[Brahms-dev-l] run-3 reconstruction

There might well be several parametrs that are not optimal for the global
tracking etc.
In general all tracking done til now should also be re-done.
a) Most is not done with closeby tpc calibration since we start them right
off; this is also the rational fro calling the localtracking'sa for run
rather than ltr;
b) As you point out matching-par may not be optimal
c) The geometry is not yet tuned. (Reinstalled T5, T1)
d) We do not keep track of what is done using a file catalog; I think this
is a crucial ingredience that must be made for
this runs large amount of data
on the vertex stuff I personally never liked that the projected vtx was
replace by a BB-vtx. In particular this run where
the triggers do NOT include BB but rather ZDC there may be classes of
'peripheral' events with badly determined BB vtx. I suggest we talk and
settlte this when both you an jamel are here next week.

Flemming



----------------------------------------------------------------
Flemming Videbaek
Physics Department
Brookhaven National Laboratory

e-mail: videbaek@bnl.gov
phone: 631-344-4106
----- Original Message ----- 
From: "Bjorn H Samset" <bjornhs@rcf2.rhic.bnl.gov>
To: "BRAHMS Software list" <brahms-dev-l@lists.bnl.gov>
Sent: Wednesday, February 04, 2004 6:27 AM
Subject: Re: [Brahms-dev-l] TFW2


> On Tue, 3 Feb 2004, Flemming Videbaek wrote:
>
> >
> > Well as far I can see Zhangbao wrote the module. I just added it into
> > the
> > grt scripts. Have no clue if it works, it requeres adc pde do they
> > exsist!?
> > The default cuts (dx) do not look reasonable to me either 0.5 cm -> 3.5
> > just for checkout. You can look soon for run 10051 and see if this works
>
> Hi Flemming and Eun-Joo. I was just about to try the same thing, so I
> looked into the official AuAuGlobalTracking.C a bit. Two things:
>
> First of all, the TFW2 module Flemming added didn't get it's parameters
> set properly:
>   //
>   //TOFW track matching
>   //
>   BrMrsTfw2MatchingModule* tfw2match =
>     new BrMrsTfw2MatchingModule("MRS", "MRS Tfw2 Matching module");
>
>   match->SetNtuple(kTRUE);
>   match->SetTdcRange(10, 4000);   // default is [10, 4000]
>   match->SetMaxAdc(100000);       // default is 0.5
>   match->SetMaxDX(3.5);           // default is 0.5
>   match->SetNoPedWidth(10);       // default is 50
>   swModule->AddModule(tfw2match);
>
> while TOFW matching now has some odd parameters. I've fixed this in the
> official file on bramreco, but not re-done the tracking.
>
> Secondly, I see we still run with
>    ffs->SetUseTrackBeamVtx(kTRUE); // Use track beam vtx for p+p and d+au,
>                                    // otherwise
>                                    // we get in trouble with events that
>                                    // have no bb vertex
>
> Is this the intended behaviour? I'd have thought that for AuAu the bb
> vertex would be pretty stable. (On the other hand I haven't been to BNL
> yet for this run, so I'm not quite up to speed...)
>
> Thirdly, is there any reason not to automatically convert the
> first-generation local track files to ltr<*>v01.root? E.g. this script:
> ~bramreco/bhs/reco/run2ltr.py
> could be set to do this at the end of reconstruction. These files really
> are the version1 that we'll use, so I think this should be done (saves us
> all the 'if ltrVersion==0 then' workarounds, plus forces us to use the
> versioning scheme ;-)
>
> Ping :-)
>
> --Bjorn
>
>
> > Flemming
> >
> > While waiting for beam- and some trigger checkout.
> > It is now pouring, I wonder if snow and ice is not better than rain.
> >
> >
> > Eun-Joo Kim said:
> > > Dear All,
> > >
> > > I am working on C4, and I found... we need TFW2.
> > > Actually I am getting trouble in TFW2 calibration and so on.
> > > Is anybody working on TFW2?
> > >
> > > Some gtr files in /brahms/data14/data/run04 doesn't have any TFW2
> > > matching, whoever it is, would you put the TFW2 matching module?
> > >
> > > Thanks...
> > >
> > > Eun-Joo
> > >
> > >
>
>
> --
> Bjorn H. Samset                           Phone: 22856465/92051998
> PhD student, heavy ion physics            Adr:   Schouterrassen 6
> Inst. of Physics, University of Oslo             0573 Oslo
>                               \|/
> ----------------------------> -*- <-----------------------------
>                               /|\
>
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