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Re: Usage of Dirc in concord with certain detectors [message #9144 is a reply to message #9088] Thu, 06 August 2009 14:58 Go to previous messageGo to previous message
StefanoSpataro is currently offline  StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino
first-grade participant

From: *15-87-r.retail.telecomitalia.it
Hello,
I have tried to study this behaviour.
First I have run tutorials/lhetrack/run_sim_tpccombi_pgun.C"(100,13,1)" with the standard macro, where Drc is at the end, and everything was running fine.
Than I have moved the Drc part just before Tpc, almost at the beginning, and after 10 events I have a crash in geometry (TGeoNode::Safety).
This is the backtrace:

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Then I have tried to move it between TPC and MVD, and now the error is in TGeoNavigator::FindNextDaughterBoundary :

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I have removed the pipe, thinking about some overlap between it and the DIRC, but without improvements. I have removed all the detectors, and then the simulation runs. Once I put inside all the detectors one by one (keeping dirc at the top after cave), at emc I have again the crash.

Then, we have some problems with geometry, maybe some conflict between dirc and emc, but I am not sure. What is strange is that the crash depends on the order of detectors.
Expert should maybe take a look, trying to understand what is going wrong.

I have done all my tests with geant3 and old external packages. I will try tpo see what will happen with the new ones.


 
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