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Forum: Geometry
Re: Question Geant4e error and track propagation with a parallel world volume. (Nicholas Kinnaird)
Re: Feedback Re: Geant4e error and track propagation with a parallel world volume. (Pedro Arce)
Date: 04 Feb, 2016
From: Nicholas Kinnaird <Nicholas Kinnaird>

On Thu, 04 Feb 2016 10:25:42 GMT, Pedro Arce wrote:
> I can try to have a look at your problem, but I need to reproduce it
> first. Can you please send me your code, privately if you prefer?
> 
> Pedro
> 

Hey Pedro, there are a lot of moving parts and some external packages/libraries that my code makes use of, so I doubt it would be illuminating to try and run it yourself. Thanks for the offer though.

I have it on my todo list to make a simpler version of my code to test things out further, but it's been put on hold for now. I can post that here when it's done.

If you really want to check it out for yourself, it will simply consist of a main volume filled completely with vacuum and a parallel world filled with successive rectangular sensitive detectors. Then record the positions of generated particles on each detector (with some uniform magnetic field in the background), and compare those to the positions generated from the error propagation class (from the same starting points). They should be the exact same with just vacuum, but they aren't. (In my code I have volumes in between the SDs that are also made of vacuum, which might change things.)

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