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Forum: Processes Involving Optical Photons
Re: None Transmission of Optical Photons
Re: Feedback Re: Transmission of Optical Photons (Gumplinger Peter)
Re: Feedback Re: Transmission of Optical Photons
Date: 16 Jul, 2009
From: Gumplinger Peter <Gumplinger Peter>

> Step Too Small 208

> Of these,

> PreVolume expHall, PostVolume Detector: 122

> PreVolume Wrap, PostVolume Tracker; 85

> Also note that when StepTooSmall occured I called the GetStepLength()

> function to see what the step size was and on each of these occurances

> it came up to be 0 cm. I'm not sure the significance of this.

A zero step lentgh step is a 'relocation step' upon reflection; e.g. the following navigation step after G4OpBoundaryProcess has decided on a reflection will be such a relocation step.

> No Refractive Index 265

This happens when medium 1 and/or medium 2 has no MaterialPropertiesTable, or that table has no Index of Refraction; you have a 'backpainted' surface with no index for the gap.

Apparently, the volumes involved are: expHall, Detector, Wrap, tracker, WrapCap and ALRing. I suspect that some of these volumes should be 'metals' (or paints) but you have not defined their surface as dielectric_metal.

You should find out when this happened:

Same Material 1

Do you have two volumes touch each other with the same material?

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1 None: Re: Transmission of Optical Photons   (jdswado@gatech.edu - 24 Jul, 2009)
(_ Feedback: Re: Transmission of Optical Photons   (Gumplinger Peter - 24 Jul, 2009)
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