I am working on AMS analysis, I use Geant4 to simulate the cosmic ray behaviar around the earth. I find sometimes it can not find the border correctly. It will throw out a G4exception. I just change kRadTolerance from 1e-9mm to 1mm. and it fixed the problem. I just wonder if that will have infuence on the result?
The concept of the tolerance is the following: it is a distance which is too small to matter for the accuracy of the physics or detector that you interested in studying, but much larger than the numerical accuracy of the simulation. If your detector has features of the size of millimiter or centimeter, then it is risky to have tolerance of 1 mm. (Put the tolerance to 1e-2 eg). Else it is ok. This is not a problem report.
