[Gate-users] Which geometry gives the correct answer
Pietrzyk, Uwe
u.pietrzyk at fz-juelich.de
Wed Oct 4 09:27:06 CEST 2017
Hi and good morning,
according to your macro you have 3 volumes at two different
positions, while two are at the same.
> /gate/Phantom/placement/setTranslation 0. 3. 0. cm (1)
> /gate/Phantom/placement/setTranslation 0. 0. 0. cm (2)
> gate/cylinder2/placement/setTranslation 0. 3. 0. cm (??)
also, one volume has material vacuum an two have plexiglass?
Where did you place the source?
Maybe you check the values again, but from what you have sent,
it is difficult to give advice.
Kind regards,
U. Pietrzyk
/----------------------------------------------------------------------
Prof. Dr. Uwe Pietrzyk
Diplom-Physiker
Institut für Neurowissenschaften und Medizin / INM-4
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&
Bergische Universität Wuppertal
Fakultät für Mathematik und Naturwissenschaften
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> On 3. Oct 2017, at 22:15, P. T. <ptpphysics at gmail.com> wrote:
>
> Dear all,
>
> I simulated a simple point source and detector in opposite side of a
> cylinder as Phantom in vGATE72.
>
> I defined two geometry for the Phantom.
>
> First simulation were done with Geo.1 for the Phantom.
> ####################### Geo.1
> /gate/world/daughters/name Phantom
> /gate/world/daughters/insert cylinder
> /gate/Phantom/geometry/setRmax 3 cm
> /gate/Phantom/geometry/setRmin 0. cm
> /gate/Phantom/geometry/setHeight 1 cm
> /gate/Phantom/placement/setTranslation 0. 3. 0. cm <-----------------------
> /gate/Phantom/setMaterial Plexiglass
>
> ###################################
>
> The second simulation was done with Geo.2 for the Phantom.
>
> ######Geo.2
>
> /gate/world/daughters/name Phantom
> /gate/world/daughters/insert cylinder
> /gate/Phantom/geometry/setRmax 9.75 cm
> /gate/Phantom/geometry/setRmin 0. cm
> /gate/Phantom/geometry/setHeight 2 cm
> /gate/Phantom/placement/setTranslation 0. 0. 0. cm <-----------------------
> /gate/Phantom/setMaterial Vacuum
>
>
> /gate/Phantom/daughters/name cylinder2
> /gate/Phantom/daughters/insert cylinder
> /gate/cylinder2/geometry/setRmax 3 cm
> /gate/cylinder2/geometry/setRmin 0. cm
> /gate/cylinder2/geometry/setHeight 1 cm
> /gate/cylinder2/placement/setTranslation 0. 3. 0. cm <-----------------------
> /gate/cylinder2/setMaterial Plexiglass
> ###################################################
>
> Two geometries are not different, but the energy spectrum is different in
> root output.
> Is it a bug in GATE?
> Which geometry gives me the correct answer?
>
> Regards,
> P
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> Gate-users at lists.opengatecollaboration.org
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