[Gate-users] A point source aimed down the X-Axis?

[David Mills]

Hello Devin,

Thank you - that seems to have got it.

Regards,
David

On 10 Jun 2015, at 15:41, Devin VanElburg <vanelbud at tbh.net> wrote:

> Hello David,
> 
> The default position of the viewer is:
> /vis/viewer/set/viewpointThetaPhi 0 0
> /vis/viewer/panTo 0.0 0.0
> 
> You can get a better view of what's going on by changing these values.
> 
> As for the cone, try something like:
> /gate/source/mybeam/gps/ang/mintheta 67.5 deg
> /gate/source/mybeam/gps/ang/maxtheta 112.5 deg
> /gate/source/mybeam/gps/ang/minphi 157.5 deg
> /gate/source/mybeam/gps/ang/maxphi 202.5 deg
> 
> That should restrict your source to a 45 deg cone shape in the x direction.
> 
> Cheers,
> Devin Van Elburg
> -------------------------
> Physics w/ c/ Biomedical Physics
> Lakehead University
> 
> >>> David Mills <d.mills at qmul.ac.uk> 06/10/15 10:09 AM >>>
> Hello,
> 
> I’m still getting to grips with Gate, but I’m having trouble wrapping my head around the geometry.
> 
> I want to have a point source stuck to one wall of my mainbox, sending a cone shaped beam of gamma particles towards a thin filter. Cone angle of 45 degrees. I think what I’ve got is a beam pointing out along the +Z direction instead. Is there any interactive way to drag the volume around in the viewer to see the different planes?
> 
> This is what I have so far, any advice would be gladly received.
> 
> ~~~~~~
> # World
> /gate/world/geometry/setXLength 0.75 m
> /gate/world/geometry/setYLength 0.75 m
> /gate/world/geometry/setZLength 0.75 m
> /gate/world/setMaterial Air
> 
> 
> # Global Box
> /gate/world/daughters/name mainbox
> /gate/world/daughters/insert box
> /gate/mainbox/geometry/setXLength 0.5 m
> /gate/mainbox/geometry/setYLength 0.5 m
> /gate/mainbox/geometry/setZLength 0.5 m
> /gate/mainbox/placement/setTranslation 0 0 0 cm
> /gate/mainbox/setMaterial Air
> /gate/mainbox/vis/setVisible 1
> /gate/mainbox/vis/setColor blue
> 
> 
> 
> # Filter
> /gate/mainbox/daughters/name alu_slice
> /gate/mainbox/daughters/insert box
> /gate/alu_slice/geometry/setXLength 0.5 mm
> /gate/alu_slice/geometry/setYLength 0.5 m
> /gate/alu_slice/geometry/setZLength 0.5 m
> /gate/alu_slice/placement/setTranslation -0.125 0 0 m
> /gate/alu_slice/setMaterial Aluminium
> /gate/alu_slice/vis/setVisible 1
> /gate/alu_slice/vis/setColor red
> 
> # source
> /gate/source/addSource mybeam gps
> /gate/source/mybeam/gps/particle gamma
> ###spectrum stuff removed for brevity
> /gate/source/mybeam/gps/position -0.25 0 0 m
> /gate/source/mybeam/gps/type Point
> /gate/source/mybeam/gps/ang/type iso
> /gate/source/mybeam/gps/ang/mintheta 89 deg
> /gate/source/mybeam/gps/ang/maxtheta 91 deg
> /gate/source/mybeam/gps/ang/minphi 45 deg
> /gate/source/mybeam/gps/ang/maxphi 135 deg
> 
> 
> Regards,
> David
> 
> 
> --
> Dr. David Mills
> Queen Mary, University of London
> Dental Biophysics Section 
> Oral Growth and Development
> Institute of Dentistry
> Francis Bancroft Building 
> London E1 4NS
> UK
> 
> 020 7882 5978
> 07904 121783
> skype : webshed
> 
> _______________________________________________
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> Gate-users at lists.opengatecollaboration.org
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--
Dr. David Mills
Queen Mary, University of London
Dental Biophysics Section 
Oral Growth and Development
Institute of Dentistry
Francis Bancroft Building 
London E1 4NS
UK

020 7882 5978
07904 121783
skype : webshed