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Re: Upcoming DC [message #6253 is a reply to message #6203] Sun, 06 April 2008 15:28 Go to previous messageGo to previous message
Jens Sören Lange is currently offline  Jens Sören Lange
Messages: 193
Registered: June 2005
first-grade participant
From: *web.vodafone.de
Hi all,

Stefano and I thought a bit again about the question,
which macros to use.

And the key question is:

************************************************************
which are our most time-consuming steps in the simu or reco?
************************************************************

And, actually, here the fast sim is the smallest problem,
because - obviously - it is fast by definition. So I changed my opinion a bit.

Therefore I would like to propose three different macro groups
(in other words, our "bottlenecks")

1.) dpm
2.) UrQMD
3.) tpc reco and stt reco
(maybe - if we keep the DC data somewhere - we could actually use it for the long-planned tpc/stt comparison?)

So, concerning 1.)

macro/run/run_sim1.C
with all detectors switched on
and then change the generator to DPM, see
http://panda-wiki.gsi.de/cgi-bin/view/Computing/Dpm
-> "Simulation inside PandaRoot"
and then generate billions of events

Note: unfortunately I don't know anymore how to set the beam energy in
DPM. I have to ask Stefano tomorrow.

So, concerning 2.)

macro/run/run_sim1.C
with all detectors switched on
and then change the generator to UrQMD, see
http://panda-wiki.gsi.de/cgi-bin/view/Computing/UrqmdSmm
here the heavy targets (Au, Pb) are most useful,
because most time-consuming.
anti-proton beam momenta 3.00 and 4.05 GeV
(these are needed for the J/Psi-in-nucleus measurement).
Actually, the GRID would be very useful here to generate as many events as possible!

So, concerning 3.)

macro/tpc/tutorial
runMC.C runDigi.C runReco.C
the svn version of these macros have some difficulties right now
(I just tried again and I have e.g. undefined symbol GeaneTrackRep),
see also
http://forum.gsi.de/index.php?t=msg&th=1802&rid=0&S=dfa54395 2d09c2dca876d4fb1bde7c98#msg_6124
e.g. one has to comment out "UseGeane()".
I hope that we can fix it until the DC
(I know that Dipak has a version which works).

macro/stt
run.C rundigi.C runreco.C
they work fine.

Here I would propose just to use the box generator
for muons with
pT=30,40,50,...100 MeV/c
pT=100,200,300,...,1000 MeV/c
pT=1,2,3,...,7.5 GeV/c
and uniform polar angle.
(the highest point at 7.5 GeV/c is for the Drell-Yan measurement).

What do you think?

cheers, Soeren

 
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