how to create an "array" of equally distanced straight lines

Hello!
see my files for references (tnx!!!)
i want to subdivide the projection of the arch intercepted by the circle on Xaxis  into equal parts.
I want the edge points,because I need to know the difference of the z cooridnates of their projection on the underlying line and arch.

My definition is very long and it looks to me as bad as using the "grid" component.
Does anyone of you know how in GH can be defined an array of lines?
tnx so much for your help!
adele