[Gate-users] semi-cylinder detector not recording dose?

[Musajoya Joya]

Dear GATE users,

I have defined a semi-cylinder dose detector as the following;

/gate/phantom/daughters/name                      Filmactive2
/gate/phantom/daughters/insert                    cylinder
/gate/Filmactive2/geometry/setRmin                 2.2403 cm
/gate/Filmactive2/geometry/setRmax                 2.2431 cm
/gate/Filmactive2/geometry/setPhiStart            -45 deg
/gate/Filmactive2/geometry/setDeltaPhi             75 deg
/gate/Filmactive2/geometry/setHeight               1 cm
/gate/Filmactive2/placement/setTranslation        0.0 0 11 cm
/gate/Filmactive2/placement/setRotationAxis       0 0 1
/gate/Filmactive2/setMaterial                     Filmactivelayer

I attached a DoseActor to that volume,

/gate/actor/addActor                           DoseActor  targetdose2
/gate/actor/targetdose2/attachTo                   Filmactive2
/gate/actor/targetdose2/stepHitType                random
/gate/actor/targetdose2/setPosition                0 0 0 cm
/gate/actor/targetdose2/save
output/target/targetdose2.txt
/gate/actor/targetdose2/saveEveryNSeconds          60
/gate/actor/targetdose2/enableDose                 true
/gate/actor/targetdose2/enableUncertaintyDose      true

Unfortunately, the problem is that this combination does not record any
dose and the output is always zero. But, When I change the detector to a
complete cylinder (as below) it calculates the dose.
/gate/phantom/daughters/name                      Filmactive2
/gate/phantom/daughters/insert                    cylinder
/gate/Filmactive2/geometry/setRmin                 2.2403 cm
/gate/Filmactive2/geometry/setRmax                 2.2431 cm
/gate/Filmactive2/geometry/setPhiStart            0 deg
/gate/Filmactive2/geometry/setDeltaPhi            360 deg
/gate/Filmactive2/geometry/setHeight               1 cm
/gate/Filmactive2/placement/setTranslation        0.0 0 11 cm
/gate/Filmactive2/placement/setRotationAxis       0 0 1
/gate/Filmactive2/setMaterial                     Filmactivelayer
I marked the difference between two codes in orange color, dose any
one knows the problem what is wrong?
please help it is vital for my work.

*Best Wishes*

*Musa Joya*

*Ph.D. candidate in Medical Physics *

*Tehran University of Medical Sciences*

*Tehran, Iran &*

*Lecturer of Medical Physics *

*Kabul University of Medical Sciences*

*Kabul, Afghanistan*

*Mobile and Telegram & WhatsApp: +989381560693*
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