[Gate-users] No Coincidences Output - SOLVED!

[山中 琢]

Hello Gaters,

I sent a couple of e-mails regarding the coincidences a while ago, and I
finally able to solve the problem.
My solution might not work for everyone, but since it seems that not a few
people having the same kind of problem, I'll explain about my case.

In my case, my system is not the usual cylindrical PET, but the double-head
or parallel PET.
Before, I had the geometry setting the base system as one head and repeating
it for the other side.
I changed that part to set the base system surrounding the total PET
geometry, and added another level for the HEAD.
Then, repeated the HEAD to make the double-head system and attached it to
the level1.
This change finally gave me coincidences.

Part of my working code is shown below.
I tried to get the coincidences by changing the physics, digitizer or
source, but it didn't help me.
Hope this'll help people having trouble with outputs.

-----
# WORLD
/gate/world/geometry/setXLength        240. cm
/gate/world/geometry/setYLength        450. mm
/gate/world/geometry/setZLength        450. mm

# BASE
/gate/world/daughters/name            PETscanner
/gate/world/daughters/insert        box
/gate/PETscanner/setMaterial            Air
/gate/PETscanner/geometry/setXLength    220. cm
/gate/PETscanner/geometry/setYLength    418. mm
/gate/PETscanner/geometry/setZLength    418. mm
/gate/PETscanner/placement/setTranslation    0. 0. 0. cm
/gate/PETscanner/vis/forceWireframe
/gate/PETscanner/vis/setVisible 0

# HEAD
/gate/PETscanner/daughters/name            head
/gate/PETscanner/daughters/insert        box
/gate/head/setMaterial            Air
/gate/head/geometry/setXLength    200. mm
/gate/head/geometry/setYLength    418. mm
/gate/head/geometry/setZLength    418. mm
/gate/head/placement/setTranslation    100. 0. 0. cm
/gate/head/vis/forceWireframe

# ALUMINUM PLATE
/gate/head/daughters/name        AlPlate
/gate/head/daughters/insert        box
/gate/AlPlate/setMaterial            Aluminium
/gate/AlPlate/geometry/setXLength    5. mm
/gate/AlPlate/geometry/setYLength    418. mm
/gate/AlPlate/geometry/setZLength    418. mm
/gate/AlPlate/placement/setTranslation    -97.5 0 0 mm
/gate/AlPlate/vis/setColor            grey
/gate/AlPlate/vis/forceSolid

# SENSOR
/gate/head/daughters/name        sensor_case
/gate/head/daughters/insert        box
/gate/sensor_case/geometry/setXLength    85.5 mm
/gate/sensor_case/geometry/setYLength    31.8 mm
/gate/sensor_case/geometry/setZLength    31.8 mm
/gate/sensor_case/placement/setTranslation    -52.25 0. 0. mm
/gate/sensor_case/setMaterial            Air #change later
/gate/sensor_case/vis/setColor            white
/gate/sensor_case/vis/forceWireframe

# PMT
/gate/sensor_case/daughters/name        PMT
/gate/sensor_case/daughters/insert        box
/gate/PMT/setMaterial                Water #change later?
/gate/PMT/geometry/setXLength        30. mm
/gate/PMT/geometry/setYLength        25. mm
/gate/PMT/geometry/setZLength        25. mm
/gate/PMT/placement/setTranslation    0.25 0. 0. mm
/gate/PMT/vis/setColor                blue
/gate/PMT/vis/forceWireframe

# SCINTILLATOR
/gate/sensor_case/daughters/name        scinti
/gate/sensor_case/daughters/insert        box
/gate/scinti/geometry/setXLength    25. mm
/gate/scinti/geometry/setYLength    2.5 mm
/gate/scinti/geometry/setZLength    2.5 mm
/gate/scinti/placement/setTranslation    -27.25 0. 0. mm
/gate/scinti/setMaterial        GSO
/gate/scinti/vis/setColor        white
#/gate/scinti/vis/setLineStyle    dotted
/gate/scinti/vis/setLineWidth    2
/gate/scinti/vis/forceWireframe

# REPEAT SCINTILLATOR
/gate/scinti/repeaters/insert    cubicArray
/gate/scinti/cubicArray/setRepeatNumberX    1
/gate/scinti/cubicArray/setRepeatNumberY    9
/gate/scinti/cubicArray/setRepeatNumberZ    9
/gate/scinti/cubicArray/setRepeatVector    0. 2.5 2.5 mm

# REPEAT SENSOR
/gate/sensor_case/repeaters/insert        cubicArray
/gate/sensor_case/cubicArray/setRepeatNumberX    1
/gate/sensor_case/cubicArray/setRepeatNumberY    12
/gate/sensor_case/cubicArray/setRepeatNumberZ    12
/gate/sensor_case/cubicArray/setRepeatVector    0. -33. 33. mm

# REPEAT HEAD
/gate/head/repeaters/insert        ring
/gate/head/ring/setRepeatNumber    2
/gate/head/ring/setAngularSpan    180. deg

# ATTACH SYSTEM
/gate/systems/PETscanner/level1/attach head
/gate/systems/PETscanner/level2/attach sensor_case
/gate/systems/PETscanner/level3/attach scinti

# ATTACH CRYSTAL SD
/gate/scinti/attachCrystalSD

# DIGITIZER
/gate/digitizer/Singles/insert                adder
/gate/digitizer/Singles/insert                readout
/gate/digitizer/Singles/readout/setDepth    1

# ENERGY BLURRING
/gate/digitizer/Singles/insert blurring
/gate/digitizer/Singles/blurring/setResolution            0.19
    # energy resolution of 19%
/gate/digitizer/Singles/blurring/setEnergyOfReference    511. keV

# ENERGY WINDOW 350-600keV
/gate/digitizer/Singles/insert                        thresholder
/gate/digitizer/Singles/thresholder/setThreshold    1. keV #gamma, 1kev for
e-
#/gate/digitizer/Singles/insert                        upholder
#/gate/digitizer/Singles/upholder/setUphold            650. keV

# COINCIDENCE SORTER
/gate/digitizer/Coincidences/setWindow    50. ns
/gate/digitizer/Coincidences/MultiplesPolicy    takeAllGoods
/gate/digitizer/Coincidences/minSectorDifference    1
/gate/digitizer/Coincidences/setDepth    1