The plot still looks roughly similar to these when the beam sizes were changed to anything in between 0.5 cm and 20 cm. I don’t know why. GPS should be working properly, since if I changed the beam’s position, direction, particle, etc. the plots change accordingly.
I tried scoring dose in 2 ways as well: one using /score/mesh, and the other using a sensitive detector in DetectorConstruction that moves along the z-axis. They both give this same result.
Does anyone have an idea as to why this is? Please let me know. I greatly appreciate it!
Ah yes… another issue is that I can’t visualize it since I’m working on a cluster and it involves complicated permission changes… I tried to do it locally too, but was running into expat library issues that’s taking a long time to solve. I wanted to ask here in case there’s something I missed…
Is it possible that the binned size is relative to the beam location? A simple check to see if the beam is widening is to print the position each particle to see if they are going from a range of -3, 3 to -10, 10
Ah my bad, the x-axis on the plot is just the bin number. There are 128 bins and each bin is ~0.2 cm, so that should span about 25 cm.
And that was so helpful about printing the particle’s positions, thank you! I printed them out and it turns out the range was correct in the y-direction, but for some reason it’s always 0 in the z-direction. I looked up another thread where someone else encountered the same problem (apparently setting the source as “Square” doesn’t work for /gps/pos/halfz). I’ll reorient it around then.
This was great. Thank you so much again for the help!
Yes, I tried /gps/pos/type Beam instead of Plane, but unfortunately it gave the same issue as before (the beam size doesn’t change). I was able to fix it in the end – by changing the direction of the scoring volumes instead of changing gps. Thanks for the suggestion though!
