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Question Tracking pixel detector 

Forum: Geometry
Date: 11 Jan, 2010
From: Rohin <Rohin>

Hello

I want to simulate a tracking pixel detector, with a geometry consisting of several concentric cylinders.

I tried this set up according to the following sequence 
 1) parametrisation along the radial direction 
 2) replication along phi 
 3) and replication along z direction.

 Everything is working fine except for that I am not able to obtain the position of the pixel which receives the hit. 

I use the following code to get the position of the pixel which recieves the hit.

  G4StepPoint *preStepPoint = aStep->GetPreStepPoint();
  G4TouchableHandle touchable = preStepPoint->GetTouchableHandle();
  G4ThreeVector origin(0.0,0.0,0.0);
  G4ThreeVector pixelPos =   touchable->GetHistory()->GetTopTransform().Inverse().TransformPoint(origin);

But this gives me only the Z cordinate of the pixel and the X and Y coordinates are 0.

Can anyone tell me a solution, or an alternate approach

Thank you

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1 Question: Re: Devide Detector into pixels   (Ibrahim - 13 Jan, 2010)
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