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Forum: Geometry
Re: None Tracks getting stuck (Josh Davies)
Re: None Re: Tracks getting stuck (Youming Yang)
Date: 27 Jun, 2012
From: Josh Davies <Josh Davies>

Some more information:

The volume is two levels of replica to make an array of voxels. The dimensions are all correct and DAVID reports that there are no intersecting volumes.

By making a user stepping action that checks step number, I can manually kill tracks that have too many steps, and print some info. I see output like:

10:###Step count over 1000.
10:###Track in pixel: 1747,2348
10:###Track has momentum: (-21.5382,21.5382,51.1588) KE: 59.54
10:###Step Length: 9.03944e-19
10:###Step count over 1000.
10:###Track in pixel: 1747,2349
10:###Track has momentum: (-21.5382,21.5382,51.1588) KE: 59.54
10:###Step Length: 9.03944e-19
10:###Step count over 1000.
10:###Track in pixel: 1747,2348
10:###Track has momentum: (-21.5382,21.5382,51.1588) KE: 59.54
10:###Step Length: 9.03944e-19
...
10:###Track in pixel: 1747,2349
10:###Track has momentum: (-21.5382,21.5382,51.1588) KE: 59.54
10:###Step Length: 9.03944e-19
10:###Step count over 1000.
10:###Track in pixel: 1747,2348
10:###Track has momentum: (-21.5382,21.5382,51.1588) KE: 59.54
10:###Step Length: 9.03944e-19
10:### Track killed after 1011 steps.

So the track has the KE that it starts with, and gets stuck bouncing between two pixel volumes.

The gammas are associated with Photoelectric effect, Compton scattering and gamma conversion, using the standard G4 packages (not penelope or livermore etc)

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1 None: Re: Tracks getting stuck   (Josh Davies - 28 Jun, 2012)
2 None: Re: Tracks getting stuck   (Youming Yang - 06 Jul, 2012)
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