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Forum: Fields: Magnetic and Otherwise
Re: Warning Trajectory in dipole field independent of energy ! (Tim Chambers)
Re: None Addendum to above... (Tim Chambers)
Date: 15 Jul, 2005
From: John Apostolakis <John Apostolakis>

Your results are very surprising. It is hard to see how the simpler fields work in your setup but the more complex one does not. The field integration sub-module treats all magnetic fields in the same way (using 'standard' Runge-Kutta integration) unless someone chooses otherwise. So the results that you see are very unusual. Likely there is an issue with the code creating the field.

I would suggest a few more checks:

Can you please let us know the name of the Equation of motion that you are using ? ( I would expect that you do not need to set this (that you are using that provided automatically. )

Also could you post (or give a web link) to the code of your field ?

In addition, it would be helpful to see both the 'physics' step reported by 'tracking/verbose 1' and the exact 'sub-steps' taken in the field -- I will try to provide a way to do this.

Best regards, John Apostolakis

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