[Gate-users] Request for guidance in hole-septa geometry

[Dimitrios Thanasas]

Dear Hussain,

Try this, I think it is ok.

> # FILL THE WHOLE COLLIMATOR WITH SEPTA-HOLE
> /gate/hole/repeaters/insert cubicArray
> /gate/hole/cubicArray/setRepeatNumberX  465
> /gate/hole/cubicArray/setRepeatNumberY 350
> /gate/hole/cubicArray/setRepeatNumberZ 1
> /gate/hole/cubicArray/setRepeatVector  0.127  0.127 0.0 cm

You don't need linear repeater.

Regards,
Dimitris



> Dear Gate users,
> I need some guidance regarding hole -septa structure of collimator as
> explained below;
>
> # C O L L I M A T O R
> /gate/shielding/daughters/name collimator
> /gate/shielding/daughters/insert box
> /gate/collimator/geometry/setXLength 59.1 cm
> /gate/collimator/geometry/setYLength 44.5 cm
> /gate/collimator/geometry/setZLength 2.405 cm
> /gate/collimator/placement/setTranslation 0. 0. -5.0025 cm
> /gate/collimator/setMaterial Lead
> /gate/collimator/attachPhantomSD
> /gate/collimator/vis/forceWireframe
> /gate/collimator/vis/setColor blue
>
> # H O L E S
> /gate/collimator/daughters/name hole
> /gate/collimator/daughters/insert hexagone
> /gate/hole/geometry/setHeight 2.405 cm
> /gate/hole/geometry/setRadius  0.0555 cm
> /gate/hole/placement/setRotationAxis 1 0  0
> /gate/hole/placement/setRotationAngle 0 deg
> /gate/hole/setMaterial Air
> /gate/hole/vis/forceWireframe
> /gate/hole/vis/setColor white
>
> # FILL THE WHOLE COLLIMATOR WITH SEPTA-HOLE
> /gate/hole/repeaters/insert cubicArray
> /gate/hole/cubicArray/setRepeatNumberX  465
> #/gate/hole/cubicArray/setRepeatNumberY 350
> /gate/hole/cubicArray/setRepeatNumberY 4
> /gate/hole/cubicArray/setRepeatNumberZ 1
> /gate/hole/cubicArray/setRepeatVector  0.127  0.127 0.0 cm
>
> # Repeat these holes in a linear
> /gate/hole/repeaters/insert linear
> /gate/hole/linear/setRepeatNumber 2
> /gate/hole/linear/setRepeatVector 0. 0.2405  0.2405 cm
>
> The collimator size is 59.1 x 44.5 x 2.405 and hole hexagonal size is
> (height is 2.405 cm and radius is 0.0555 cm.
> Now the whole collimator should need to be filled with hole and septa of
> 0.016cm.
>
> Can you please guide me what should be the value of repeat vector along X
> and Y direction and the value of setRepeatVector for cubic array and also
> for linear repeater?
> I calculated setRepeatVector X and Y values as by dividing sum of hole
> diameter (0.0555 x 2 = 0.111 cm) and septa (0.016 cm ) (which is
> 0.111+0.016 = 0.127.) with X (59.1cm ) and Y (44.5 cm) of collimator ;
>
> 59.1 / 0.127 =465
> 44.5 / 0.127 = 350
>
> These values are not seems to be practical.
>
> Can anyone guide me, the correct way.
> Thanking you.
>
>
>
> Regards
> Hussain
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