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Cherenkov photons die at the mirror with the new external packages (Feb11) [message #11509] Tue, 22 February 2011 14:21 Go to next message
Maria Patsyuk is currently offline  Maria Patsyuk
Messages: 58
Registered: April 2010
continuous participant
From: *gsi.de
Hello,

after switching to the new external packages (Feb11) Cherenkov photons in the Barrel DIRC simulation started to die on the mirror (see pictures - first is with the old Jan10 packages, the second - with the new Feb11 ones).

I used exactly the same code (PndDrc class and simulation macro) to produce these two pictures, only the version of external packages was different (Jan10 and Feb11).

And I also checked the geometry - it has no overlaps.

I would appreciate any hint helping to find out where does it come from.

Best regards,
Maria Patsyuk
Re: Cherenkov photons die at the mirror with the new external packages (Feb11) [message #11515 is a reply to message #11509] Wed, 23 February 2011 10:50 Go to previous message
Jochen Schwiening is currently offline  Jochen Schwiening
Messages: 84
Registered: June 2009
Location: GSI, Darmstadt
continuous participant
From: *gsi.de
I should add that Geant 3 does not have this problem in the new
external packages. As shown in the attached example, hotons there
behave as they do in the old packages, both G3 and G4.

Cheers,

Jochen

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