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Forum: Fields: Magnetic and Otherwise
Re: Question magnetic field in example N04 (W.J. Llope)
Date: 08 Mar, 2013
From: Marc Verderi <Marc Verderi>

Dear Bill,

Please upgrade to 9.6 patch-01: what you describe is a bug in 9.6, that 
patch 01 is fixing.


On 03/08/2013 05:46 PM, W.J. Llope wrote:
> *** Discussion title: Fields: Magnetic and Otherwise
> Hi - I am having trouble with N04 - charged particle trajectories do not
> curve as a result of the magnetic field.
> The only changes i made were to comment out the calorimeter, and to
> change to particle gun event generation, where I throw 0.3 GeV mu+. the
> default field is 3 Tesla, so these tracks should loop, but they are
> quite straight, except for some small wiggles due to multiple
> scattering.
> I put a cout in ExN04Field::GetFieldValue, and i see that this routine
> is being called as the particles are being tracked.
> If i change the particle i'm throwing to a chargedgeantino, the tracks
> loop in the field as expected.
> Any suggestions?
>        bill
> p.s. geant4 version 9.6, OSX 10.7.5
> -------------------------------------------------------------
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