[Gate-users] Problem in making source cold area

[Carlos Azevedo]

Dear all, i am a newbie to GATE, so, i ask apologize if the question 
that i will make is naive.

I am trying to simulate an optical fibber with and without clad.
The fibber should be surrounded by a liquid containing a radioactive source.
My idea was to make a cylindrical source with a cold area corresponding 
to the fibber volume.

I have started with a fibber without clad:

###############
##GEOMETRY
###############
/gate/world/daughters/name Fibras
/gate/world/daughters/insert cylinder
/gate/Fibras/geometry/setRmax 1.0 mm
/gate/Fibras/geometry/setHeight 80. cm
/gate/Fibras/setMaterial Polystyrene
/gate/Fibras/vis/setColor yellow
/gate/Fibras/vis/forceSolid

(...)
#defining the volume and shape of source
/gate/source/Radiation/gps/type Volume
/gate/source/Radiation/gps/shape Cylinder
/gate/source/Radiation/gps/radius 1.05 mm
/gate/source/Radiation/gps/halfz 35. cm
/gate/source/Radiation/gps/centre 0. 0. 0. cm
#Make no activity region on fibers
/gate/source/Radiation/gps/Forbid Fibras


And i got the picture NoClad.png.
It seams to work fine.
Them i have decided to add the clad and the only difference was in the 
geometry:


###########
###GEOMETRY WITH CLAD
###########
/gate/world/daughters/name Fibras
/gate/world/daughters/insert cylinder
/gate/Fibras/geometry/setRmax 1.06 mm
/gate/Fibras/geometry/setHeight 80. cm
/gate/Fibras/setMaterial Polystyrene

/gate/Fibras/daughters/name Core
/gate/Fibras/daughters/insert cylinder
/gate/Core/geometry/setRmax 1.0 mm
/gate/Core/geometry/setHeight 80. cm
/gate/Core/setMaterial Polystyrene
/gate/Core/vis/setColor yellow
/gate/Core/vis/forceSolid

/gate/Fibras/daughters/name Clad
/gate/Fibras/daughters/insert cylinder
/gate/Clad/geometry/setRmax 1.06 mm
/gate/Clad/geometry/setRmin 1.0 mm
/gate/Clad/geometry/setHeight 80. cm
/gate/Clad/setMaterial PMMA
/gate/Clad/vis/setColor blue
/gate/Clad/vis/forceSolid


(...)
#defining the volume and shape of source
/gate/source/Radiation/gps/type Volume
/gate/source/Radiation/gps/shape Cylinder
/gate/source/Radiation/gps/radius 1.11 mm
/gate/source/Radiation/gps/halfz 35. cm
/gate/source/Radiation/gps/centre 0. 0. 0. cm
#Make no activity region on fibers
/gate/source/Radiation/gps/Forbid Fibras

But, in this case, the source cold area is not correct (see WithClad.png)

In this last part i didn't got the message:

"Confirming activity forbidden in volume 'Fibras_phys'...
  Activity forbidden in volume 'Fibras_phys' confirmed"


My question is: is not possible to define a cold area based on volume 
and its daughters?

Your knowledge and help will be very appreciated:



-- 
Untitled Document

Carlos Azevedo
Physics Department
University of Aveiro
Portugal

cdazevedo at ua.pt <mailto:cdazevedo at ua.pt>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opengatecollaboration.org/mailman/private/gate-users/attachments/20170207/b367ca02/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: WithClad.png
Type: image/png
Size: 19769 bytes
Desc: WithClad.png
URL: <http://lists.opengatecollaboration.org/mailman/private/gate-users/attachments/20170207/b367ca02/attachment-0002.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: NoClad.png
Type: image/png
Size: 13508 bytes
Desc: NoClad.png
URL: <http://lists.opengatecollaboration.org/mailman/private/gate-users/attachments/20170207/b367ca02/attachment-0003.png>