<html> <head> <style></style></head> <body class='hmmessage'><div dir='ltr'>Hi Gate users,<div>I'm trying to simulate a microPET scanner as shown in the figure, using the PETscanner system. To correctly put the sensitive detectors (trapezoid shapes, in green) inside the PETscanner (grey cylinder along Z axis) I had to introduce another cylinder, called PETscanner1 (grey cylinder along X axis). However this object interfere with the simulation, 'deleting' the events that should be detected by the portion of the trapezoids inside PETscanner1 (looking at the Coincidences, there is a circular 'hole' of exactly the same dimensions of PETscanner1) . Do you know how to solve this problem? I tried to create the detectors using only PETscanner, but (as I read on a previous comment) it seems there is a problem with the ring repeater, and my efforts were useless.</div><div>Thanks in advance!</div><div>Stefania</div><div><br></div><div><div>/vis/open OGLSX</div><div>/vis/viewer/reset</div><div>/vis/viewer/set/viewpointThetaPhi 25 45</div><div>/vis/drawVolume</div><div>/vis/viewer/update</div></div><div>/gate/geometry/setMaterialDatabase ....</div><div><div>/gate/world/geometry/setXLength 150. cm</div><div>/gate/world/geometry/setYLength 150. cm</div><div>/gate/world/geometry/setZLength 150. cm</div></div><div><br></div><div># PETscanner: </div><div>#</div><div>/gate/world/daughters/name PETscanner</div><div>/gate/world/daughters/insert cylinder</div><div>/gate/PETscanner/setMaterial Air</div><div>/gate/PETscanner/geometry/setRmax 70 mm</div><div>/gate/PETscanner/geometry/setRmin 55.8 mm</div><div>/gate/PETscanner/geometry/setHeight 150 mm </div><div>/gate/PETscanner/vis/setColor grey</div><div>/gate/PETscanner/vis/forceWireframe</div><div>/gate/PETscanner/vis/setVisible 1</div><div>#</div><div>#</div><div># PETscanner1 (Cylinder where we put the trpd shape)</div><div>#</div><div>/gate/PETscanner/daughters/name PETscanner1</div><div>/gate/PETscanner/daughters/insert cylinder</div><div>/gate/PETscanner1/setMaterial Air</div><div>/gate/PETscanner1/geometry/setRmax 70 mm</div><div>/gate/PETscanner1/geometry/setRmin 55.8 mm</div><div>/gate/PETscanner1/geometry/setHeight 150 mm </div><div>/gate/PETscanner1/vis/setColor grey</div><div>/gate/PETscanner1/vis/forceWireframe</div><div>/gate/PETscanner1/vis/setVisible 1</div><div>#</div><div>/gate/PETscanner1/placement/setRotationAxis 0 1 0 </div><div>/gate/PETscanner1/placement/setRotationAngle 90 deg</div><div>#</div><div># ----------------------------------------------------------</div><div># Trapezoid </div><div>#</div><div>/gate/PETscanner1/daughters/name trapezoid </div><div>/gate/PETscanner1/daughters/insert trpd </div><div>/gate/trapezoid/geometry/setX1Length 40 mm </div><div>/gate/trapezoid/geometry/setY1Length 40 mm </div><div>/gate/trapezoid/geometry/setX2Length 50 mm </div><div>/gate/trapezoid/geometry/setY2Length 50 mm </div><div>/gate/trapezoid/geometry/setZLength 12 mm </div><div>/gate/trapezoid/setMaterial LSO</div><div>/gate/trapezoid/vis/setColor green</div><div>/gate/trapezoid/vis/forceWireframe </div><div>/gate/trapezoid/placement/setTranslation 0. 0. 62. mm</div><div>#</div><div>/gate/trapezoid/repeaters/insert ring </div><div>/gate/trapezoid/ring/enableAutoRotation </div><div>/gate/trapezoid/ring/setFirstAngle 270 deg</div><div># the above line sets the first detector at 12 hour </div><div>/gate/trapezoid/ring/setPoint1 0. 0. 0. mm </div><div>/gate/trapezoid/ring/setPoint2 1. 0. 0. mm </div><div>/gate/trapezoid/ring/setRepeatNumber 8 </div><div>/gate/trapezoid/repeaters/insert cubicArray </div><div>/gate/trapezoid/cubicArray/setRepeatNumberX 2 </div><div>/gate/trapezoid/cubicArray/setRepeatVector 54.4 0.0 0.0 mm </div><div>#</div><div>/gate/geometry/rebuild</div><div>/vis/viewer/zoom 6</div><div>#</div><div>#</div><div># ATTACH SYSTEM </div><div>/gate/systems/PETscanner/level1/attach trapezoid</div><div># ATTACH LAYER SD :</div><div>/gate/trapezoid/attachCrystalSD</div><div><br></div><div><br></div><div> </div> </div></body> </html>