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Forum: Fields: Magnetic and Otherwise
Re: Question When is called GetFieldValue() ? (Kayo Matsuura)
Re: None Re: When is called GetFieldValue() ? (John Apostolakis)
Date: 26 Nov, 2014
From: Kayo Matsuura <Kayo Matsuura>

Dear John,

I am beginning to understand Geant4's transportation process.
GetFieldValue() is used to solve a particle's equation of motion in the field by each step.
Geant4 handles particle's trajectory, comparing the solved equation with some points (e.g. initial-position, mid-position and endpoint).

> So if you add a print method in your field, and set 
>   /tracking/verbose 1
> you will see that the field is called several times for a typical step.
I set a command you say, I  could check steps.

Thank you for your help.

Best Reagrds,
 Kayo Matsuura

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