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Sad Stuck Tracks with Parametrised G4Sphere in world volume 

Forum: Geometry
Date: 08 Jul, 2011
From: Alex Leatherland <Alex Leatherland>

I am trying to use the parametrisation method to create an segmented sphereso that there is no gap between each segment

Currently I use the compute dimensions with the following commands: -
	trackerChamber.SetInnerRadius(newRadiusMin);
	trackerChamber.SetOuterRadius(newRadiusMax);
	trackerChamber.SetStartPhiAngle(newLatt);
	trackerChamber.SetDeltaPhiAngle(fDeltaLattIncr);
	trackerChamber.SetStartThetaAngle(newLong);
	trackerChamber.SetDeltaThetaAngle(fDeltaLongIncr);
Where each input value is calculated based on the copy number.

However I am getting a lot of stuck track errors and forced transportations at the geometry boundaries.

Example Stuck Track Error: -
-----------------------------------------------------------------------------
WARNING - G4Navigator::ComputeStep()
          Track stuck, not moving for 10 steps
          in volume -Tracker_parameterisedPV- at point (2690817014,-1287288199,-1606445097)
          direction: (-0.6975140021,-0.653588018,0.2937633735).
          Potential geometry or navigation problem !
          Trying pushing it of 9e-10 mm ...
ERROR - G4Navigator::ComputeStep()
        Track stuck, not moving for 25 steps
        in volume -World- at point (2690817014,-1287288199,-1606445097)
        direction: (-0.6975140021,-0.653588018,0.2937633735).

*** G4Exception : StuckTrack
      issued by : G4Navigator::ComputeStep()
Stuck Track: potential geometry or navigation problem.
*** Event Must Be Aborted
-----------------------------------------------------------------------------

I am using v9.2.2

Any ideas on where to start debugging?

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1 None: Re: Stuck Tracks with Parametrised G4Sphere in world volume   (Alex Leatherland - 08 Jul, 2011)
(_ None: Re: Stuck Tracks with Parametrised G4Sphere in world volume   (Alex Leatherland - 11 Jul, 2011)
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