[Gate-users] Strange Axes Offset

Christopher Watanabe chris.r.watanabe at gmail.com
Fri Nov 8 16:06:42 CET 2019


Hello all,

I was visualizing a pinhole collimator I'm designing, and I noticed
something strange that could effect experiments I run. I've defined my
camera system and collimator as being aligned to the y-axis, where the
pinhole is centered at (0,0,0). When I visualize though, the axes are off
by just the slightest amount, see below.

[image: axes_offput.JPG]
The ball in the middle is defined with the same radius as the pinhole, and
since they are both aligned at (0,0,0), I expect the sphere to sit right
inside the pinhole. However, there's a small offset. The strangest part is
that every piece of the collimator / camera system has 0 x or z translation
(red and blue), which means this shouldn't be the case...

Has anyone else experienced this? And should I be worried?

Thanks!

Chris
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