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None error in the magnetic field for Bx to control the track along y 

Forum: Fields: Magnetic and Otherwise
Date: 25 Oct, 2013
From: Fada Guan <Fada Guan>

I used two uniform magnetic fields to bend proton beam in x and y directions for proton spot scanning.

For example, I want to deliver a spot on (-10 cm, -10 cm) on one plane.

In Geant4.9.5.p01, the proton spot position is correct as specified. However, in Geant4.9.6.p02, for the same problem with the same source code, the spot position is away from the specified position in y direction. It was delivered to (-10 cm, -14 cm).

Please see the attached two pictures.

Who can help check the source code of G4UniformMagField.

Thanks a lot!

FG

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2013/10/25/12.47-7864-_guanfada_Desktop_9.5.png
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2013/10/25/12.47-80530-_guanfada_Desktop_9.6.png

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1 Feedback: Re: error in the magnetic field for Bx to control the track along y   (Gumplinger Peter - 25 Oct, 2013)
(_ None: Re: error in the magnetic field for Bx to control the track along y   (Fada Guan - 25 Oct, 2013)
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