius) and a 2 outside of the argument. Does this mean that not the half-angle but the full angle of beam divergence is calculated by CST? Is there a specific support page where I can ask about this? Thanks already in advance. Also, here is a link I used to understand the derivaton: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=14647

Have a nice day! 

Cheers, 

Elisabeth

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