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 Re: Geant4 floating point exception [message #4789 is a reply to message #4785] |
Wed, 01 August 2007 13:50   |
StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino
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first-grade participant |
From: *physik.uni-giessen.de
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The point of my answer (but not written) was:
Our VirtualMC has problems with G4 lists, the only persons that can change the code are from outside the collaboration, so we cannot operate in this sense, just report to them and wait (and this was done).
And in our external packages the data directories where completely missing, and we do not know how it affects our data.
Meanwhile there are two new versions of virtualMC, that require new external packages (such as geant4 9.0), so in some sense our code for g4 is obsolete. The update takes some time and it is not already planned, because it requires some tests.
So with our release it is better to use only G3, at the moment. This will changed hopefully in the next future, but it does not depend only from us. We are the only hep experiment which is using the virtualMC geant4, so we are the "beta tester".
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| Hypernuclei simulation status [message #4795 is a reply to message #4787] |
Wed, 01 August 2007 14:58 |
asanchez
Messages: 350
Registered: March 2006
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first-grade participant |
From: *gsi.de
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hi, i'm still having problems to connect.
From my side,
i wanted to say that the tracking and identification of low kaons seems to be feasible for the tpc and the tof detector.
Unfortunally i can not extract the reconstructed information from the tpc
because Sebastian is still working on.
I have extracted the moementum and the length of the trayectory by myself(helix parametrization ,of course it is an ideal case).
But i will wait till the tpc is able to produce some information from the tracking, to study what is the expected resolution for the low kaon identification(tof).
Here attached i send you some moemnta distributions
in which kaons and the pions distributions (coming from antiXi- annihilation) are plotted. thetPK.eps(kaonon P vs polar angle) and thetPP.eps(pion P vs polar angle)
The only requirement which has to be filled by them, is that both particles have to have a transversal moemnta larger than 300 MeV in order to reach the tof detector + tpc region. The tranversal moemntum distribution of both particles are plotted also together.See ptKP.eps
I'm still working on the Secondary target(silicon strips) and on the HPGE cluster detector digitization.
I want also in the next weeks to finish the implementation
of the Hypernuclei generator, and maybe to start to work on the reconstruction.
I will commit as soon as possible the tof detector.
OK, i hope that can be helpful.
cheers ALicia.
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Attachment: thetPK.eps
(Size: 24.46KB, Downloaded 455 times)
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Attachment: ptKP.eps
(Size: 10.60KB, Downloaded 420 times)
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Attachment: thetPP.eps
(Size: 28.71KB, Downloaded 453 times)
[Updated on: Wed, 01 August 2007 15:19] Report message to a moderator |
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