Continuing the discussion from Collimator with Hole Geometry Errors:

I expanded on the design described in the previous discussion. I built a collimator grid of holes and, due to its symmetry, used lattices to split the geometry. I modeled 1/6th of it and then used lattice card to fill in the rest.

My issues is that when I run large particle numbers (10^6 or 10^7), my simulation fails with “TOO MANY ERRORS IN GEOMETRY”.

Based on the previous discussion I:

- Used only
**start_translat**(as opposed to**start_transform**which is more prone to precision errors). - I do not have any geometry errors (that I can find).
- I do not have any overlapping planes.
- The accuracy parameter in GEOBEGIN has been increased to 1e-2.

I believe I am experiencing a build up of precision errors as a result of using LATTICEs but I have implementing all of the mitigation strategies of which I am aware. If someone could take a look at my geometry and give me a suggestion on how to improve it or, at the least, confirm that I need to take a different approach such as not using lattices, I would greatly appreciate it.

*Due to the sensitive nature of the design, I would prefer to share the .flair file privately.*