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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