[Gate-users] Source not confined properly, spills outside confinement volume

[Ida Häggström]

Hello and thanks for your reply!

Yes, I did run a short simulation (I also thought it might have been just
the visualization), but unfortunately when looking at the *.raw output
images it shows that the source has indeed spilled out. I get scattered and
true coincidences originating from the spilled out areas.

If I can't find a solution I guess I'm left with doing a voxelized source...

Thanks again!
Ida



On Mon, Mar 10, 2014 at 6:34 PM, Marc Chamberland <
MarcChamberland at cmail.carleton.ca> wrote:

> Hi Ida,
>
> Did you try a short simulation with your macro and did you confirm that
> the source is not properly confined? (For example, by looking at the source
> position distribution in the Root output.)
>
> The reason I'm asking is that, in the past, I've found limitations in the
> Geant4 visualization code. For example, see this thread from the mailing
> list:
> http://article.gmane.org/gmane.comp.science.opengate.user/3109/match=source+visualize
>
> My first instinct is that this may be related.
>
> Marc
>
>
>
> __________________________
>
> Marc Chamberland, MSc
> PhD candidate
> Department of Physics
> Carleton University
> Ottawa (ON)
>
> On Mar 10, 2014, at 11:34, Ida Häggström <ida.haggstrom at radfys.umu.se
> <mailto:ida.haggstrom at radfys.umu.se>> wrote:
>
> Hello!
>
> I'm trying to confine a source to a particular phantom geometry, but
> cannot get it to work properly. Part of the source spills out outside the
> confinement volume. Below are codes for the phantom + source and a
> visualization image where you can see the issue.
>
> Any ideas how to solve this?
>
> Thank you in advance! Sincerely,
> Ida
>
> #       P H A N T O M
> /gate/world/daughters/name upperinterior
> /gate/world/daughters/insert cylinder
> /gate/upperinterior/placement/setTranslation 0.0 -3.5 -3.7 cm
> /gate/upperinterior/geometry/setRmax 14.7 cm
> /gate/upperinterior/geometry/setRmin  0.0 cm
> /gate/upperinterior/geometry/setHeight 21.4 cm
> /gate/upperinterior/geometry/setPhiStart 0. deg
> /gate/upperinterior/geometry/setDeltaPhi 180. deg
> /gate/upperinterior/setMaterial Water
> /gate/upperinterior/vis/forceWireframe
> /gate/upperinterior/vis/setColor blue
>
> #       S O U R C E
> /gate/source/addSource F18_upper
> /gate/source/F18_upper/setActivity 1  becquerel
> /gate/source/F18_upper/gps/particle e+
> /gate/source/F18_upper/setForcedUnstableFlag true
> /gate/source/F18_upper/setForcedHalfLife 6586.2 s
> /gate/source/F18_upper/gps/energytype Fluor18
> /gate/source/F18_upper/gps/type Volume
> /gate/source/F18_upper/gps/shape Cylinder
> /gate/source/F18_upper/gps/radius 14.7 cm
> /gate/source/F18_upper/gps/halfz  10.7 cm
> /gate/source/F18_upper/gps/angtype iso
> /gate/source/F18_upper/gps/centre 0.0 -3.5 -3.7 cm
> /gate/source/F18_upper/gps/confine upperinterior_P
> /gate/source/F18_upper/visualize 1000 cyan 2
>
>
> <source_confinement.PNG>_______________________________________________
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